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塔克拉玛干沙漠边缘柽柳对土壤水盐分布的影响
Authors
冯固
尹传华
+3 more
张福锁
田长彦
白灯莎
Publication date
1 January 2007
Publisher
Abstract
以塔克拉玛干沙漠边缘地区生长的柽柳为研究对象,测定了柽柳灌丛下及周围土壤中Na+和K+含量、电导率、pH值、水分以及柽柳营养枝Na+和K+含量等指标.结果表明,柽柳灌丛造成土壤盐分呈现斑块状分布,形成盐岛.柽柳体内较高的盐分含量可能是造成土壤盐分分布变化的重要因素之一(盐岛效应).相关分析表明,盐岛效应强弱与背景土壤水盐条件密切相关.在背景土水盐条件适中的冲积平原中部,盐岛效应最显著;而在背景土盐分最重的冲积平原中下部和水分含量最低的沙漠边缘,盐岛效应消失.在柽柳生长的适宜地下水位,盐岛效应最明显.柽柳还使冠下土壤Na/K发生改变,碱性增加,含水量降低
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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