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干旱区绿洲-荒漠过渡带灌丛土壤属性研究
Authors
罗格平
许文强
陈曦
Publication date
1 January 2006
Publisher
Abstract
以天山北坡绿洲-荒漠过渡带为研究区,选择3种类型的灌丛并采集不同位置和深度的灌丛土壤样品进行分析,研究灌丛土壤资源的聚集效应.结果表明,干旱区绿洲-荒漠过渡带不同类型灌丛对土壤粒度分布的影响不显著,土壤以砂和粉砂为主,红柳+裸地灌丛土壤粒度分布的聚集效应明显;灌丛土壤有机质、全氮和速效钾含量在冠幅下最高,其次为灌丛间低矮植物下,灌丛间裸地最低,呈现出明显的“肥岛”现象;不同灌丛类型和采样位置对土壤盐分离子和总盐含量的变化影响显著,且不同灌丛土壤资源的聚集效应各异;导致不同类型灌丛土壤资源富集率不同的原因有气候因素、灌木分布的土壤环境、灌丛高度和冠幅、灌丛间有无低矮植物等
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Institutional Repository of Xinjiang Institute of Ecology and Geography, CAS
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Last time updated on 29/11/2016