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Is intra-household nutrient allocation equitable?Evidence from asymmetric expenditure responses in rural China 认领 引用
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作者 Yang Gao Zhihao Zheng Ning Li 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2026年第7期3074-3085,共12页
To analyze intra-household nutrient allocation,we examine the differences in expenditure elasticities across demographic groups within rural households,employing an asymmetric model along with data from the China Heal... To analyze intra-household nutrient allocation,we examine the differences in expenditure elasticities across demographic groups within rural households,employing an asymmetric model along with data from the China Health and Nutrition Survey(CHNS)from 2004 to 2011.Our analysis reveals significant heterogeneity in household nutrient allocation:during periods of expenditure expansion,households prioritize the nutritional intake of vulnerable members,specifically children and the elderly,often at the expense of prime-age adults,particularly women.Conversely,during expenditure contraction,households shift strategies to protect the nutritional intake of prime-age adults.This asymmetry underscores the complexity of intra-household distribution and provides critical insights for designing nutrition security policies that account for economic volatility. 展开更多
关键词 intra-household nutrient allocation asymmetric model diet variety nutrient adequacy ratio rural China
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Decoding the cellular symphony of leaf senescence and nutrient allocation 认领 引用
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作者 Yuan Yu Cao Xu 《Seed Biology》 2025年第1期178-180,共3页
Leaf senescence,the final stage of leaf development,is a tightly regulated process that enables plants to recycle nutrients from aging leaves to support reproductive growth and stress adaptation[1].This process involv... Leaf senescence,the final stage of leaf development,is a tightly regulated process that enables plants to recycle nutrients from aging leaves to support reproductive growth and stress adaptation[1].This process involves intricate coordination among diverse cell types and transcriptional networks,yet its spatiotemporal dynamics at single-cell resolution remain poorly understood.Traditional single-cell RNA sequencing(scRNA-seq)approaches in plants have been limited by technical challenges,including protoplastinginduced stress artifacts and difficulties in profiling mature or senescing tissues[2−4]. 展开更多
关键词 transcriptional networks leaf senescencethe leaf developmentis recycle nutrients single cell RNA sequencing cell types nutrient allocation spatiotemporal dynamics
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Aboveground biomass and nutrient allocation in an age-sequence of Larix olgensis plantations 认领 引用 被引量：4
3
作者 ZHAO Qiong LIU Xing-yu ZENG De-hui 《Journal of Forestry Research》 CAS CSCD 2011年第1期71-76,共6页
Biomass and nutrient （N, P, K, Ca, Mg） stock in various aboveground tree components （stemwood, stembark, branches and leaves） were quantified in an age sequence of pure Larix olgensis plantations （20, 35, 53 and ... Biomass and nutrient （N, P, K, Ca, Mg） stock in various aboveground tree components （stemwood, stembark, branches and leaves） were quantified in an age sequence of pure Larix olgensis plantations （20, 35, 53 and 69 years old） in Northeast China. The results show that the aboveground biomass allocation in various tree components was in the order of stemwood （62%-83%）, branches （9%-21%）, stembark （7%-11%） and leaves （1%-6%） for all stands. The proportion of stemwood biomass to total aboveground biomass increased whereas that of other tree components decreased consistently with stand age from 20 to 53 years old, but kept relatively constant with stand age from 53 and 69 years old. The nutrient allocation in various tree components generally followed the same pattern as the biomass allocation （i.e. stemwood 〉 branches 〉 stembark 〉 leaves）. The proportion of nutrient stock in leaves to total aboveground nutrient stock decreased consistently with increasing stand age, while that in stemwood increased with stand age from 20 to 53 years old but then decreased from 53 to 69 years old. The rate of nutrient removal for stands was estimated at different stand ages under different logging schemes, showing that the rate of nutrient removal would be unchanged when the rotation length was shortened to 20 years by the harvest of stem only, but greatly increased by the harvest of total aboveground biomass. The rate of nutrient removal would be a considerable reduction for all elements by debarking, especially for Ca. 展开更多
关键词 Larix olgensis nutrient allocation stand development nutrient removal
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Variation in carbon,nitrogen and phosphorus partitioning between above-and belowground biomass along a precipitation gradient at Tibetan Plateau 认领 引用 被引量：6
4
作者 HONG Jiang-tao WANG Xiao-dan WU Jian-bo 《Journal of Mountain Science》 SCIE CSCD 2016年第4期661-671,共11页
Precipitation is a potential factor that significantly affects plant nutrient pools by influencing biomass sizes and nutrient concentrations. However, few studies have explicitly dissected carbon(C), nitrogen(N) and p... Precipitation is a potential factor that significantly affects plant nutrient pools by influencing biomass sizes and nutrient concentrations. However, few studies have explicitly dissected carbon(C), nitrogen(N) and phosphorus(P) pools between above- and belowground biomass at the community level along a precipitation gradient. We conducted a transect(approx. 1300 km long) study of Stipa purpurea community in alpine steppe on the Tibet Plateau of China to test the variation of N pool of aboveground biomass/N pool of belowground biomass(AB/BB N) and P pool of aboveground biomass/P pool of belowground biomass(AB/BB P) along a precipitation gradient. The proportion of aboveground biomass decreased significantly from mesic to drier sites. Along the belt transect, the plant N concentration was relatively stable; thus, AB/BB N increased with moisture due to the major influences by above- and belowground biomass allocation. However, P concentration of aboveground biomass decreased significantly with increasing precipitation and AB/BB P did not vary with aridity because of the offset effect of the P concentration and biomass allocation. Precipitation gradients do decouple the N and P pool of a S. purpurea community along a precipitation gradient in alpine steppe. The decreasing of N:P in aboveground biomass in drier regions may indicate much stronger N limitation in more arid area. 展开更多
关键词 Biomass allocation Nutrient concentration Qinghai-Tibetan Plateau Alpine steppe Stipa purpurea
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