水土保持研究2011，Vol.18Issue(5)：5-9,5.
岩溶区不同土地利用方式土壤抗蚀性分析
Analysis of Soil Anti-erodibility of Slope Farmland in Karst Mountain Area Based on Tillage Erosion
摘要
Abstract
Research on the surface soil anti-erodibility of different land use types by means of principal component analysis in Zhongliang Mountain of Chongqing was carried out based on the data of micro-aggregates,water stable aggregate and organic matter content as indicators.The results showed that： 0.25 mm,0.5 mm water stable aggregate and their destruction rate,average diameter and organic matter content are the four best indicators to evaluate the soil anti-erodibility;soil anti-erodibility under different land use types are shrub landgrassland bambooslope farmland,which convinces that farmland set-aside can improve the soil anti-erodibility.It can achieve opposite conclusion when use micro-aggregates categories as indicator and water stable aggregates and organic matter categories as indicator respectively,but the latter are consistent with the result of principal component analysis,which relate with a special process of soil formation and the fragile ecological environment in this area.Tillage erosion can conduct to soil property redistribution on the surface of slope,and then affect the soil anti-erodibility.The soil anti-erodibility in different parts of slope farmland is in the order of the upperthe lowerthe bottomthe top,which is consistent with the distribution of water stable aggregate content,it is showed that water stable aggregate category indicators better reflect the properties of soil anti-erodibility.关键词
岩溶区/耕作侵蚀/土壤抗蚀性/主成分分析Key words
karst area/tillage erosion/soil anti-erodibility/principal component analysis分类
农业科技引用本文复制引用
付允,贾亚男,蓝家程..岩溶区不同土地利用方式土壤抗蚀性分析[J].水土保持研究,2011,18(5):5-9,5.基金项目
中央高校基本科研业务费 （）
西南大学教师教育创新平台建设项目 （）
