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戈壁梭梭(Haloxylon ammodendron)防风效能风洞模拟 认领 引用
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作者 张雪 王海兵 +2 位作者 廖承贤 杨皓钦 白云菲 《中国沙漠》 CSCD 北大核心 2026年第1期242-251,共10页
分析戈壁砾石盖度与不同梭梭(Haloxylon ammodendron)配置复合作用下的防风效能,可以为戈壁地区防风固沙林建设提供理论依据。本文对不同风速作用下2种砾石盖度(6.53%和43.96%)、2种林带高度(15 cm和30 cm)结合3种林带配置模式(单行、... 分析戈壁砾石盖度与不同梭梭(Haloxylon ammodendron)配置复合作用下的防风效能,可以为戈壁地区防风固沙林建设提供理论依据。本文对不同风速作用下2种砾石盖度(6.53%和43.96%)、2种林带高度(15 cm和30 cm)结合3种林带配置模式(单行、两行、三行配置)梭梭林的流场变化规律进行了风洞模拟试验。结果表明:15 cm和30 cm高度梭梭林带的流场结构相似,均在梭梭高度范围内对气流有削减作用;同一砾石盖度下三行梭梭配置的流场风影区面积及风影区存在距离均大于单行和两行梭梭配置;砾石盖度43.69%和30 cm高度梭梭林带组合较其他组合的等风速线抬升幅度明显增加;单行、两行、三行梭梭配置防风效能在背风侧0~2倍株高处达到最大值后逐渐减小,最大平均防风效能分别为23.9%、37.85%和45.4%,梭梭高度增加林带背风侧3倍株高处防风效能出现抬升现象,从而延伸防护距离。 展开更多
关键词 戈壁 梭梭(Haloxylon ammodendron) 风速流场 防风效能 风洞模拟
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固沙植物梭梭(Haloxylon ammodendron)对风沙流场影响的数值模拟 认领 引用
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作者 胡广录 何娜娜 +4 位作者 张叶叶 陈坤 靳涛阳 王佳琦 田凯夫 《中国沙漠》 CSCD 北大核心 2026年第3期304-317,共14页
植物固沙是干旱、半干旱地区防治风沙灾害的重要措施,梭梭(Haloxylon ammodendron)作为干旱区典型的抗旱、耐盐碱、抗风蚀的荒漠植物,防风固沙效果显著,在黑河中游荒漠-绿洲过渡带被广泛栽植。本文通过Fluent计算平台对梭梭植物附近的... 植物固沙是干旱、半干旱地区防治风沙灾害的重要措施,梭梭(Haloxylon ammodendron)作为干旱区典型的抗旱、耐盐碱、抗风蚀的荒漠植物,防风固沙效果显著,在黑河中游荒漠-绿洲过渡带被广泛栽植。本文通过Fluent计算平台对梭梭植物附近的风沙流场进行三维数值模拟,分析梭梭周围风速特征和积沙特征,并利用野外试验数据进行验证。结果表明:(1)不同风速条件下,梭梭周围风沙流场均可形成4个分区,但各区流场结构尺度和扰动强度均存在显著差异。入口风速为6 m·s-1时,梭梭背风面存在3个涡流区,静风区范围可延伸至3H(H为株高),气流动能恢复较慢;而在12 m·s-1时,背风面仅有较弱的2个涡流区,静风区范围缩减至1.2H,动能恢复更快。(2)梭梭防风效果与其冠幅呈正相关关系,冠幅越宽,防风效果越好。梭梭不同位置处的防风效率总体表现为背风面>迎风面>侧风面,背风面风速降低50%~90%;迎风面风速降低30%~60%;而侧面风速降幅仅为10%~30%。(3)不同风速条件下,梭梭的阻沙能力显著不同。当入口风速为6m·s-1时,沙粒沉积在-0.75H~1H;而当风速增至12 m·s-1时,沙粒沉积在0~1H。(4)增加植株排数与优化行间距可提升梭梭植物的阻沙能力,其中梭梭行间距为5 m时整体阻沙效果最优。该研究结果可为黑河中游荒漠-绿洲过渡带土壤风蚀防治提供参考。 展开更多
关键词 梭梭(Haloxylon ammodendron) 防风固沙 数值模拟 风沙流场 沙粒体积分数
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巴丹吉林沙漠不同林龄梭梭(Haloxylon ammodendron)气体交换对增温的适应策略 认领 引用 被引量：6
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作者 杨杰 薛浩 +2 位作者 杨淇越 冯相艳 王玉哲 《中国沙漠》 CSCD 北大核心 2025年第1期195-203,共9页
随着全球变暖,气温持续升高,极端干旱气候水文事件频发,对全球(特别是干旱荒漠)地区生态系统造成不利影响。梭梭(Haloxylon ammodendron)具有极强的耐干旱高温的能力,在中国西北荒漠地区被广泛种植。探究不同林龄(5、10、20、30、40 a)... 随着全球变暖,气温持续升高,极端干旱气候水文事件频发,对全球(特别是干旱荒漠)地区生态系统造成不利影响。梭梭(Haloxylon ammodendron)具有极强的耐干旱高温的能力,在中国西北荒漠地区被广泛种植。探究不同林龄(5、10、20、30、40 a)梭梭光合生理和水分生理特征在极端高温下的适应策略,有助于预测梭梭未来在全球变暖(极端高温)条件下的生存境况。利用LI-6800F光合-荧光全自动测量系统测量梭梭温度光合响应曲线,依据IPCC发布的增温幅度,设置了25、27.5、30、32.5、35、37.5、40℃梯度模拟升温变化,分析不同林龄梭梭气体交换差异,利用1515D压力室仪器测量不同林龄梭梭同化枝水势。结果表明:(1)不同林龄梭梭同化枝水势有显著性差异,5~30 a梭梭水势随林龄增加而升高,40 a梭梭降低且略大于20 a梭梭。(2)随着温度升高,不同林龄梭梭光合特性有明显差异,5 a梭梭由于受到水分胁迫最严重,净光合速率(Pn)最小,10 a梭梭Pn呈线性增加,20、30、40 a梭梭Pn较高且随温度升高波动较小。不同林龄梭梭在极端高温(35~40℃)Pn持续升高(10 a)、保持稳定(20、30 a)或下降(5、40 a)。(3)不同林龄梭梭水分生理特征也有较大差异,特别在极端高温时的差异性与植物生存发展有紧密联系。中龄(20 a)幼龄梭梭(5、10 a)采取的水分利用策略较为保守,在极端高温时,气孔导度(Gs)、水分利用效率(WUE)、蒸腾速率(Tr)波动较小,且保持着较高的Pn,对极端高温环境抗逆性强;老龄梭梭(30、40 a)则采取较为激进的水分利用策略,在极端高温时仍然不断提高Tr致使WUE不断降低,虽然能保持较高的Pn,但是也可能导致树木生长受限,长此以往也可能导致树木的死亡。不同林龄梭梭在极端高温下的气体交换特征有着较大差异,对极端高温有着不同的适应策略,尤其老龄(30、40 a)梭梭的采取适应策略较为激进,未来在全球变化(特别在极端高温)情况下要重点监测老龄(30、40 a)梭梭种群。 展开更多
关键词 全球变暖 梭梭(Haloxylon ammodendron) 光合作用 水分利用效率 蒸腾速率
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人工梭梭(Haloxylon ammodendron)林建植对荒漠土壤特征的长期影响 认领 引用 被引量：3
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作者 周晓甘 罗永忠 +6 位作者 马全林 刘继亮 任嘉隆 王子婷 严祺涵 秦畅 翟家祺 《中国沙漠》 CSCD 北大核心 2025年第5期68-77,共10页
为探究干旱荒漠区人工固沙植被恢复过程对土壤特征的影响,以黑河中游张掖绿洲为研究区,选择流动、固定沙丘和不同栽植年限梭梭(Haloxylon ammodendron)林作为研究对象,分析土壤理化性质和植被因子特征及二者间的相关性。结果表明:(1)流... 为探究干旱荒漠区人工固沙植被恢复过程对土壤特征的影响,以黑河中游张掖绿洲为研究区,选择流动、固定沙丘和不同栽植年限梭梭(Haloxylon ammodendron)林作为研究对象,分析土壤理化性质和植被因子特征及二者间的相关性。结果表明:(1)流动和固定沙丘转变为人工梭梭林降低了土壤容重和细砂含量,提高了土壤粗砂含量,土壤黏粉粒含量在30年梭梭林大幅增加;(2)流动和固定沙丘转变为人工梭梭林降低了土壤pH,提高了土壤电导率并随着梭梭栽植年限的增加而增大;(3)流动和固定沙丘转变为人工梭梭林提高了土壤有机碳、全氮、全磷含量及电导率,并随着梭梭栽植年限的增加而增大;(4)灌木密度和盖度及草本物种丰富度是驱动人工梭梭林恢复过程中土壤环境变化的主要因子,三者解释了40.1%的土壤环境变异。综上,人工梭梭林建设引起的灌木盖度及密度增加会改善土壤环境并随着恢复年限的变化而变化,但也会导致土壤电导率增加和全氮含量下降,从而威胁人工梭梭林土壤健康与稳定。 展开更多
关键词 黑河中游 人工梭梭林 流动沙丘 固定沙丘 土壤理化性质
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风沙活动对人工梭梭(Haloxylon ammodendron)林土壤碳氮含量的影响 认领 引用 被引量：11
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作者 马全林 尚雯 +3 位作者 王新友 马婧 詹科杰 王多泽 《中国沙漠》 CSCD 北大核心 2022年第1期71-78,共8页
风沙活动及其物质输移是关键的陆地地表过程,对沙地生态系统影响显著。以石羊河下游民勤县不同林龄人工梭梭(Haloxylon ammodendron)林为研究对象,研究了固沙造林对0—1 m深度土壤碳氮含量的影响以及风蚀和降尘引起的碳氮含量变化特征,... 风沙活动及其物质输移是关键的陆地地表过程,对沙地生态系统影响显著。以石羊河下游民勤县不同林龄人工梭梭(Haloxylon ammodendron)林为研究对象,研究了固沙造林对0—1 m深度土壤碳氮含量的影响以及风蚀和降尘引起的碳氮含量变化特征,探讨了风沙活动对人工梭梭林土壤碳氮库的影响。结果表明:35 a人工梭梭林0—1 m和0—5 cm土壤有机碳储量较流动沙丘分别增长2.5倍和4.6倍,土壤氮储量分别增长3.3倍和5.3倍。地表风沙流被人工梭梭林截留引起的碳氮输入速率5年平均值分别为1.12 g∙m-2∙a-1和0.15 g∙m-2∙a-1,占35 a林地0—1 m土壤有机碳氮固定速率的2.2%和1.8%,占0—5 cm土壤有机碳氮固定速率的21.5%和24.9%。在人工梭梭林下垫面上,降尘引起的碳氮输入速率5年平均值分别为2.47 g∙m-2∙a-1和0.29 g∙m-2∙a-1,占到35 a林地0—1 m土壤有机碳氮固定速率的4.7%和3.5%,占0—5 cm土壤有机碳氮固定速率的45.7%和48.1%,是地表风沙流的近2倍。人工梭梭林对风沙流活动的削减作用显著促进了沙漠土壤有机碳氮的积累,在0—5 cm层更为明显。 展开更多
关键词 风蚀 降尘 人工梭梭(Haloxylon ammodendron)林 土壤有机碳 全氮
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Soil properties and herbaceous characteristics in an age sequence of Haloxylon ammodendron plantations in an oasis-desert ecotone of northwestern China 认领 引用 被引量：10
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作者 ZHANG Ke SU Yongzhong +1 位作者 WANG Ting LIU Tingna 《Journal of Arid Land》 SCIE CSCD 2016年第6期960-972,共13页
Haloxylon ammodendron, a typical desert shrub with C4 pathway of photosynthesis, possessing a strong ability to adapt to an extreme drought environment, has a rapid growth rate in sandy lands and is widely used in san... Haloxylon ammodendron, a typical desert shrub with C4 pathway of photosynthesis, possessing a strong ability to adapt to an extreme drought environment, has a rapid growth rate in sandy lands and is widely used in sand-fixing shelter-forest systems in oasis-desert ecotones. To assess the effects of H. ammodendron plantation on the soil, we measured soil properties and herbaceous characteristics along a nearly 40-year chronosequence after H. ammodendron was planted in shifting sand dunes in an oasis-desert ecotone. Results showed that silt and clay fractions increased significantly in the topsoil. The accumulation rates of soil organic carbon （SOC）, total nitrogen （TN） and total phosphorus （TP） were faster in the early stages （0-9 years） and slower in the late stages （9-39 years）. The soil pH and electrical conductivity （EC） were higher than those in the non-vegetation dunes. Moreover, the soil properties in the topsoil （0-5 cm） showed larger variation scope than those in the deeper soil layers （5-20 cm）. The significant relationships of the soil silt＋clay content with the chemical properties mainly appeared in the topsoil. The wind erosion susceptibility of the soil, evaluated by erodible fraction （EF）, decreased significantly with increasing H. ammodendron plantation age. Additionally, the annual pioneer herb, Agriophyllum squarrosum, was gradually substituted by the annual salt-tolerant herb, Bassia dasyphylla, with increasing plantation age. These results showed beneficial effects of H. ammodendron plantation on improving soil conditions. However, the dynamics of the herbaceous species also reminded us that the long- term effects of H. ammodendron plantation, especially on changes in vegetation composition, still need further evaluation. 展开更多
关键词 Haloxylon ammodendron soil properties herbaceous erodible fraction oasis-desert ecotone
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干旱区流动沙地建植梭梭(Haloxylon ammodendron)林后细粒物质输入对土壤碳氮积累的影响 认领 引用 被引量：15
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作者 安芳娇 苏永中 +1 位作者 牛子儒 刘婷娜 《中国沙漠》 CSCD 北大核心 2021年第5期147-156,共10页
在河西走廊中段临泽荒漠绿洲过渡带选择不同建植时间序列(0、3、6、11、19、28、46 a)的固沙梭梭(Haloxylon ammodendron)林,取冠层下和冠层外表层土样(0—10 cm),研究人工固沙梭梭林生长发育过程中土壤粒级组成和碳氮的变化,分析细粒... 在河西走廊中段临泽荒漠绿洲过渡带选择不同建植时间序列(0、3、6、11、19、28、46 a)的固沙梭梭(Haloxylon ammodendron)林,取冠层下和冠层外表层土样(0—10 cm),研究人工固沙梭梭林生长发育过程中土壤粒级组成和碳氮的变化,分析细粒物质变化对碳氮积累的贡献。结果表明:随着梭梭的生长发育土壤碳氮含量显著增加,无机碳(SIC)是有机碳(SOC)的2.7—11.2倍;黏粉粒和碳酸钙含量与土壤可侵蚀因子(EF)显著负相关,与结皮厚度显著正相关,冠层下结皮厚度是冠层外的1.9—2.6倍;土壤各粒级中SOC、SIC和全氮(TN)含量显著增加,黏粉粒中含量显著高于其他粒级,且对SOC、SIC和TN贡献由0 a的25.4%、8.5%和16.1%增至46 a的59.7%、33.9%和51.9%。干旱区土壤黏粉粒和碳酸钙含量的增加共同促进了土壤物理结皮的形成和发育,进而导致沙面的稳定,同时黏粉粒增加也是土壤碳氮固存的主要机制。 展开更多
关键词 固沙梭梭(Haloxylon ammodendron)林 固沙年限 颗粒组分 土壤碳氮固存 绿洲边缘
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基于SHAP值方法的乌拉特梭梭(Haloxylon ammodendron)林保护区土壤表层碳氮储量及其影响因素研究 认领 引用 被引量：7
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作者 蒋星驰 温苏雅勒图 +6 位作者 李俊瑶 陈峰 胡晋瑜 王国林 秦素娟 卢建男 王少昆 《中国沙漠》 CSCD 北大核心 2023年第2期170-183,共14页
土壤碳氮储量对陆地生态系统碳氮循环及全球变化研究具有重要意义。为了阐明乌拉特梭梭(Haloxylon ammodendron)林国家级自然保护区土壤碳氮储量分布与变化规律,利用相关性分析、随机森林与SHAP解释方法确定影响土壤碳氮储量的关键因子... 土壤碳氮储量对陆地生态系统碳氮循环及全球变化研究具有重要意义。为了阐明乌拉特梭梭(Haloxylon ammodendron)林国家级自然保护区土壤碳氮储量分布与变化规律,利用相关性分析、随机森林与SHAP解释方法确定影响土壤碳氮储量的关键因子。本研究采用可通行路线网格布点法,在保护区内布设61个调查点,采集表层土壤(0~20 cm),测定土壤碳氮储量,分析其主要影响因素。结果表明:乌拉特梭梭林保护区内土壤全碳和全氮储量在空间上均呈现西高东低、北高南低的特点,其中核心区的全碳储量(1429.91 g·m-2)显著高于缓冲区(1194.09 g·m-2)和试验区(986.36 g·m-2);不同区域的全氮储量差异不显著(P>0.05),核心区、缓冲区、试验区分别为76.79、62.39、51.28 g·m-2;pH、电导率、梭梭树高度、物种丰富度、植被盖度和草本生物量在3个区域差异显著(P<0.05)。影响梭梭林保护区表层土壤全碳储量的关键因子为土壤全碳、土壤全氮、土壤含水率、电导率、容重、梭梭树高度、植物密度和pH,SHAP分析表明土壤容重、pH与土壤全碳储量呈负相关,其余因子与土壤全碳储量均呈显著性正相关;影响土壤全氮储量的关键因子为土壤全氮、土壤全碳、电导率、容重、土壤含水率、梭梭树高度、植被盖度、碳氮比和植物密度,SHAP分析表明土壤容重、碳氮比与土壤全氮储量呈负相关,其余因子与土壤全氮储量均呈显著性正相关;基于SHAP值计算的平均因子贡献率表明,保护区内较低的植物密度是限制土壤碳氮储量的关键因素。本研究同时发现,当梭梭树的平均高度高于2 m时对土壤碳氮储量的贡献有显著提升,因此加强对保护区内梭梭林的管理对提升土壤质量具有积极作用。 展开更多
关键词 梭梭(Haloxylon ammodendron) 土壤全碳储量 土壤全氮储量 SHAP
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干旱区荒漠绿洲过渡带建植梭梭(Haloxylon ammodendron)林后土壤线虫群落演变 认领 引用 被引量：7
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作者 安芳娇 苏永中 +1 位作者 牛子儒 刘婷娜 《中国沙漠》 CSCD 北大核心 2024年第2期133-142,共10页
荒漠绿洲过渡带人工固沙梭梭(Haloxylon ammodendron)林生长发育过程中,土壤生物多样性的演变研究是认识干旱区植物-土壤相互作用的重要内容。在河西走廊中段临泽绿洲边缘选择不同栽植时间序列(0、3、6、11、19、28、46 a)的固沙梭梭林... 荒漠绿洲过渡带人工固沙梭梭(Haloxylon ammodendron)林生长发育过程中,土壤生物多样性的演变研究是认识干旱区植物-土壤相互作用的重要内容。在河西走廊中段临泽绿洲边缘选择不同栽植时间序列(0、3、6、11、19、28、46 a)的固沙梭梭林,取冠层下和冠层外的表层土样(0~10 cm),研究固沙梭梭林建立后土壤线虫群落组成和多样性变化,探究线虫群落对植被-土壤系统恢复的指示作用。结果表明:在研究区共发现15个属,Eucephalobus和Acrobeloides为优势属,食细菌线虫(BF)为优势营养类群,占线虫总数50.3%~94.1%。梭梭生长显著提高土壤线虫总数、食细菌线虫丰度和线虫多样性。线虫富集指数(EI)和结构指数(SI)均小于50,土壤食物网随梭梭种植年限增加先稳定后逐渐退化。冗余分析表明,土壤化学性质变化(电导率EC、C/N和土壤有机碳SOC)显著影响线虫群落分布,EC对线虫属总变异解释率最高(32.7%)。土壤线虫作为生物指标揭示了植被-土壤生态系统的演变过程。 展开更多
关键词 固沙梭梭(Haloxylon ammodendron)林 固沙年限 土壤线虫群落 多样性 绿洲边缘
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高矿化度水灌溉条件下梭梭(Haloxylon ammodendron)的光合生理特征 认领 引用 被引量：4
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作者 张涛涛 范敬龙 +2 位作者 王世明 徐新文 柴朝晖 《中国沙漠》 CSCD 北大核心 2020年第5期112-119,共8页
为了探究荒漠优势植物梭梭(Haloxylon ammodendron)对咸水(10、20、30、40、50 g·L-1)灌溉的适应性,测定分析了植株地上部分生长量、叶绿素含量、渗透调节物质含量、抗氧化酶活性、呼吸作用以及叶绿素荧光指标。结果表明:(1)随着... 为了探究荒漠优势植物梭梭(Haloxylon ammodendron)对咸水(10、20、30、40、50 g·L-1)灌溉的适应性,测定分析了植株地上部分生长量、叶绿素含量、渗透调节物质含量、抗氧化酶活性、呼吸作用以及叶绿素荧光指标。结果表明:(1)随着灌溉水矿化度的提高(超过20 g·L-1),对地径与新枝有显著抑制作用,50 g·L-1时植株仍能继续生长,表现出很强的耐盐性。(2)渗透调节物质含量与抗氧化酶活性在低浓度处理时升高,但灌水矿化度超过20 g·L-1时表现出下降趋势。(3)限制同化枝净光合速率(Pn)的主要因素随着灌溉时间的增加由非气孔限制逐渐变成气孔限制,同时各组间的差异性减小。(4)同化枝光化学量子效率(ΦPSⅡ)随着灌溉水矿化度提高有明显下降趋势,40、50 g·L-1组与对照组存在显著差异,灌溉60 d后各处理降幅减小。 展开更多
关键词 梭梭(Haloxylon ammodendron) 咸水灌溉 气体交换 叶绿素荧光 适应
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Effects of water stress on Haloxylon ammodendron seedlings in the desert region of Heihe inland river watershed, Gansu Province, China 认领 引用 被引量：3
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作者 刘发民 仵彦卿 +1 位作者 苏建平 杜明武 《Journal of Forestry Research》 CAS 2003年第3期197-201,共5页
The water relation and leaf gas exchange of saxoul (Haloxylon Ammodendron Bge, a C4 shrub) seedlings were studied under water stress in 2001. Saxoul seedlings maintained high transpiration when the soil moisture was a... The water relation and leaf gas exchange of saxoul (Haloxylon Ammodendron Bge, a C4 shrub) seedlings were studied under water stress in 2001. Saxoul seedlings maintained high transpiration when the soil moisture was above 11%. The seedlings were able to take up water from soil with above 6 % soil water content, which was the threshold level of soil moisture for seedlings. The relationship between transpiration and potential evaporation was linear for well-watered seedlings. The de-crease of soil water availability led to different degrees of down-regulation of stomatal conductance, leaf transpiration and net CO2 assimilation rate. The stomata played a relatively small part in determining the net CO2 assimilation rate for the same seedling. The relationship between net CO2 assimilation rate and transpiration was linear diurnally, and reduction scale of leaf transpiration was much bigger than that of net CO2 assimilation rate by waters tress treatments, therefore intrinsic wa-ter-use-efficiency increased. High evaporative demand increased the leaf transpiration but inhibited net CO2 assimilation rate. Because of the effect of VPD on transpiration in this region, the transpiration of well-watered and mild water stress seedlings becomes responsive to change in stomatal conductance over a wider range. 展开更多
关键词 Haloxylon ammodendron, Water stress Leaf gas exchange Water relation Stomatal conductance Seedling
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Genetic relationship between parasitized and non-parasitized Haloxylon ammodendron in the Alxa Desert 认领 引用 被引量：1
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作者 Xu-Mei WANG Dong-Ye YANG +3 位作者 yong-Zhen TIAN Peng-Fei TU Qi-Shi SUN Xiao-Bo LI 《Journal of Systematics and Evolution》 SCIE CAS 北大核心 2009年第3期255-262,共8页
Haloxylon ammodendron （C. A. Mey.） Bunge is a host for the holoparasitic plant Cistanche deserticola Y. C. Ma, the original source of medicinal material known as Herba Cistanchis. The inter-simple sequence repeat ma... Haloxylon ammodendron （C. A. Mey.） Bunge is a host for the holoparasitic plant Cistanche deserticola Y. C. Ma, the original source of medicinal material known as Herba Cistanchis. The inter-simple sequence repeat marker was used to assess the genetic variations and relationships among six accessions ofH. ammodendron with a total of 120 individuals collected from three localities in the Alxa Desert, Inner Mongolia, China. At each locality, individuals both parasitized （PP） by C. deserticola and non-parasitized （NP） were sampled. The results showed that Nei＇s gene diversity and Shannon＇s index of PP accessions were higher, but were not significantly different, from those of NP accessions. An unweighted pair-group method arithmetic average dendrogram showed two clusters, one that included all PP accessions, and the other the NP accessions. Genetic differentiation therefore existed between PP and NP accessions, which might be attributed to low gene flow between the NP and PP groups （Nm〈 1）. However, the relationship between genetic distance and geographic distance within each group, although not statistically significant in this study, might be associated with high gene flow in both the NP and PP groups. 展开更多
关键词 genetic relationship Haloxylon ammodendron ISSR marker parasitism.
Potential distribution of Haloxylon ammodendron in Central Asia under climate change 认领 引用 被引量：1
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作者 CHEN Zhuo SHAO Minghao +2 位作者 HU Zihao GAO Xin LEI Jiaqiang 《Journal of Arid Land》 SCIE CSCD 2024年第9期1255-1269,共15页
Understanding the spatial distribution of plant species and their dynamic changes in arid areas is crucial for addressing the challenges posed by climate change.Haloxylon ammodendron shelterbelts are essential for the... Understanding the spatial distribution of plant species and their dynamic changes in arid areas is crucial for addressing the challenges posed by climate change.Haloxylon ammodendron shelterbelts are essential for the protection of plant resources and the control of desertification in Central Asia.Thus far,the potential suitable habitats of H.ammodendron in Central Asia are still uncertain in the future under global climate change conditions.This study utilised the maximum entropy(MaxEnt)model to combine the current distribution data of H.ammodendron with its growth-related data to analyze the potential distribution pattern of H.ammodendron across Central Asia.The results show that there are suitable habitats of H.ammodendron in the Aralkum Desert,northern slopes of the Tianshan Mountains,and the upstream of the Tarim River and western edge of the Taklimakan Desert in the Tarim Basin under the current climate conditions.The period from 2021 to 2040 is projected to undergo significant changes in the suitable habitat area of H.ammodendron in Central Asia,with a projected 15.0% decrease in the unsuitable habitat area.Inland areas farther from the ocean,such as the Caspian Sea and Aralkum Desert,will continue to experience a decrease in the suitable habitats of H.ammodendron.Regions exhibiting frequent fluctuations in the habitat suitability levels are primarily found along the axis stretching from Astana to Kazakhskiy Melkosopochnik in Kazakhstan.These regions can transition into suitable habitats under varying climate conditions,requiring the implementation of appropriate human intervention measures to prevent desertification.Future climate conditions are expected to cause an eastward shift in the geometric centre of the potential suitable habitats of H.ammodendron,with the extent of this shift amplifying alongside more greenhouse gas emissions.This study can provide theoretical support for the spatial configuration of H.ammodendron shelterbelts and desertification control in Central Asia,emphasising the importance of proactive measures to adapt to climate change in the future. 展开更多
关键词 Haloxylon ammodendron potential suitable habitats climate change desertification maximum entropy(MaxEnt)model Central Asia Aralkum Desert
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Increased Storability of Haloxylon ammodendron Seeds in Ultra-drying Storage 认领 引用 被引量：16
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作者 黄振英 张新时 +2 位作者 郑光华 景新明 林坚 《Acta Botanica Sinica》 2002年第2期239-241,共3页
梭梭 (HaloxylonammodendronBge .)的种子为短命种子 ,在自然状态下 ,种子的含水量为 8.5 % ,寿命约为 10个月。将梭梭种子含水量降至 2 .5 %和 1.4% ,其耐贮藏力增强。经过 5 0℃下 5d和 10d的人工加速老化后 ,超干种子表现出较强的抗... 梭梭 (HaloxylonammodendronBge .)的种子为短命种子 ,在自然状态下 ,种子的含水量为 8.5 % ,寿命约为 10个月。将梭梭种子含水量降至 2 .5 %和 1.4% ,其耐贮藏力增强。经过 5 0℃下 5d和 10d的人工加速老化后 ,超干种子表现出较强的抗老化能力。与对照相比 ,超干种子具有较高的萌发率、活力指数及较长的根 。 展开更多
关键词 Haloxylon ammodendron short-lived seed ultra-drying storage
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不同地下水位处梭梭(Haloxylon ammodendron)水分来源特征 认领 引用 被引量：13
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作者 李宁 周海 +2 位作者 任珩 种培芳 陈国鹏 《中国沙漠》 CSCD 北大核心 2021年第4期79-86,共8页
梭梭(Haloxylon ammodendron)是中亚荒漠区分布最广泛的植物,长期被作为防风固沙的优良树种。在降水严重匮乏的荒漠区,地下水埋深对梭梭的正常生长具有关键作用。选择黑河中游临泽绿洲边缘人工梭梭林为研究区域,选择生长沙丘和丘间低地... 梭梭(Haloxylon ammodendron)是中亚荒漠区分布最广泛的植物,长期被作为防风固沙的优良树种。在降水严重匮乏的荒漠区,地下水埋深对梭梭的正常生长具有关键作用。选择黑河中游临泽绿洲边缘人工梭梭林为研究区域,选择生长沙丘和丘间低地相同林龄的梭梭,对植物茎水及其他潜在水源(降水、土壤水、地下水)的氢氧同位素值进行了测定,并结合IsoSource模型计算了梭梭在沙丘和丘间低地不同微地形条件下的水分来源比例。结果显示:分布于沙丘顶部和丘间低地的梭梭茎木质部水δ18O值存在显著的差异,且沙丘顶部梭梭对降水变化的响应程度显著大于丘间低地的梭梭。沙丘和丘间低地地下水埋深条件的差异对梭梭主要水分来源以及对水分变化的响应程度的影响较为显著,分布于沙丘顶部的梭梭利用地下水的比例为60.6%;而丘间低地梭梭对地下水的利用比例为86.4%。沙丘和丘间低地分布的梭梭的水分利用策略发生变化,沙丘梭梭在降水事件发生时能够及时响应,而丘间低地梭梭对降水的利用不显著,夏季的严重干旱胁迫致使沙丘和丘间低地梭梭都增加了对地下水的利用,说明梭梭对地下水具有很强的依赖性,但是可以根据环境条件调节自身水分利用模式以适应荒漠环境。 展开更多
关键词 荒漠生境 沙丘和丘间低地 稳定同位素 植物水分来源 梭梭(Haloxylon ammodendron)
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Competition,spatial pattern,and regeneration of Haloxylon ammodendron and Haloxylon persicum communities in the Gurbantunggut Desert,Northwest China 认领 引用 被引量：5
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作者 LIU Yaxuan ZENG Yong +2 位作者 YANG Yuhui WANG Ning LIANG Yuejia 《Journal of Arid Land》 SCIE CSCD 2022年第10期1138-1158,共21页
Competition,spatial pattern,and regeneration are important factors affecting community composition,structure,and dynamics.In this study,we surveyed 300 quadrats from three dunes(i.e.,fixed dunes,semifixed dunes,and mo... Competition,spatial pattern,and regeneration are important factors affecting community composition,structure,and dynamics.In this study,we surveyed 300 quadrats from three dunes(i.e.,fixed dunes,semifixed dunes,and mobile dunes)in the Gurbantunggut Desert,Northwest China,from late May to early June in 2021.The intraspecific and interspecific competition,spatial pattern,and regeneration of Haloxylon ammodendron and Haloxylon persicum were studied using the Hegyi competition index and point pattern analysis methods.The results showed that the optimal competition distance of the objective tree in the H.ammodendron and H.persicum communities was 6 m.The intraspecific and interspecific competition of H.ammodendron was the greatest in fixed dunes,while the competition intensity of H.persicum in semifixed dunes and mobile dunes was greater than that in fixed dunes.The order of competition intensity of the two populations was seedlings>saplings>adults,and the competition intensity gradually decreased with the increase in plant diameter.The spatial distribution pattern of the three life stages of H.ammodendron and H.persicum was random,and there were no correlations between seedlings and saplings,adults and saplings,and seedlings and adults.The density of regenerated seedlings and saplings of H.ammodendron in the three dunes followed the order of fixed dunes>semifixed dunes>mobile dunes,and that of H.persicum in the three dunes followed the order of mobile dunes>semifixed dunes>fixed dunes.Therefore,when artificially planting H.ammodendron and H.persicum for sand control,the planting interval should be 6 m,and seedlings should be planted next to adults to minimize the competition between plants,which can promote the renewal of H.ammodendron and H.persicum and the stabilization of the ecosystem. 展开更多
关键词 competition spatial pattern regeneration Haloxylon ammodendron Haloxylon persicum Gurbantunggut Desert
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Stem sap flow of Haloxylon ammodendron at different ages and its response to physical factors in the Minqin oasis-desert transition zone, China 认领 引用 被引量：3
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作者 QIANG Yuquan ZHANG Jinchun +2 位作者 XU Xianying LIU Hujun DUAN Xiaofeng 《Journal of Arid Land》 SCIE CSCD 2023年第7期842-857,共16页
Haloxylon ammodendron, with its tolerance of drought, high temperature, and salt alkali conditions, is one of the main sand-fixing plant species in the oasis-desert transition zone in China. This study used the TDP30(... Haloxylon ammodendron, with its tolerance of drought, high temperature, and salt alkali conditions, is one of the main sand-fixing plant species in the oasis-desert transition zone in China. This study used the TDP30(where TDP is the thermal dissipation probe) to measure hourly and daily variations in the stem sap flow velocity of H. ammodendron at three age-classes(10, 15, and 20 years old,which were denoted as H10, H15, and H20, respectively) in the Minqin oasis-desert transition zone,China, from May through October 2020. By simultaneously monitoring temperature, relative humidity,photosynthetically active radiation, wind speed, net radiation, rainfall, and soil moisture in this region, we comprehensively investigated the stem sap flow velocity of different-aged H. ammodendron plants(H10,H15, and H20) and revealed its response to physical factors. The results showed that, on sunny days, the hourly variation curves of the stem sap flow velocity of H. ammodendron plants at the three age-classes were mainly unimodal. In addition, the stem sap flow velocity of H. ammodendron plants decreased significantly from September to October, which also delayed its peak time of hourly variation. On rainy days, the stem sap flow velocity of H. ammodendron plants was multimodal and significantly lower than that on sunny days.Average daily water consumption of H. ammodendron plants at H10, H15, and H20 was 1.98, 2.82, and 1.91kg/d, respectively. Temperature was the key factor affecting the stem sap flow velocity of H. ammodendron at all age-classes. Net radiation was the critical factor influencing the stem sap flow velocity of H.ammodendron at H10 and H15;however, for that at H20, it was vapor pressure deficit. The stem sap flow velocity of H. ammodendron was highly significantly correlated with soil moisture at the soil depths of 50and 100 cm, and the correlation was strengthened with increasing stand age. Altogether, our results revealed the dynamic changes of the stem sap flow velocity in different-aged H. ammodendron forest stands and its response mechanism to local physical factors, which provided a theoretical basis for the construction of new protective forests as well as the restoration and protection of existing ones in this region and other similar arid regions in the world. 展开更多
关键词 Haloxylon ammodendron stem sap flow stand age soil moisture water consumption Minqin oasis-desert transition zone
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Haloxylon ammodendron (Amaranthaceae) fruit development delay caused by post-flowering non-inductive photoperiod 认领 引用 被引量：1
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作者 REN Cai YU Tian +7 位作者 QU Guanghang WANG Shuang WANG Ze Abudoukeyumu MIJITI ZHANG Hua MA Lin HE Xiaoling MA Hao 《Journal of Arid Land》 SCIE CSCD 2017年第3期408-418,共11页
Haloxylon ammodendron （C. A. Mey.） is one of the economically and ecologically important desert trees used for sand fixation. The ovary of H. ammodendron is found not to swell after flowering in spring until at the ... Haloxylon ammodendron （C. A. Mey.） is one of the economically and ecologically important desert trees used for sand fixation. The ovary of H. ammodendron is found not to swell after flowering in spring until at the end of August or early September in western China. However, what happens for ovary at anatomic level in that period and which crucial ecological factor regulates the phenomenon of H. ammodendron have not been fully understood. To characterize the phenomenon and explore the crucial environmental regulating factors, we carried out the morphological and anatomic observations at the different development stages of the fruits and three single-factor experiments （low air temperature, sufficient soil moisture, and short day length）. Our results showed that under the natural conditions, the ovary of H. ammodendron after flowering developed slowly and the morphological changes of fruits were not significant for the period from May to August and after late August or early September; and then the ovary developed rapidly and matured in October. Cell division in embryo was observed to start approximately 25 days after flowering （DAF） and just developed to globular embryo stage at mid-August. Photoperiod was identified as the pivotal environmental factor regulating the fruit development of H. ammodendron. Moreover, the threshold value of day length for the fruit development was 14.0 h. A long day （〉14.0 h） treatment began from 5 DAF could delay fruit development of H. ammodendron while a short day （〈14.0 h） treatment could accelerate it. Moreover, a further longer day treatment （〉15.0 h） could also delay fruit development even when they had developed for a long time （110 DAF）. The present study indicated that H. ammodendron adopted a reproductive strategy of delayed fruit development and this strategy helps it survive and obtain offspring in harsh desert habitats. 展开更多
关键词 environmental factor fruit development Haloxylon ammodendron photoperiod reproductive strategy
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梭梭(Haloxylon ammodendron)生理与个体用水策略对降水改变的响应 认领 引用 被引量：46
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作者 许皓 李彦 +2 位作者 邹婷 谢静霞 蒋礼学 《生态学报》 CAS 北大核心 2007年第12期5019-5028,共10页
随着全球变化的加剧,降水改变正导致荒漠生态系统中植物用水策略的适应性变化;对降水变化响应的种间差异性影响着荒漠植物群落组成。研究将生理生态与个体形态尺度相结合,调查中亚荒漠关键种梭梭Haloxylon ammodendron对降水变化导致的... 随着全球变化的加剧,降水改变正导致荒漠生态系统中植物用水策略的适应性变化;对降水变化响应的种间差异性影响着荒漠植物群落组成。研究将生理生态与个体形态尺度相结合,调查中亚荒漠关键种梭梭Haloxylon ammodendron对降水变化导致的自然生境中水分条件改变的响应与适应。实验于2005年生长期开展,在古尔班通古特沙漠南缘原始盐生旱生荒漠中设置3个降水梯度(自然、双倍和无降水);观测并比较不同降水条件下光合作用、蒸腾作用、叶水势、水分利用效率、地上生物量累积和根系分布的变化。结果表明,梭梭主要利用降水形成的浅层土壤水维持生存;有效的形态调节和较强的气孔控制是其维持光合能力以及适应降水变化的主要机制;降水增多对其产生正效应,预示着梭梭可能在未来种间竞争和群落演替中占有优势。 展开更多
关键词 梭梭 降水改变 光合作用 叶水势 生物量累积 根系分布 用水策略 形态调节
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古尔班通古特沙漠南缘非灌溉条件下梭梭(Haloxylon ammodendron)蒸腾耗水特征 认领 引用 被引量：36
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作者 曹晓明 陈曦 +2 位作者 王卷乐 王权 王珊珊 《干旱区地理》 CSCD 北大核心 2013年第2期292-302,共11页
利用热平衡包裹式茎流计连续测定了古尔班通古特沙漠南缘原生梭梭2010年5月6日～10月12日的茎干液流及气象因子数据,探究了非灌溉条件下不同直径梭梭在其蒸腾耗水特性及与气象因子相关性之间的差异。结果表明:(1)茎干液流昼夜变化规律明... 利用热平衡包裹式茎流计连续测定了古尔班通古特沙漠南缘原生梭梭2010年5月6日～10月12日的茎干液流及气象因子数据,探究了非灌溉条件下不同直径梭梭在其蒸腾耗水特性及与气象因子相关性之间的差异。结果表明:(1)茎干液流昼夜变化规律明显,蒸腾日变化呈双峰或多峰趋势,夜间保持较小液流;午休现象多出现于14∶00～16∶00。相同环境因子影响下,直径越大,茎干液流速率越大,午休现象也越明显;(2)在生长季,不同直径梭梭液流的启动和停止时间存在差异,6～8月,直径越大,液流启动时间越早,停止时间越晚。同一植株液流在不同月份的启动和停止时间差异较大,生长初期,液流启动早,停止迟;生长季末期,液流启动迟,停止早;(3)5～8月,液流日累积过程呈明显的"S"型趋势;9～10月,呈斜率一致的一条直线。直径越大,日累积量和累积速率越大,第一拐点到达时刻越早,第二拐点到达时刻越晚;(4)液流速率与太阳辐射的相关性最好,其次为气温和相对湿度,风速最小;相关性在7月份最大,6月和8月次之,10月最小。相同环境条件下,直径越大,其液流速率对气象因子的响应越明显;(5)观测时段内,7月耗水最多,6月、8月、9月次之,5月和10月最少。直径越大耗水量越多,直径9.9、13.4、22.9 cm日均耗水量为0.570、0.595、0.694 mm,总耗水量为92.904、96.923、113.052 mm,液流通量为0.263、0.284、0.346 L.cm-2.d-1。与干旱区不同生境的梭梭相比,古尔班通古特沙漠原生梭梭的液流通量相对较小。不同地点和生境的梭梭在耗水数量、耗水日过程特性等方面差异明显,这为天然荒漠植被防护林的管理及沙漠区人工灌溉植物的水资源合理配置提供了一定的决策支持。 展开更多
关键词 古尔班通古特沙漠 梭梭 茎干液流 蒸腾耗水 气象因子 茎流热平衡技术
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