【摘要】 选用5类16个指标对研究区不同地类土壤抗蚀性进行主成分分析,得到的4个主成分因子为无机胶粒类、团聚类、水稳性团聚体类和有机及微团聚类。不同地类各土层土壤抗蚀性综合指数大小排序为典型林分林地、疏幼林地、旱地、荒(草)地、坡耕地,典型林分林地土壤抗蚀性最强,其次为疏幼林地,再次为旱地、荒(草)地,最差的为坡耕地,表明在相同条件下坡耕地、荒(草)地、旱地、疏幼林地是研究区主要的流失地类。层次聚类分析结果显示,表层和亚表层土壤抗蚀性可分为5类,抗蚀性最强的一类是典型林分林地各土层。更多还原

【Abstract】 Sixteen indexes of 5 categories were used to analyze the soil anti-erodibility of different land-use of studied area by means of PCA and obtained the 4 categories of inorganic colloidal type,aggregate type,water-stable aggregate type and organic and micro-aggregate type that re- flects the majority information of characteristics.The sequence of comprehensive index of soil anti-erodibility of different land-use is as fol- lows:forest land,sparse-wood land,dry land,wilderness land and sloped farmland;the soil anti-erodibility of forest land is the strongest. then sparse-wood land,dry land,wilderness land and the slope farmland is the worst,showing sloped farmland,wilderness land,dry land and sparse-wood land under the similar condition will be the main soil loss land of the studied area.The outcomes of hierarchical cluster method show that the soil anti-erodibility of topsoil and sub-topsoil can be divided into 5 types and the strongest resistance is each soil layer of forest land.更多还原