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宁南山区草地植被恢复方式对土壤饱和导水率的影响
Authors
华娟
张扬
赵世伟
Publication date
1 January 2009
Publisher
Abstract
为评价宁南山区草地植被不同恢复方式对土壤入渗性能的影响,以不同植被群落的饱和导水率为研究对象,采用逐步回归研究退耕农地、禁牧荒地、封育草地导水率的变化及影响因子,并探讨了其作用机制。结果表明:3种植被恢复方式均有利于0~40 cm土壤饱和导水性能提高;各土层土壤饱和导水率均随植被恢复而不断提高,0~5 cm土层改善作用最为明显;农地退耕序列和荒地禁牧序列5~40 cm土层、封育草地序列0~40 cm土层土壤饱和导水率随土层深度下降而降低;影响土壤饱和导水率的因子为土壤有机质因子和土壤结构因子;3种植被恢复方式土壤有机质质量分数与Ks均呈显著的线性相关关系,在该区域有机质质量分数越高,Ks增加越快;土壤有机质积累是土壤饱和导水率提高的根本动力。因此,草地封育更利于提高使该地区土壤导水性能提高,促进生态恢复
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Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources
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Last time updated on 21/09/2018