[Objectives]This study was conducted to investigate the effects of biochar-based fertilizer on high yield and quality of green pepper(Zanthoxylum armatum var.novemfolius)and soil nutrient status.[Methods]With green pe...[Objectives]This study was conducted to investigate the effects of biochar-based fertilizer on high yield and quality of green pepper(Zanthoxylum armatum var.novemfolius)and soil nutrient status.[Methods]With green pepper and pepper field soil as the research subjects,four treatments were set up,namely,conventional fertilization(T1),conventional fertilization+biochar(T2),biochar-based fertilizer 1(T3),and biochar-based fertilizer 2(T4).[Results]The application of biochar-based fertilizer increased green pepper yield by 9.37%-51.12%,with the order of increase being T4>T3>T2>T1.In terms of soil nutrients,biochar-based fertilizer raised soil pH by 6.67%-53.33%,with the order of increase being T3>T4>T2>T1.The initially strongly acidic soil gradually shifted to weakly acidic and approached neutral,indicating significantly improved soil acidity.The application of biochar-based fertilizer increased the contents of soil organic matter,available nitrogen,available phosphorus,available potassium,available copper,available zinc,available iron,and available manganese.It significantly enhanced green pepper yield,improved soil acidity,and elevated soil nutrient levels.Considering yield,nutrient uptake,and soil nutrient content,biochar-based fertilizer 2(T4)was identified as the optimal treatment.[Conclusions]This study provides a theoretical basis for improving green pepper yield and soil amendment.展开更多
Biochar is a soil amendment for increasing soil quality and decreasing nutrient leaching. However, there is little information on the impact of biochar-based fertilizer(BF) on soil nutrient leaching in agricultural so...Biochar is a soil amendment for increasing soil quality and decreasing nutrient leaching. However, there is little information on the impact of biochar-based fertilizer(BF) on soil nutrient leaching in agricultural soils. We conducted a soil column leaching experiment to study the effects of BF on the leaching of total nitrogen(TN), total phosphorus, and total potassium(TK) in tobacco soils. The distribution characteristics of NH_4^+-N, available P, and available K in soil profiles were analyzed after the application of BF. Biochar was prepared by pyrolysis of fluecured tobacco stems. It was applied at four levels, 0%, 3%,9%, and 15%(w/w), respectively, to the compound fertilizer. Compared with the control, the leaching loss of soil TN decreased by 8.36%, 6.72%, and 6.45%, and the loss of soil TK decreased by 9.18%, 9.31% and 11.82% in the 3%,9%, and 15% BF treatments, respectively. However, BF had no significant effect on the P leaching due to the low movement of P in the soil profile. In addition, the BF addition increased the immobilization of NH_4^+-N, available P, and available K in the soil profile. These results indicate that addition of BF to a tobacco-planting soil reduced nutrient leaching, and suggest that BF could be an effective method of applying biochar to agriculture fields.展开更多
Biochar and biochar-based fertilizer are effective ways to realize the resource utilization of agricultural and forestry wastes.Because of its soil improvement,yield increase,quality improvement and significant enviro...Biochar and biochar-based fertilizer are effective ways to realize the resource utilization of agricultural and forestry wastes.Because of its soil improvement,yield increase,quality improvement and significant environmental effects,it has become a research hotspot,and its application in agriculture has also increased.In this paper,the preparation,types,application methods and effects of biochar-based fertilizer on fruit trees were summarized.Finally,this paper discussed the application prospects of biochar-based fertilizer on fruit trees.展开更多
In order to comprehensively evaluate potential GHG emissions and reduction of applied carbonized waste biomass,a Prospective Life Cycle Assessment(PLCA)was conducted.This evaluation quantified the carbon sequestration...In order to comprehensively evaluate potential GHG emissions and reduction of applied carbonized waste biomass,a Prospective Life Cycle Assessment(PLCA)was conducted.This evaluation quantified the carbon sequestration and GHG(CO2,N2O,CH4)reduction effects of two crop residue biochar-based products(biochar and biochar-based fertilizer)from their production to application stages,including applications in diverse soils(black soil,loess,and laterite)for cultivating paddy and other crops respectively.Results showed that the slow pyrolysis process was the main source of GHG emissions due to electricity consumption.Biochar-based fertilizers exhibited higher GHG emissions than biochar because of the additional energy required for extra processing steps.In addition,under the low-carbon scenario with a higher share of clean energy,GHG emissions at the production stage were significantly reduced compared to those under the baseline scenario.At the usage stage,the GHG emissions varied significantly with soil and crop types.In laterite,biochar-based fertilizers for paddy cultivation effectively reduced GHG emissions,while biochar for other crops increased GHG emissions;in black soil,the GHG emissions reduction of biochar in paddy fields was superior to that of biochar-based fertilizers;in loess,for both paddy and other crops,the GHG emissions reduction of biochar was more pronounced.This study indicates that soil physicochemical properties directly affect the GHG reduction efficiency of biochar-based products,resulting in potentially different GHG emissions or reduction in different soil-crop systems.展开更多
Lodging is a major constraint limiting oil flax production efficiency in northern China.Crop lodging susceptibility is closely related to stem lignin content,and the regulatory mechanisms by which nitrogen and potassi...Lodging is a major constraint limiting oil flax production efficiency in northern China.Crop lodging susceptibility is closely related to stem lignin content,and the regulatory mechanisms by which nitrogen and potassium fertilization interactively influence lignin biosynthesis in oil flax stems require further investigation.Therefore,this study aimed to enhance lodging resistance and increase grain yield in oil flax.We examined the interactive effects of different nitrogen (75,150,and 225 kg N ha–1) and potassium (60 and 90 kg K2O ha–1) fertilizer rates on lignin metabolism,lodging resistance,and grain yield during the 2022 and 2023 growing seasons.Results indicated that nitrogen and potassium fertilizer levels and their interactions promoted lignin accumulation,improved lodging resistance,and increased grain yield.Compared to the control (CK),the75–150 kg N ha–1 combined with 60 kg K2O ha–1 treatments significantly enhanced the activities of key lignin-synthesizing enzymes (tyrosine ammonia-lyase (TAL),phenylalanine ammonia-lyase (PAL),cinnamyl alcohol dehydrogenase (CAD),and peroxidase (POD)) and upregulated the expression of 4CL1 and F5H3 genes,leading to a 29.63–43.30%increase in lignin content,improved stem bending strength and lodging resistance index,and a 23.27–32.34%increase in grain yield.Correlation analysis revealed that nitrogen and potassium fertilizers positively regulated enzyme activities and gene expression related to lignin biosynthesis,thereby facilitating lignin accumulation and enhancing stem mechanical strength and lodging resistance.Positive correlations were observed among lignin-related enzyme activities,gene expression,lodging resistance traits,and grain yield.In summary,the application of 75–150 kg N ha–1 in conjunction with 60 kg K2O ha–1promoted lignin biosynthesis and accumulation,enhanced lodging resistance,and increased grain yield in oil flax grown in the dryland farming region of central Gansu,China.Furthermore,this treatment provides a technical basis for cultivating stress-tolerant and high-yield oil flax in arid regions.展开更多
Farmers in China often use nitrogen(N)fertilizers to ensure adequate crop growth.However,inappropriate applications have increased the risk of environmental pollution,lowered maize yields,and reduced profits for farme...Farmers in China often use nitrogen(N)fertilizers to ensure adequate crop growth.However,inappropriate applications have increased the risk of environmental pollution,lowered maize yields,and reduced profits for farmers.Proper N fertilizer management is crucial for improving yield and nitrogen use efficiency(NUE).This study conducted a three-year experiment involving nine N treatments(0,45,90,135,180,225,270,315,and 360 kg ha-1)on a field under nitrogen fertilizer precision management(NFPM)in Northeast China.The results were compared with studies published within the past decade that analyzed yield and dry matter(DM)content under two management practices in Northeast China:conventional nitrogen fertilization management(CNFM)and water-saving fertilization management(WSFM).The findings reveal that maize yield increases with rising N application rates up to 270 kg ha-1,after which yield decreases.The kernel number(KN)and kernel weight(KW)of maize grown under NFPM were 13.7 and 14.7%higher than those grown under WSFM,respectively.Furthermore,they surpassed crops grown under CNFM by 38.4 and 21.2%,respectively.The maximum total yield of the NFPM treatment was 41.8 and 78.8%higher than under WSFM and CNFM,respectively.In addition,compared with CNFM and WSFM,NFPM significantly increased NUE across the various N-level treatments.Optimizing nitrogen management can help farmers to achieve higher yields and promote sustainable agricultural development.展开更多
Single-time fertilization(STF)with controlled release blended fertilizer(CRBF)improves grain yield and nitrogen use efficiency(NUE)in rice production.However,the impact of soil nitrogen(N)distribution and root growth ...Single-time fertilization(STF)with controlled release blended fertilizer(CRBF)improves grain yield and nitrogen use efficiency(NUE)in rice production.However,the impact of soil nitrogen(N)distribution and root growth on rice yield and NUE under STF with CRBF remains unclear.Here,a two-year field experiment investigated the effects of two fertilizer types(normal urea(U)and CRBF)and two single-time fertilization methods(broadcast and side-deep fertilization)on the soil N distribution,plant N uptake,root characteristics,grain yield,and NUE.The results showed that CRBF under STF increased the averages of plant dry matter accumulation,N uptake,grain yield,nitrogen recovery efficiency(NRE),and nitrogen agronomic efficiency(NAE)by 8.29,21.85,10.57,79.28,and 74.8%compared to the other treatments,respectively.Side-deep fertilization with CRBF further increased NUE by 12.78%compared to broadcast.Moreover,CRBF under STF increased the leaf SPAD value and glutamine synthetase(GS)/glutamine oxoglutarate aminotransferase(GOGAT)activity by 5.93 and 25.58%,respectively.CRBF under STF increased the soil inorganic N concentration and showed a“rising early and stabilizing later”pattern.In addition,CRBF under STF improved rice root growth and increased the averages of root biomass,total root number,root average diameter,total root length,total root surface area,and total root volume by 28.30,28.56,18.64,13.38,35.26,and 37.06%,respectively,at the tillering and heading stages.Partial least squares path modeling indicated that CRBF under STF increased the soil inorganic N concentration which improved root morphology,thereby increasing N uptake and improving the rice yield and NUE.Taken together,our findings show that CRBF with single-time fertilization is the preferred N fertilizer strategy for achieving high yield and efficiency in rice,and that side-deep fertilization is the optimal fertilization method.展开更多
To clarify the remediation effect of microbial inoculant fertilizer on cadmium(Cd)pollution following the application of pig manure organic fertilizer,a field experiment was conducted.No fertilization(CK1)and conventi...To clarify the remediation effect of microbial inoculant fertilizer on cadmium(Cd)pollution following the application of pig manure organic fertilizer,a field experiment was conducted.No fertilization(CK1)and conventional fertilization(CK2)were used as controls.The treatments included conventional fertilization+pig manure organic fertilizer(PM,2800 kg/hm2)and four levels of microbial inoculant fertilizer(7.5,15,22.5,30 L/hm2)combined with the PM treatment.The study compared the effects of different treatments on rice economic traits,yield,Cd content in grains and plants,soil available Cd,total Cd,soil pH,and soil enzyme activities.The results showed that conventional fertilization+pig manure organic fertilizer significantly increased the effective panicle number per hectare and yield of rice.However,it concurrently led to a significant increase in rice grain Cd content,soil available Cd,and total Cd by 26.08%,13.35%,and 16.67%,respectively.Membership function analysis for comprehensive evaluation of economic traits and quality indicated that the treatment with 70%chemical fertilizer+pig manure organic fertilizer received the highest score.Compared with the application of pig manure organic fertilizer alone,the combined application of microbial inoculant fertilizer and pig manure organic fertilizer reduced rice grain Cd content,plant Cd content,total soil Cd,and available Cd by 20.50%~28.42%,4.48%~12.54%,4.98%~10.25%,and 43.28%~49.59%,respectively.Further analysis revealed that the combined application increased soil pH by 0.10~0.24 units,and enhanced the activities of soil sucrase,catalase,urease,and alkaline phosphatase by 7.49%~17.85%,4.19%~10.18%,0.39%~15.69%,and 16.35%~48.08%,respectively.Based on the comprehensive score from principal component analysis,the treatment with microbial inoculant fertilizer at 15 L/hm2+pig manure organic fertilizer+70%chemical fertilizer achieved the highest score.Considering the production economic value,the fertilization model of microbial inoculant fertilizer at 15 L/hm2+pig manure organic fertilizer+70%chemical fertilizer is recommended for application and promotion in local production.展开更多
Phosphorus is one of the main contributors to the eutrophication of water bodies;therefore,phosphorus recycling from agricultural wastewater represents a synergistic approach to achieve both phosphorus management and ...Phosphorus is one of the main contributors to the eutrophication of water bodies;therefore,phosphorus recycling from agricultural wastewater represents a synergistic approach to achieve both phosphorus management and effective resource use.However,the specific removal pathway remains to be optimized.This study investigated the adsorption effect of lanthanum-modified biochar(La-BC)made from agricultural waste on dissolved phosphorus(DP).The maximum unit adsorption capacity of La-BC reached 41.09 mg P/g,representing a 215.35%increase compared to the original biochar(BC)(C 0:500 mg/L;pH:7).Further,the removal effect of La-BC on agricultural non-point source pollutants with different particulate phosphorus(PP)percentages was investigated through dynamic interception and adsorption simulation experiments.The results showed that PP was mostly intercepted by quartz sand while DP was mainly adsorbed by La-BC.Thus,La-BC could effectively remove DP and PP from agricultural wastewater and delay the adsorption depletion point of the dynamic adsorption device,subsequently prolonging its service life.Finally,the agricultural availability of La-BC after adsorption and filtration(La-BC-P)was further explored by soil and plant cultivation.The results indicated that La-BC-P with adsorption interception of fertilizer distribution water had higher plant availability.A higher DP percentage increased the beneficial effects on soil nutrients(available phosphorus increased by 12–16-fold)and plant growth(plant fresh weight increased by 33%).This study innovatively verified the technical feasibility of the"agricultural waste-agricultural non-point source pollution treatment-carbon-based fertilizer"recycling model based on the characteristics of agricultural source wastewater.展开更多
Nitrogen(N)fertilizer deep placement has been widely adopted to improve nutrient use efficiency and maize yield in the semiarid regions of northwest China.However,previous studies on optimal fertilization depth have y...Nitrogen(N)fertilizer deep placement has been widely adopted to improve nutrient use efficiency and maize yield in the semiarid regions of northwest China.However,previous studies on optimal fertilization depth have yielded inconsistent results across climate conditions,limiting its practical application.This study aims to determine the site-specific optimal N fertilization depth for spring maize by evaluating photosynthetic growth dynamics,yield formation,and N utilization in two contrasting semiarid regions.A two-year(2021-2022)field experiment was conducted in Dingxi(semiarid drought-prone region)and Jingning(typical semiarid region),with five fertilization depths:0 cm(D0),5 cm(D5),15 cm(D15),25 cm(D25),and 35 cm(D35).A 15N-labeled urea micro-plot experiment was additionally conducted to trace N fate.The results demonstrated that,compared with the conventional N placement treatment(D15),D25increased soil total N storage,net photosynthetic rate,root bleeding rate,and the concentrations of NO3--N and NH4+-N in the bleeding sap.PLS-PM analysis revealed that fertilization depths that are excessively deep(D35)or shallow(D0,D5,D15)adversely affect the photosynthetic parameters and root activity of maize,thereby inhibiting dry matter accumulation and grain N uptake,which ultimately reduces both yield and nitrogen use efficiency(NUE).Compared with D15,D25 increased grain yield,and NUE by8.79% and 33.19% at Dingxi,and by 7.11%and 11.25% at Jingning.15N isotope tracing revealed that D25 improved maize N uptake while reducing residual soil N and N losses.Regression analysis indicates regional differences in the optimal N application depth.To achieve the lowest N residual loss and the highest yield and NUE,Dingxi(23.49 cm)requires a deeper fertilization depth compared to Jingning(21.64 cm).In conclusion,N fertilizer deep placement is a viable strategy for enhancing agricultural productivity and efficiency in semiarid regions,but the appropriate depth should be selected based on local conditions.展开更多
Extremely high temperatures(HT)caused by global warming pose serious threats to rice production.Potassium(K)is critical for plant stress tolerance,but its role in mitigating heat damage remains unclear.This study aime...Extremely high temperatures(HT)caused by global warming pose serious threats to rice production.Potassium(K)is critical for plant stress tolerance,but its role in mitigating heat damage remains unclear.This study aimed to elucidate how high panicle K application affects mid-season rice HT tolerance in central China.A two-year field experiment grew two rice cultivars(heat-resistant Shanyou 63,SY63;heatsensitive Liangyoupeijiu,LYPJ)under varying sowing dates and two K application levels(low K,LK,50 kg K ha-1;high K,HK,90 kg K ha-1)at the panicle initiation stage.Sowing date l(S1)and sowing date 2(S2)increased the risk of heat stress exposure.Compared with late sowing(S3)under LK,early sowing reduced the yield in LYPJ by 41,3%(S1)and 51.3%(S2)in 2022,and by 35.4%(S2)in 2023,but did not affect the yield in SY63.Compared with LK in the same sowing date,HK increased yield by 44.7%(S1)and 61.5%(S2)in LYPJ in 2022,and by 30.6%(S2)in 2023,whereas it showed no significant effect on SY63 yield.Structural equation modeling analysis indicated that the yield loss could be primarily attributed to heat intensity at the panicle initiation and maturity stages.HK increased stomatal conductance and improved leaf water potential,thereby reducing canopy temperature by 1,2-1.3℃at heading and 1.1-2.5℃at maturity.Concurrently,HK enhanced carbohydrate supply and elevated enzyme activity for sugars utilization in anthers,collectively enhancing pollen viability and spikelet fertility.HK optimized source-sink traits via increasing leaf area index,specific leaf weight,spikelets per unit leaf area,post-anthesis translocation of stem dry matter(47.5%-48.9% in 2022 and 24.0% in 2023),and postanthesis dry matter accumulation(33.0%-38.2% in 2022 and 19.0% in 2023).The study indicates that early sowing increases the risk of heat stress exposure for mid-season rice in central China,and the increase of panicle K application can mitigate yield loss by lessening canopy temperature and optimizing source-sink relationships.展开更多
The objective of this study was to identify the suitable blended controlled-release nitrogen(N)fertilizer strategies(BCRNFs)for soft wheat production and to elucidate its underlying physiological mechanisms.A two-year...The objective of this study was to identify the suitable blended controlled-release nitrogen(N)fertilizer strategies(BCRNFs)for soft wheat production and to elucidate its underlying physiological mechanisms.A two-year field experiment conducted at two sites using two N application rates and three N fertilizer types.In each N rate,the N fertilizer types include:CK,common urea applied twice;BCRNF1,which featured a single basal application of a 3:2 blend of 60-d and 180-d controlled-release N fertilizers,aiming to delay N release until later growth stages;BCRNF2,which featured a single basal application of 3:4:3 blend of urea,60-d,and 180-d controlled-release N fertilizer,aiming to release N from early to middle growth stages.Compared with CK,BCRNF2 promoted starch synthesis and sucrose supply during the late grain-filling period of soft wheat,thereby increasing starch and amylose contents as well as the amyloseto-amylopectin ratio,while diluting protein and its component contents.The changes in these parameters mediated by BCRNF2 directly increased peak viscosity,trough viscosity,breakdown viscosity,final viscosity,and setback viscosity,ultimately improving soft wheat quality.BCRNF1 under reduced N application enhanced sucrose transport and starch synthesis capacity during the late growth period,which similarly supported the increase in starch content,the decrease in protein content,and the improvement of some key pasting characteristics.Therefore,BCRNF1 under reduced N conditions and BCRNF2 under conventional N conditions can enhance final grain quality and processing quality by increasing carbon metabolism during soft wheat grain filling,making them suitable for soft wheat production.展开更多
The objective of this study was to identify an application strategy for a blend of two controlled-release nitrogen fertilizers(CRNFs) that optimized yield and N-use efficiency of late japonica rice in the Yangtze Rive...The objective of this study was to identify an application strategy for a blend of two controlled-release nitrogen fertilizers(CRNFs) that optimized yield and N-use efficiency of late japonica rice in the Yangtze River Delta. In a two-year field experiment using high-yield split-applied urea(CK) and no-N fertilization as control(N0), nine CRNF treatments were evaluated for their effects on grain yield, N uptake(NUP), soil ammonium nitrogen(NH4+-N) dynamics, and ammonia volatilization(AV). The treatments included sulfur-coated urea(SCU), urease inhibitor urea(AHA), 90-d polymer-coated urea(P90), 120-d polymer-coated urea(P120), and five BBFs prepared by mixing CRNFs at a 3:7 ratio(AHAP90, SP90,AHAP120, SP120, and P90P120). Based on N release characteristics, CRNFs were categorized into four release modes: pre-positioned single-peak(PrSRM), post-positioned single-peak(PoSRM), decreasing double-peak(DDRM), and increasing double-peak(IDRM). Synchronization between soil NH4+-N dynamics under CRNFs and plant N uptake rate(NUPR) under CK was quantified using dynamic time warping(DTW), with smaller values indicating higher synchrony. Results showed that single-peak release modes significantly reduced grain yield and NUP by 12.6% and 10.5%, respectively. The IDRM treatment, a blend of 90-d and 120-d polymer-coated urea, showed NH4+-N supply dynamics most closely matching the N demand of high-yielding rice, with lower two-year average DTW values(SSRDTW 1.01, NUPSDTW1.72) than DDRM(1.03 and 2.00), which translated into increases in spikelet number, grain yield, and NUP by 4.49%,6.03%, and 4.85%, respectively, while decreasing AV by 86.7% compared with CK. One-time application of IDRM fertilizer can align soil NH4+-N supply with rice N demand, ensure high yield, and reduce N losses,providing an optimized fertilization strategy for sustainable rice production in the Yangtze River Delta.展开更多
Soil aggregates highly regulate nitrogen(N)turnover,yet their functions in regulating N retention under long-term crop rotation remain unclear.This study used15N-labeled fertilizer N to investigate how different-si...Soil aggregates highly regulate nitrogen(N)turnover,yet their functions in regulating N retention under long-term crop rotation remain unclear.This study used15N-labeled fertilizer N to investigate how different-sized soil aggregates regulate fertilizer N retention and redistribution under long-term crop rotation systems.The results revealed that large macroaggregates exhibited a more pronounced depletion of fertilizer N(enrichment factor,Ef:0.73-0.95)than of total N(Ef:0.93-1.00).In contrast,macroaggregates and microaggregates enriched fertilizer N(Ef:1.00-1.16).Crucially,we found a temporal divergence:after harvest(with new15N-labeled fertilizer application),macroaggregates preferentially sequestered new N(current-season fertilizer N),whereas microaggregates dominated the stabilization of old N(previous-year fertilizer N)in the absence of15N-labeled fertilizer in 2024.This functional specialization is driven by aggregate turnover,whereby disintegrating macroaggregates release old N for stabilization in microaggregates,while reforming macroaggregates encapsulate new N.The accelerated release of fertilizer N from these macroaggregates during crop cultivation supplies N to crops,while their reformation concurrently enriches new N.This process underscores the dual functions of macroaggregates in both supplying N to crops and enriching new N.Ultimately,crop rotations reinforce this beneficial dynamic by restructuring soil aggregation,leading to a marked expansion of the soil N pool,with fertilizer N storage increasing by 27.11-111.68%and total N storage by 2.94-14.22%compared to continuous cropping.Our findings establish the functional heterogeneity of soil aggregates as a key mechanism for long-term fertilizer N retention and stabilization.This provides a mechanistic basis for optimizing N management under crop rotations.展开更多
This study investigated the effectiveness of manure-based slurry film(MSF)technology and validated its dual benefits in reducing mineral fertilizer input and enhancing fertilizer use efficiency through field experimen...This study investigated the effectiveness of manure-based slurry film(MSF)technology and validated its dual benefits in reducing mineral fertilizer input and enhancing fertilizer use efficiency through field experiments.The results showed that MSF maintained silage maize yield while reducing mineral fertilizer input by 30%,and achieved a significant yield increase under 15%reduction in fertilizer input compared to standard polyethylene film.An investigation of soil microorganisms demonstrated that MSF changed the microbial community structure,promoting the activation and use efficiency of nutrients such as nitrogen,phosphorus and potassium,while increasing soil organic matter content.Life cycle assessment was performed with SimaPro 9.5 revealing that the environmental impact of MSF is significantly greater than that of polyethylene film across various environmental assessment factors.The high environmental impact of MSF production stems from its energy and water consumption,necessitating a focus on process simplification while maintaining high yield.This study provides new insights into the development of cleaner technologies,examines diversified uses of cow manure,emphasizes the role of MSF in reducing mineral fertilizer application,and highlights potential environmental risks.展开更多
The potential of hydroxyapatite(HA)nanoparticles as an alternative fertilizer has been extensively explored to mitigate the negative effects of conventional fertilizers on soil health.However,their low solubility in s...The potential of hydroxyapatite(HA)nanoparticles as an alternative fertilizer has been extensively explored to mitigate the negative effects of conventional fertilizers on soil health.However,their low solubility in soil remains a significant challenge as this property reduces their efficiency for controlled nutrient delivery.To address this challenge,organic-inorganic nanocomposites,particularly HA-biopolymer-based nanofertilizers,have been proposed.These biocomposites combine the nutrient-rich feature of HA with the improved solubility and controlled-release ability provided by biopolymers,while also enhancing soil interaction to ensure more efficient and sustainable fertilization.The polymeric phase plays a key role in nutrient solubilization kinetics by facilitating microbial release,minimizing the need for frequent application,and reducing the toxicity to plants,which altogether reduces the overall environmental implications of fertilizer application.Despite recent advances,several key scientific gaps remain unaddressed,including the optimization of synthesis methods,the role of polymer composition in nutrient release kinetics,and the long-term effects of these nanofertilizers on soil health and plant productivity.This review provides a comprehensive analysis of the recent progress and prospects for HA-based nanofertilizers,emphasizing synthesis techniques,structural properties,and performance in soil environments.Additionally,it highlights the need for tailored approaches to optimize nutrient release profiles,ensuring sustained nutrient availability,reduced environmental impact,and enhanced agricultural productivity.By identifying these knowledge gaps,this review aims to guide future research toward the design of next-generation HA-biopolymer nanocomposites with improved efficiency and sustainability compared to existing ones.展开更多
Lime application represents an established approach for ameliorating soil acidity,and understanding its effects on the interactions between aluminum(Al)and iron(Fe)oxides and soil organic carbon(SOC)fractions is essen...Lime application represents an established approach for ameliorating soil acidity,and understanding its effects on the interactions between aluminum(Al)and iron(Fe)oxides and soil organic carbon(SOC)fractions is essential for promoting sustainable agricultural practices that enhance carbon sequestration.This investigation examined the interactions among Al and Fe oxides and SOC fractions under long-term fertilization and liming.A long-term field experiment was implemented with five treatments:CK(no fertilizer),N(nitrogen fertilizer),NCa(N plus lime),NPK(nitrogen,phosphorus,and potassium fertilizer),and NPKCa(NPK plus lime).Soil samples were obtained from three depths:0-10,10-20,and 20-30 cm.The findings revealed that lime application increased SOC by 20.84%under the N treatment but decreased SOC by 9.97%under NPK.At the 0-10 cm depth,dissolved organic carbon(DOC)was substantially higher under NCa(410.51 mg kg-1)and NPKCa(372.83 mg kg-1)compared with CK.Particulate organic carbon(POC)and mineral-associated organic carbon(MAOC)demonstrated consistent enhancement under NPK and NPKCa across all soil depths compared with CK.DOC exhibited significant positive correlations with both aluminum(Ald),reactive aluminum(Alo)and aluminum(Alp),indicating a key role of organically bound and reactive Al in carbon dynamics.Compared to the CK treatment,SOC stock increased significantly by 43.49%under NPK and by 36.82%under NPKCa.Structural equation modeling demonstrated that lime application mitigated the negative effects of free Al(Ald)on carbon sequestration,while Fe oxides(Fed)contributed positively to SOC stabilization.DOC showed no significant impact on carbon sequestration rate(CSR),while easily oxidizable carbon(EOC)negatively affected CSR directly.These results highlight the crucial role of lime in improving acidic soil conditions and enhancing the stability and sequestration of soil organic carbon.展开更多
The application of slow-controlled release fertilizer is a simple and labor-saving cultivation technology that can improve the yield and nitrogen use efficiency(NUE)of wheat,although research on the impact of a single...The application of slow-controlled release fertilizer is a simple and labor-saving cultivation technology that can improve the yield and nitrogen use efficiency(NUE)of wheat,although research on the impact of a single application of controlledrelease nitrogen(N)fertilizers with different release periods on wheat grain quality is still limited.In this study,urease inhibitor urea(AHA),sulfur-coated urea(SCU),a combination of SCU and AHA fertilizer(BSAF)and blended slowcontrolled release fertilizer(BRNF)were used to investigate the effect of slow-controlled release fertilizers on the nutrient release,grain yield,NUE,and protein content of soft wheat.The goal was to determine the effect of a one-time application of controlled release fertilizer on wheat grain yield and protein content and its underlying mechanisms.The results showed that the different slow-controlled release fertilizer treatments had significantly different N release rates.AHA presented a fast release mode,while SCU and BSAF presented slow-release modes,and BRNF presented a controlled release mode.Compared with CK,BRNF increased grain yield and reduced the protein content of soft wheat,with an average increase of 6.73%in grain yield and a reduction of 1.85%in protein content.The higher N absorption of BRNF led to greater NUE,N agronomic efficiency(NAE)and N apparent recovery fraction(NRF).However,AHA,SCU and BSAF all showed the opposite trend.Compared with CK,BRNF improved post-anthesis dry matter accumulation(PDMA)and the contribution rate of dry matter accumulated post-anthesis to the grain(CDA),while reducing post-anthesis N accumulation(PNA)and the contribution rate of post-anthesis N accumulation to grain(CNA).The main reasons for the improvement in yield and reduction in protein content were related to the increases in PDMA and CDA,and the reductions in PNA and CNA,respectively.Therefore,BRNF is an effective agronomic strategy for promoting the coordination of grain yield and quality in soft wheat.展开更多
Hydrothermal cracking converts biomass waste into superior organic fertilizer by hydrolyzing it at temperatures of 180–220℃ and pressures of 1.5–2.45 MPa,enhancing treatment efficiency and nutritional value.Most of...Hydrothermal cracking converts biomass waste into superior organic fertilizer by hydrolyzing it at temperatures of 180–220℃ and pressures of 1.5–2.45 MPa,enhancing treatment efficiency and nutritional value.Most of the research on hydrothermal cracking solid organic fertilizer(HCSOF)has been centered on its characterization and fertilizer properties;however,research is scarce regarding its greenhouse gas emissions and toxic metals(TMs).This study assesses the carbon and nitrogen retention rate and TMs of industrial HCSOF.Specifically,environmental impact was evaluated using indicators such as hazard quotient(HQ)and risk assessment code(RAC),with planting experiments conducted to assess TM's effect on soil and plants.The results indicate that industrial HCSOF has a high fixed carbon rate of up to 91.2%and a fixed nitrogen rate of 98.40%,manifesting the potential for reducing greenhouse gas emissions.Additionally,HCSOF contains high ecological safety of TMs such as Hg(HQ=0.008,RAC=0%),As(HQ=0.055,RAC=37.08%),Cd(HQ=0.708,RAC=1.76%),Pb(HQ=0.176,RAC=0.87%),and Cr(HQ=0.853,RAC=0.12%).After being applied to sandy soil,15,000 kg/ha of HCSOF can increase the organic matter and nutrients in both soil and maize straw,reducing TMs and their ecological risks.By obtaining a deeper understanding of the composition and practical application of industrial HCSOF,valuable insights can be offered to reduce greenhouse gas emissions and eliminate potential risks associated with TM pollution.展开更多
The excessive reliance on chemical inputs for managing soil nutrients and pathogens has raised concerns about their long-term sustainability and environmental impact.In contrast,the use of soil microbes offers an eco-...The excessive reliance on chemical inputs for managing soil nutrients and pathogens has raised concerns about their long-term sustainability and environmental impact.In contrast,the use of soil microbes offers an eco-friendly and efficient alternative for improving soil fertility and plant growth.Beneficial microorganisms,including plant growth-promoting rhizobacteria(PGPR),mycorrhizal fungi,and other soil organisms,play pivotal roles in nutrient cycling,organic matter decomposition,and nutrient availability improvement.This review explores the potential of leveraging microbial resources for sustainable soil nutrient management and resilient crop production.It delves into the intricate interactions between host plants and PGPR,particularly under nutrient-limited and fluctuating environmental conditions,with a focus on the molecular signaling pathways and mechanisms regulating these relationships.Furthermore,it emphasizes the role of advanced techniques and PGPR-responsive microRNAs to uncover the functional capabilities of microbial communities and their dynamic interactions with plants.These approaches pave the way for developing innovative,microbe-based strategies to optimize nutrient use efficiency,reduce dependency on synthetic fertilizers,and support sustainable agricultural practices.展开更多
基金Supported by General Project of Chongqing Technology Innovation and Application Demonstration(Social People s Livelihood Category)(cstc2018jscx-msybX0215)Horizontal Project of Chongqing Agricultural Technology Extension Station(WLHX-2021-0113).
摘要[Objectives]This study was conducted to investigate the effects of biochar-based fertilizer on high yield and quality of green pepper(Zanthoxylum armatum var.novemfolius)and soil nutrient status.[Methods]With green pepper and pepper field soil as the research subjects,four treatments were set up,namely,conventional fertilization(T1),conventional fertilization+biochar(T2),biochar-based fertilizer 1(T3),and biochar-based fertilizer 2(T4).[Results]The application of biochar-based fertilizer increased green pepper yield by 9.37%-51.12%,with the order of increase being T4>T3>T2>T1.In terms of soil nutrients,biochar-based fertilizer raised soil pH by 6.67%-53.33%,with the order of increase being T3>T4>T2>T1.The initially strongly acidic soil gradually shifted to weakly acidic and approached neutral,indicating significantly improved soil acidity.The application of biochar-based fertilizer increased the contents of soil organic matter,available nitrogen,available phosphorus,available potassium,available copper,available zinc,available iron,and available manganese.It significantly enhanced green pepper yield,improved soil acidity,and elevated soil nutrient levels.Considering yield,nutrient uptake,and soil nutrient content,biochar-based fertilizer 2(T4)was identified as the optimal treatment.[Conclusions]This study provides a theoretical basis for improving green pepper yield and soil amendment.
基金supported by the National Natural Science Foundation of China (Nos. 41773144 U1612441+5 种基金 41503080)the Key Technologies R&D Project in Agriculture of Guizhou province (Nos. NY [2013] 3019 NY [2015] 3001-1)the Major S&T Special Project of Guizhou province (No. [2014] 6015-21)the Opening Fund of the State Key Laboratory of Environmental Geochemistry (SKLEG2018905)Innovative Plan of Guizhou province and the Science and Technology Project of Guizhou Tobacco Company (201614)
摘要Biochar is a soil amendment for increasing soil quality and decreasing nutrient leaching. However, there is little information on the impact of biochar-based fertilizer(BF) on soil nutrient leaching in agricultural soils. We conducted a soil column leaching experiment to study the effects of BF on the leaching of total nitrogen(TN), total phosphorus, and total potassium(TK) in tobacco soils. The distribution characteristics of NH_4^+-N, available P, and available K in soil profiles were analyzed after the application of BF. Biochar was prepared by pyrolysis of fluecured tobacco stems. It was applied at four levels, 0%, 3%,9%, and 15%(w/w), respectively, to the compound fertilizer. Compared with the control, the leaching loss of soil TN decreased by 8.36%, 6.72%, and 6.45%, and the loss of soil TK decreased by 9.18%, 9.31% and 11.82% in the 3%,9%, and 15% BF treatments, respectively. However, BF had no significant effect on the P leaching due to the low movement of P in the soil profile. In addition, the BF addition increased the immobilization of NH_4^+-N, available P, and available K in the soil profile. These results indicate that addition of BF to a tobacco-planting soil reduced nutrient leaching, and suggest that BF could be an effective method of applying biochar to agriculture fields.
基金Supported by Modern Agriculture(Citrus)Industrial Technology System Construction Project(CARS-26)Undergraduate Innovation and Entrepreneurship Training Program(202310580007)Guangdong Provincial Science and Technology Innovation Strategy Special Fund(Undergraduate Science and Technology Innovation Cultivation)Project(pdjh2024b406).
摘要Biochar and biochar-based fertilizer are effective ways to realize the resource utilization of agricultural and forestry wastes.Because of its soil improvement,yield increase,quality improvement and significant environmental effects,it has become a research hotspot,and its application in agriculture has also increased.In this paper,the preparation,types,application methods and effects of biochar-based fertilizer on fruit trees were summarized.Finally,this paper discussed the application prospects of biochar-based fertilizer on fruit trees.
基金supported by the Enabling and Leveraging Climate Action Towards Net-Zero Emissions(No.ELEVATE-101056873)of the European Unionthe Green Production and Sustainable Development in Secondary Aluminum,Lead,Zinc and Lithium Sectors in China(NO.GEF-10673)the Young Scientists Fund of the National Natural Science Foundation of China(No.52200223).
摘要In order to comprehensively evaluate potential GHG emissions and reduction of applied carbonized waste biomass,a Prospective Life Cycle Assessment(PLCA)was conducted.This evaluation quantified the carbon sequestration and GHG(CO2,N2O,CH4)reduction effects of two crop residue biochar-based products(biochar and biochar-based fertilizer)from their production to application stages,including applications in diverse soils(black soil,loess,and laterite)for cultivating paddy and other crops respectively.Results showed that the slow pyrolysis process was the main source of GHG emissions due to electricity consumption.Biochar-based fertilizers exhibited higher GHG emissions than biochar because of the additional energy required for extra processing steps.In addition,under the low-carbon scenario with a higher share of clean energy,GHG emissions at the production stage were significantly reduced compared to those under the baseline scenario.At the usage stage,the GHG emissions varied significantly with soil and crop types.In laterite,biochar-based fertilizers for paddy cultivation effectively reduced GHG emissions,while biochar for other crops increased GHG emissions;in black soil,the GHG emissions reduction of biochar in paddy fields was superior to that of biochar-based fertilizers;in loess,for both paddy and other crops,the GHG emissions reduction of biochar was more pronounced.This study indicates that soil physicochemical properties directly affect the GHG reduction efficiency of biochar-based products,resulting in potentially different GHG emissions or reduction in different soil-crop systems.
基金funded by the National Natural Science Foundation of China (31760363)the Earmarked Fund for CARS (CARS-14-1-16)+1 种基金the Gansu Education Science and Technology Innovation Industry Support Program,China (2021CYZC-38)the Gansu Provincial Key Laboratory of Arid Land Crop Science,Gansu Agricultural University,China (GSCS-2020-Z6)。
摘要Lodging is a major constraint limiting oil flax production efficiency in northern China.Crop lodging susceptibility is closely related to stem lignin content,and the regulatory mechanisms by which nitrogen and potassium fertilization interactively influence lignin biosynthesis in oil flax stems require further investigation.Therefore,this study aimed to enhance lodging resistance and increase grain yield in oil flax.We examined the interactive effects of different nitrogen (75,150,and 225 kg N ha–1) and potassium (60 and 90 kg K2O ha–1) fertilizer rates on lignin metabolism,lodging resistance,and grain yield during the 2022 and 2023 growing seasons.Results indicated that nitrogen and potassium fertilizer levels and their interactions promoted lignin accumulation,improved lodging resistance,and increased grain yield.Compared to the control (CK),the75–150 kg N ha–1 combined with 60 kg K2O ha–1 treatments significantly enhanced the activities of key lignin-synthesizing enzymes (tyrosine ammonia-lyase (TAL),phenylalanine ammonia-lyase (PAL),cinnamyl alcohol dehydrogenase (CAD),and peroxidase (POD)) and upregulated the expression of 4CL1 and F5H3 genes,leading to a 29.63–43.30%increase in lignin content,improved stem bending strength and lodging resistance index,and a 23.27–32.34%increase in grain yield.Correlation analysis revealed that nitrogen and potassium fertilizers positively regulated enzyme activities and gene expression related to lignin biosynthesis,thereby facilitating lignin accumulation and enhancing stem mechanical strength and lodging resistance.Positive correlations were observed among lignin-related enzyme activities,gene expression,lodging resistance traits,and grain yield.In summary,the application of 75–150 kg N ha–1 in conjunction with 60 kg K2O ha–1promoted lignin biosynthesis and accumulation,enhanced lodging resistance,and increased grain yield in oil flax grown in the dryland farming region of central Gansu,China.Furthermore,this treatment provides a technical basis for cultivating stress-tolerant and high-yield oil flax in arid regions.
基金research support from the National Natural Science Foundation of China(M2142005)the Inner Mongolia Science and Technology Major Project,China(2021ZD0003)。
摘要Farmers in China often use nitrogen(N)fertilizers to ensure adequate crop growth.However,inappropriate applications have increased the risk of environmental pollution,lowered maize yields,and reduced profits for farmers.Proper N fertilizer management is crucial for improving yield and nitrogen use efficiency(NUE).This study conducted a three-year experiment involving nine N treatments(0,45,90,135,180,225,270,315,and 360 kg ha-1)on a field under nitrogen fertilizer precision management(NFPM)in Northeast China.The results were compared with studies published within the past decade that analyzed yield and dry matter(DM)content under two management practices in Northeast China:conventional nitrogen fertilization management(CNFM)and water-saving fertilization management(WSFM).The findings reveal that maize yield increases with rising N application rates up to 270 kg ha-1,after which yield decreases.The kernel number(KN)and kernel weight(KW)of maize grown under NFPM were 13.7 and 14.7%higher than those grown under WSFM,respectively.Furthermore,they surpassed crops grown under CNFM by 38.4 and 21.2%,respectively.The maximum total yield of the NFPM treatment was 41.8 and 78.8%higher than under WSFM and CNFM,respectively.In addition,compared with CNFM and WSFM,NFPM significantly increased NUE across the various N-level treatments.Optimizing nitrogen management can help farmers to achieve higher yields and promote sustainable agricultural development.
基金supported by the National Key Research and Development Program of China(2023YFD2301300 and 2022YFD2301404-4)the Sanya Yazhou Bay Science and Technology City Project,China(SKJC-2023-02-004)。
摘要Single-time fertilization(STF)with controlled release blended fertilizer(CRBF)improves grain yield and nitrogen use efficiency(NUE)in rice production.However,the impact of soil nitrogen(N)distribution and root growth on rice yield and NUE under STF with CRBF remains unclear.Here,a two-year field experiment investigated the effects of two fertilizer types(normal urea(U)and CRBF)and two single-time fertilization methods(broadcast and side-deep fertilization)on the soil N distribution,plant N uptake,root characteristics,grain yield,and NUE.The results showed that CRBF under STF increased the averages of plant dry matter accumulation,N uptake,grain yield,nitrogen recovery efficiency(NRE),and nitrogen agronomic efficiency(NAE)by 8.29,21.85,10.57,79.28,and 74.8%compared to the other treatments,respectively.Side-deep fertilization with CRBF further increased NUE by 12.78%compared to broadcast.Moreover,CRBF under STF increased the leaf SPAD value and glutamine synthetase(GS)/glutamine oxoglutarate aminotransferase(GOGAT)activity by 5.93 and 25.58%,respectively.CRBF under STF increased the soil inorganic N concentration and showed a“rising early and stabilizing later”pattern.In addition,CRBF under STF improved rice root growth and increased the averages of root biomass,total root number,root average diameter,total root length,total root surface area,and total root volume by 28.30,28.56,18.64,13.38,35.26,and 37.06%,respectively,at the tillering and heading stages.Partial least squares path modeling indicated that CRBF under STF increased the soil inorganic N concentration which improved root morphology,thereby increasing N uptake and improving the rice yield and NUE.Taken together,our findings show that CRBF with single-time fertilization is the preferred N fertilizer strategy for achieving high yield and efficiency in rice,and that side-deep fertilization is the optimal fertilization method.
基金supported by the National Key R&D Program of China(2023YFD2301404)the Natural Science Foundation of Hunan Province(2024JJ8071+2 种基金2023JJ50463)the Scientific Research Project of the Education Department of Hunan Province(24C1026)the University-Level Scientific Research Project of Hunan Biological and Electromechanical Polytechnic(25YYB15).
摘要To clarify the remediation effect of microbial inoculant fertilizer on cadmium(Cd)pollution following the application of pig manure organic fertilizer,a field experiment was conducted.No fertilization(CK1)and conventional fertilization(CK2)were used as controls.The treatments included conventional fertilization+pig manure organic fertilizer(PM,2800 kg/hm2)and four levels of microbial inoculant fertilizer(7.5,15,22.5,30 L/hm2)combined with the PM treatment.The study compared the effects of different treatments on rice economic traits,yield,Cd content in grains and plants,soil available Cd,total Cd,soil pH,and soil enzyme activities.The results showed that conventional fertilization+pig manure organic fertilizer significantly increased the effective panicle number per hectare and yield of rice.However,it concurrently led to a significant increase in rice grain Cd content,soil available Cd,and total Cd by 26.08%,13.35%,and 16.67%,respectively.Membership function analysis for comprehensive evaluation of economic traits and quality indicated that the treatment with 70%chemical fertilizer+pig manure organic fertilizer received the highest score.Compared with the application of pig manure organic fertilizer alone,the combined application of microbial inoculant fertilizer and pig manure organic fertilizer reduced rice grain Cd content,plant Cd content,total soil Cd,and available Cd by 20.50%~28.42%,4.48%~12.54%,4.98%~10.25%,and 43.28%~49.59%,respectively.Further analysis revealed that the combined application increased soil pH by 0.10~0.24 units,and enhanced the activities of soil sucrase,catalase,urease,and alkaline phosphatase by 7.49%~17.85%,4.19%~10.18%,0.39%~15.69%,and 16.35%~48.08%,respectively.Based on the comprehensive score from principal component analysis,the treatment with microbial inoculant fertilizer at 15 L/hm2+pig manure organic fertilizer+70%chemical fertilizer achieved the highest score.Considering the production economic value,the fertilization model of microbial inoculant fertilizer at 15 L/hm2+pig manure organic fertilizer+70%chemical fertilizer is recommended for application and promotion in local production.
基金supported by the National Natural Science Foundation of China(No.22376186)Zhejiang Provincial Natural Science Foundation of China(No.LY22E080009)+1 种基金the GDAS’Project of Science and Technology Development(No.2019GDASYL-0102005)Guangdong Foundation for Program of Science and Technology Research(No.2023B1212060044).
摘要Phosphorus is one of the main contributors to the eutrophication of water bodies;therefore,phosphorus recycling from agricultural wastewater represents a synergistic approach to achieve both phosphorus management and effective resource use.However,the specific removal pathway remains to be optimized.This study investigated the adsorption effect of lanthanum-modified biochar(La-BC)made from agricultural waste on dissolved phosphorus(DP).The maximum unit adsorption capacity of La-BC reached 41.09 mg P/g,representing a 215.35%increase compared to the original biochar(BC)(C 0:500 mg/L;pH:7).Further,the removal effect of La-BC on agricultural non-point source pollutants with different particulate phosphorus(PP)percentages was investigated through dynamic interception and adsorption simulation experiments.The results showed that PP was mostly intercepted by quartz sand while DP was mainly adsorbed by La-BC.Thus,La-BC could effectively remove DP and PP from agricultural wastewater and delay the adsorption depletion point of the dynamic adsorption device,subsequently prolonging its service life.Finally,the agricultural availability of La-BC after adsorption and filtration(La-BC-P)was further explored by soil and plant cultivation.The results indicated that La-BC-P with adsorption interception of fertilizer distribution water had higher plant availability.A higher DP percentage increased the beneficial effects on soil nutrients(available phosphorus increased by 12–16-fold)and plant growth(plant fresh weight increased by 33%).This study innovatively verified the technical feasibility of the"agricultural waste-agricultural non-point source pollution treatment-carbon-based fertilizer"recycling model based on the characteristics of agricultural source wastewater.
基金supported by the National Key Research and Development Program of China(2021YFD1901102,2023YFD2302100)the National Natural Science Foundation of China(32372236,32401970)+1 种基金the Postdoctoral Science Foundation(2024M751915)the Natural Science Basic Research Plan in Shaanxi province(2023-JC-YB-185)。
摘要Nitrogen(N)fertilizer deep placement has been widely adopted to improve nutrient use efficiency and maize yield in the semiarid regions of northwest China.However,previous studies on optimal fertilization depth have yielded inconsistent results across climate conditions,limiting its practical application.This study aims to determine the site-specific optimal N fertilization depth for spring maize by evaluating photosynthetic growth dynamics,yield formation,and N utilization in two contrasting semiarid regions.A two-year(2021-2022)field experiment was conducted in Dingxi(semiarid drought-prone region)and Jingning(typical semiarid region),with five fertilization depths:0 cm(D0),5 cm(D5),15 cm(D15),25 cm(D25),and 35 cm(D35).A 15N-labeled urea micro-plot experiment was additionally conducted to trace N fate.The results demonstrated that,compared with the conventional N placement treatment(D15),D25increased soil total N storage,net photosynthetic rate,root bleeding rate,and the concentrations of NO3--N and NH4+-N in the bleeding sap.PLS-PM analysis revealed that fertilization depths that are excessively deep(D35)or shallow(D0,D5,D15)adversely affect the photosynthetic parameters and root activity of maize,thereby inhibiting dry matter accumulation and grain N uptake,which ultimately reduces both yield and nitrogen use efficiency(NUE).Compared with D15,D25 increased grain yield,and NUE by8.79% and 33.19% at Dingxi,and by 7.11%and 11.25% at Jingning.15N isotope tracing revealed that D25 improved maize N uptake while reducing residual soil N and N losses.Regression analysis indicates regional differences in the optimal N application depth.To achieve the lowest N residual loss and the highest yield and NUE,Dingxi(23.49 cm)requires a deeper fertilization depth compared to Jingning(21.64 cm).In conclusion,N fertilizer deep placement is a viable strategy for enhancing agricultural productivity and efficiency in semiarid regions,but the appropriate depth should be selected based on local conditions.
基金supported by the National Natural Science Foundation of China(31871541)Earmarked Fund for China Agriculture Research System(CARS-01)。
摘要Extremely high temperatures(HT)caused by global warming pose serious threats to rice production.Potassium(K)is critical for plant stress tolerance,but its role in mitigating heat damage remains unclear.This study aimed to elucidate how high panicle K application affects mid-season rice HT tolerance in central China.A two-year field experiment grew two rice cultivars(heat-resistant Shanyou 63,SY63;heatsensitive Liangyoupeijiu,LYPJ)under varying sowing dates and two K application levels(low K,LK,50 kg K ha-1;high K,HK,90 kg K ha-1)at the panicle initiation stage.Sowing date l(S1)and sowing date 2(S2)increased the risk of heat stress exposure.Compared with late sowing(S3)under LK,early sowing reduced the yield in LYPJ by 41,3%(S1)and 51.3%(S2)in 2022,and by 35.4%(S2)in 2023,but did not affect the yield in SY63.Compared with LK in the same sowing date,HK increased yield by 44.7%(S1)and 61.5%(S2)in LYPJ in 2022,and by 30.6%(S2)in 2023,whereas it showed no significant effect on SY63 yield.Structural equation modeling analysis indicated that the yield loss could be primarily attributed to heat intensity at the panicle initiation and maturity stages.HK increased stomatal conductance and improved leaf water potential,thereby reducing canopy temperature by 1,2-1.3℃at heading and 1.1-2.5℃at maturity.Concurrently,HK enhanced carbohydrate supply and elevated enzyme activity for sugars utilization in anthers,collectively enhancing pollen viability and spikelet fertility.HK optimized source-sink traits via increasing leaf area index,specific leaf weight,spikelets per unit leaf area,post-anthesis translocation of stem dry matter(47.5%-48.9% in 2022 and 24.0% in 2023),and postanthesis dry matter accumulation(33.0%-38.2% in 2022 and 19.0% in 2023).The study indicates that early sowing increases the risk of heat stress exposure for mid-season rice in central China,and the increase of panicle K application can mitigate yield loss by lessening canopy temperature and optimizing source-sink relationships.
基金supported by the projects of the National Key Research and Development Program of China(2022YFD2301404,2023YFD2300202)the National Natural Science Foundation of China(32372224,32021004,32030076,and 32172116)+2 种基金the Key Research and Development Program of Jiangsu Province(BE2022308)the China Agriculture Research System(CARS-03)the Jiangsu Collaborative Innovation Center for Modern Crop Production(JCIC-MCP)。
摘要The objective of this study was to identify the suitable blended controlled-release nitrogen(N)fertilizer strategies(BCRNFs)for soft wheat production and to elucidate its underlying physiological mechanisms.A two-year field experiment conducted at two sites using two N application rates and three N fertilizer types.In each N rate,the N fertilizer types include:CK,common urea applied twice;BCRNF1,which featured a single basal application of a 3:2 blend of 60-d and 180-d controlled-release N fertilizers,aiming to delay N release until later growth stages;BCRNF2,which featured a single basal application of 3:4:3 blend of urea,60-d,and 180-d controlled-release N fertilizer,aiming to release N from early to middle growth stages.Compared with CK,BCRNF2 promoted starch synthesis and sucrose supply during the late grain-filling period of soft wheat,thereby increasing starch and amylose contents as well as the amyloseto-amylopectin ratio,while diluting protein and its component contents.The changes in these parameters mediated by BCRNF2 directly increased peak viscosity,trough viscosity,breakdown viscosity,final viscosity,and setback viscosity,ultimately improving soft wheat quality.BCRNF1 under reduced N application enhanced sucrose transport and starch synthesis capacity during the late growth period,which similarly supported the increase in starch content,the decrease in protein content,and the improvement of some key pasting characteristics.Therefore,BCRNF1 under reduced N conditions and BCRNF2 under conventional N conditions can enhance final grain quality and processing quality by increasing carbon metabolism during soft wheat grain filling,making them suitable for soft wheat production.
基金supported by the Sanya Yazhou Bay Science and Technology City Administration (SKJC-2023-02-004)the Key R&D Program of Hainan Province (Science and Technology Commissioner) (ZDYF2024KJTPY009)+1 种基金the National Key Research and Development Program of China (2023YFD2301300, a joint program across multiple provinces including Jiangxi)the Youth Fund of the Natural Science Foundation of Jiangsu Province (BK20241545)。
摘要The objective of this study was to identify an application strategy for a blend of two controlled-release nitrogen fertilizers(CRNFs) that optimized yield and N-use efficiency of late japonica rice in the Yangtze River Delta. In a two-year field experiment using high-yield split-applied urea(CK) and no-N fertilization as control(N0), nine CRNF treatments were evaluated for their effects on grain yield, N uptake(NUP), soil ammonium nitrogen(NH4+-N) dynamics, and ammonia volatilization(AV). The treatments included sulfur-coated urea(SCU), urease inhibitor urea(AHA), 90-d polymer-coated urea(P90), 120-d polymer-coated urea(P120), and five BBFs prepared by mixing CRNFs at a 3:7 ratio(AHAP90, SP90,AHAP120, SP120, and P90P120). Based on N release characteristics, CRNFs were categorized into four release modes: pre-positioned single-peak(PrSRM), post-positioned single-peak(PoSRM), decreasing double-peak(DDRM), and increasing double-peak(IDRM). Synchronization between soil NH4+-N dynamics under CRNFs and plant N uptake rate(NUPR) under CK was quantified using dynamic time warping(DTW), with smaller values indicating higher synchrony. Results showed that single-peak release modes significantly reduced grain yield and NUP by 12.6% and 10.5%, respectively. The IDRM treatment, a blend of 90-d and 120-d polymer-coated urea, showed NH4+-N supply dynamics most closely matching the N demand of high-yielding rice, with lower two-year average DTW values(SSRDTW 1.01, NUPSDTW1.72) than DDRM(1.03 and 2.00), which translated into increases in spikelet number, grain yield, and NUP by 4.49%,6.03%, and 4.85%, respectively, while decreasing AV by 86.7% compared with CK. One-time application of IDRM fertilizer can align soil NH4+-N supply with rice N demand, ensure high yield, and reduce N losses,providing an optimized fertilization strategy for sustainable rice production in the Yangtze River Delta.
基金supported by the Earmarked Fund for China Agriculture Research System(CARS-14-1-16)the National Natural Science Foundation of China(32260551)+2 种基金the Research Program Sponsored by Gansu Provincial Key Laboratory of Aridland Crop Science,Gansu Agricultural University,China(GSCS-2020-Z6)the Technology Innovation Guidance Program Science and Technology Mission Topic of Gansu Province,China(23CXNA0035)the Gansu Education Science and Technology Innovation Industry Support Program,China(2021CYZC-38)。
摘要Soil aggregates highly regulate nitrogen(N)turnover,yet their functions in regulating N retention under long-term crop rotation remain unclear.This study used15N-labeled fertilizer N to investigate how different-sized soil aggregates regulate fertilizer N retention and redistribution under long-term crop rotation systems.The results revealed that large macroaggregates exhibited a more pronounced depletion of fertilizer N(enrichment factor,Ef:0.73-0.95)than of total N(Ef:0.93-1.00).In contrast,macroaggregates and microaggregates enriched fertilizer N(Ef:1.00-1.16).Crucially,we found a temporal divergence:after harvest(with new15N-labeled fertilizer application),macroaggregates preferentially sequestered new N(current-season fertilizer N),whereas microaggregates dominated the stabilization of old N(previous-year fertilizer N)in the absence of15N-labeled fertilizer in 2024.This functional specialization is driven by aggregate turnover,whereby disintegrating macroaggregates release old N for stabilization in microaggregates,while reforming macroaggregates encapsulate new N.The accelerated release of fertilizer N from these macroaggregates during crop cultivation supplies N to crops,while their reformation concurrently enriches new N.This process underscores the dual functions of macroaggregates in both supplying N to crops and enriching new N.Ultimately,crop rotations reinforce this beneficial dynamic by restructuring soil aggregation,leading to a marked expansion of the soil N pool,with fertilizer N storage increasing by 27.11-111.68%and total N storage by 2.94-14.22%compared to continuous cropping.Our findings establish the functional heterogeneity of soil aggregates as a key mechanism for long-term fertilizer N retention and stabilization.This provides a mechanistic basis for optimizing N management under crop rotations.
基金sponsored by National Key R&D Program,China(2022YFD1900200 and 2022YFD1900300)Central Public-interest Scientific Institution Basal Research Fund,China(BSRF202409).
摘要This study investigated the effectiveness of manure-based slurry film(MSF)technology and validated its dual benefits in reducing mineral fertilizer input and enhancing fertilizer use efficiency through field experiments.The results showed that MSF maintained silage maize yield while reducing mineral fertilizer input by 30%,and achieved a significant yield increase under 15%reduction in fertilizer input compared to standard polyethylene film.An investigation of soil microorganisms demonstrated that MSF changed the microbial community structure,promoting the activation and use efficiency of nutrients such as nitrogen,phosphorus and potassium,while increasing soil organic matter content.Life cycle assessment was performed with SimaPro 9.5 revealing that the environmental impact of MSF is significantly greater than that of polyethylene film across various environmental assessment factors.The high environmental impact of MSF production stems from its energy and water consumption,necessitating a focus on process simplification while maintaining high yield.This study provides new insights into the development of cleaner technologies,examines diversified uses of cow manure,emphasizes the role of MSF in reducing mineral fertilizer application,and highlights potential environmental risks.
基金supported by the Office Chérifien des Phosphates(OCP)Foundation,Morocco(No.AS110)the OCP Foundation+3 种基金OCP InnovationMohammedⅥPolytechnic University(UM6P)Centre National pour la Recherche Scientifique et Technique(CNRST)Ministre de l’Enseignement Supérieur,de la Recherche Scientifique et de l’Innovation(MESRSFC),Morocco。
摘要The potential of hydroxyapatite(HA)nanoparticles as an alternative fertilizer has been extensively explored to mitigate the negative effects of conventional fertilizers on soil health.However,their low solubility in soil remains a significant challenge as this property reduces their efficiency for controlled nutrient delivery.To address this challenge,organic-inorganic nanocomposites,particularly HA-biopolymer-based nanofertilizers,have been proposed.These biocomposites combine the nutrient-rich feature of HA with the improved solubility and controlled-release ability provided by biopolymers,while also enhancing soil interaction to ensure more efficient and sustainable fertilization.The polymeric phase plays a key role in nutrient solubilization kinetics by facilitating microbial release,minimizing the need for frequent application,and reducing the toxicity to plants,which altogether reduces the overall environmental implications of fertilizer application.Despite recent advances,several key scientific gaps remain unaddressed,including the optimization of synthesis methods,the role of polymer composition in nutrient release kinetics,and the long-term effects of these nanofertilizers on soil health and plant productivity.This review provides a comprehensive analysis of the recent progress and prospects for HA-based nanofertilizers,emphasizing synthesis techniques,structural properties,and performance in soil environments.Additionally,it highlights the need for tailored approaches to optimize nutrient release profiles,ensuring sustained nutrient availability,reduced environmental impact,and enhanced agricultural productivity.By identifying these knowledge gaps,this review aims to guide future research toward the design of next-generation HA-biopolymer nanocomposites with improved efficiency and sustainability compared to existing ones.
基金supported by the National Key Research and Development Program of China(2024YFD1900101)the National Natural Science Foundation of China(42477364 and 42207398)+1 种基金the Hengyang Station,Chinese Agrosystem Long-Term Observation Network(CALTON-HY)the Jinggang Mountains Agricultural High-tech District Provincial Special Science and Technology,China(20222-051246)。
摘要Lime application represents an established approach for ameliorating soil acidity,and understanding its effects on the interactions between aluminum(Al)and iron(Fe)oxides and soil organic carbon(SOC)fractions is essential for promoting sustainable agricultural practices that enhance carbon sequestration.This investigation examined the interactions among Al and Fe oxides and SOC fractions under long-term fertilization and liming.A long-term field experiment was implemented with five treatments:CK(no fertilizer),N(nitrogen fertilizer),NCa(N plus lime),NPK(nitrogen,phosphorus,and potassium fertilizer),and NPKCa(NPK plus lime).Soil samples were obtained from three depths:0-10,10-20,and 20-30 cm.The findings revealed that lime application increased SOC by 20.84%under the N treatment but decreased SOC by 9.97%under NPK.At the 0-10 cm depth,dissolved organic carbon(DOC)was substantially higher under NCa(410.51 mg kg-1)and NPKCa(372.83 mg kg-1)compared with CK.Particulate organic carbon(POC)and mineral-associated organic carbon(MAOC)demonstrated consistent enhancement under NPK and NPKCa across all soil depths compared with CK.DOC exhibited significant positive correlations with both aluminum(Ald),reactive aluminum(Alo)and aluminum(Alp),indicating a key role of organically bound and reactive Al in carbon dynamics.Compared to the CK treatment,SOC stock increased significantly by 43.49%under NPK and by 36.82%under NPKCa.Structural equation modeling demonstrated that lime application mitigated the negative effects of free Al(Ald)on carbon sequestration,while Fe oxides(Fed)contributed positively to SOC stabilization.DOC showed no significant impact on carbon sequestration rate(CSR),while easily oxidizable carbon(EOC)negatively affected CSR directly.These results highlight the crucial role of lime in improving acidic soil conditions and enhancing the stability and sequestration of soil organic carbon.
基金supported by projects of the National Key Research and Development Program of China(2023YFD2300202)the Key Research and Development Program of Jiangsu Province,China(BE2022308)+2 种基金the National Natural Science Foundation of China(32372224,32021004,32030076,and 32172116)the China Agriculture Research System(CARS-03)the Collaborative Innovation Center for Modern Crop Production co-sponsored by Province and Ministry,China(CIC-MCP)。
摘要The application of slow-controlled release fertilizer is a simple and labor-saving cultivation technology that can improve the yield and nitrogen use efficiency(NUE)of wheat,although research on the impact of a single application of controlledrelease nitrogen(N)fertilizers with different release periods on wheat grain quality is still limited.In this study,urease inhibitor urea(AHA),sulfur-coated urea(SCU),a combination of SCU and AHA fertilizer(BSAF)and blended slowcontrolled release fertilizer(BRNF)were used to investigate the effect of slow-controlled release fertilizers on the nutrient release,grain yield,NUE,and protein content of soft wheat.The goal was to determine the effect of a one-time application of controlled release fertilizer on wheat grain yield and protein content and its underlying mechanisms.The results showed that the different slow-controlled release fertilizer treatments had significantly different N release rates.AHA presented a fast release mode,while SCU and BSAF presented slow-release modes,and BRNF presented a controlled release mode.Compared with CK,BRNF increased grain yield and reduced the protein content of soft wheat,with an average increase of 6.73%in grain yield and a reduction of 1.85%in protein content.The higher N absorption of BRNF led to greater NUE,N agronomic efficiency(NAE)and N apparent recovery fraction(NRF).However,AHA,SCU and BSAF all showed the opposite trend.Compared with CK,BRNF improved post-anthesis dry matter accumulation(PDMA)and the contribution rate of dry matter accumulated post-anthesis to the grain(CDA),while reducing post-anthesis N accumulation(PNA)and the contribution rate of post-anthesis N accumulation to grain(CNA).The main reasons for the improvement in yield and reduction in protein content were related to the increases in PDMA and CDA,and the reductions in PNA and CNA,respectively.Therefore,BRNF is an effective agronomic strategy for promoting the coordination of grain yield and quality in soft wheat.
基金supported by the Key-Area Research and Development Program of Guangdong Province,China(No.2020B1111380001)Beijing Natural Science Foundation,China(No.JQ24053)+1 种基金the National Natural Science Foundation of China(Nos.52070116 and52276202)Beijing Municipal Natural Science Foundation,China(No.2222012)。
摘要Hydrothermal cracking converts biomass waste into superior organic fertilizer by hydrolyzing it at temperatures of 180–220℃ and pressures of 1.5–2.45 MPa,enhancing treatment efficiency and nutritional value.Most of the research on hydrothermal cracking solid organic fertilizer(HCSOF)has been centered on its characterization and fertilizer properties;however,research is scarce regarding its greenhouse gas emissions and toxic metals(TMs).This study assesses the carbon and nitrogen retention rate and TMs of industrial HCSOF.Specifically,environmental impact was evaluated using indicators such as hazard quotient(HQ)and risk assessment code(RAC),with planting experiments conducted to assess TM's effect on soil and plants.The results indicate that industrial HCSOF has a high fixed carbon rate of up to 91.2%and a fixed nitrogen rate of 98.40%,manifesting the potential for reducing greenhouse gas emissions.Additionally,HCSOF contains high ecological safety of TMs such as Hg(HQ=0.008,RAC=0%),As(HQ=0.055,RAC=37.08%),Cd(HQ=0.708,RAC=1.76%),Pb(HQ=0.176,RAC=0.87%),and Cr(HQ=0.853,RAC=0.12%).After being applied to sandy soil,15,000 kg/ha of HCSOF can increase the organic matter and nutrients in both soil and maize straw,reducing TMs and their ecological risks.By obtaining a deeper understanding of the composition and practical application of industrial HCSOF,valuable insights can be offered to reduce greenhouse gas emissions and eliminate potential risks associated with TM pollution.
基金supported by project OLP116.CSIR-NBRI allotted the manuscript number CSIR-NBRI_MS/2025/06/15。
摘要The excessive reliance on chemical inputs for managing soil nutrients and pathogens has raised concerns about their long-term sustainability and environmental impact.In contrast,the use of soil microbes offers an eco-friendly and efficient alternative for improving soil fertility and plant growth.Beneficial microorganisms,including plant growth-promoting rhizobacteria(PGPR),mycorrhizal fungi,and other soil organisms,play pivotal roles in nutrient cycling,organic matter decomposition,and nutrient availability improvement.This review explores the potential of leveraging microbial resources for sustainable soil nutrient management and resilient crop production.It delves into the intricate interactions between host plants and PGPR,particularly under nutrient-limited and fluctuating environmental conditions,with a focus on the molecular signaling pathways and mechanisms regulating these relationships.Furthermore,it emphasizes the role of advanced techniques and PGPR-responsive microRNAs to uncover the functional capabilities of microbial communities and their dynamic interactions with plants.These approaches pave the way for developing innovative,microbe-based strategies to optimize nutrient use efficiency,reduce dependency on synthetic fertilizers,and support sustainable agricultural practices.