辽西黄土丘陵区坡耕地土壤侵蚀研究

Study of Soil Erosion on Cultivated Slopeland in Loess Hilly Region in Western Liaoning

采用一次回归正交组合设计 ,利用野外人工模拟侵蚀降雨试验对辽西黄土丘陵区坡耕地土壤侵蚀进行了研究 ,探明了影响该区坡耕地土壤侵蚀的主要因子依次是降雨侵蚀力 (R)、雨前土壤含水量 (W)、作物盖度 (C)和地面坡度 (S)及其作用机理 ,根据试验结果建立了土壤侵蚀预测数学模型 ,为坡耕地土壤侵蚀的计算。

Soil erosion on cultivated slopeland in loess hilly region in western Liaoning was studied using linear regression quadrature plan and field simulated rainfall.The result showed that major factors affecting soil erosion were rainfall erosion index,soil water content,crop cover degree,and slope gradient in proper and their effected function.Soil erosion prediction equation was established according to expermental results and provided technical measure and theoretical foundation for calculation,prediction and prevention of soil erosion on cultivated slopeland.