论文部分内容阅读
本文以定位试验、野外调查和室内分析方法研究了黄土高原坡耕地水土流失对土壤主要物理性质影响的机理及变化规律。结果表明：＜０．０１ｍｍ粉粒、粗粘粒和粘粒流失是造成坡耕地土壤物理性质变化的根源，耕地土壤＜０．０１ｍｍ颗粒含量、孔隙度、团聚体含量、田间持水量随坡度增大减小，容重随坡度增大而增大，且土壤容重、孔隙度与坡度是线性相关，团聚体、田间持水量与坡度是指数函数相关。
This paper studied the mechanism and variation of soil erosion on the main physical and chemical properties of sloping farmland on the Loess Plateau by means of positioning test, field investigation and laboratory analysis. The results showed that the loss of <0.01mm silt, coarse clay and clay was the root of the change of physical properties of sloping farmland. The content of <0.01mm grain, porosity, aggregate content, The volumetric weight, porosity and slope are linearly correlated. The aggregates, field water content and slope are exponential functions.