江宁小流域主要植被类型土壤抗蚀性研究

摘要：以江宁小流域主要植被类型的土壤层为研究对象，从土壤水力侵蚀的主要过程着手，选取土壤入渗初渗率、稳渗率、土壤总空隙度、>0.25mm水稳性团聚体含量、>0.5mm水稳性团聚体含量、土壤水稳性指数、土壤抗冲指数、土壤抗剪切强度8个可以综合表征土壤抗蚀性的指标作为评价该区域土壤抗蚀性优劣的指标。采用计算简捷的Topsis法作为评价方法，并通过主成分法确定了各评价指标的权重。对江宁小流域主要植被类型土壤抗蚀性评价结果表明：马尾松林土壤抗蚀性最强；其次为杉木林、栎林；再次为毛竹林、灌木林、茶园；草地土壤抗蚀性较差；裸地土壤抗蚀性最差。

Study on soil Anti-erodibility of Main Vegetation Types in Jiangning Small Watershed

In order to evaluate the soil and water conservation function of main vegetation types in Jiangning small watershed, and afford scientific principle on screening suitable species of ecological protection forest construction in the region, the soil anti-erodibility of main vegetation types in the region was researched. Base on the process of soil water erosion, soil initial infiltration rate, steady infiltration rate, soil general porosity, > 0.25 mm water stable aggregate content, >0.5 mm water stable aggre...