辽北低山丘陵区坡耕地土壤侵蚀作用效果研究

本文研究不同坡度、降雨量、耕作方式对辽北低山丘陵区坡耕地土壤侵蚀作用的影响。研究结果表明：降雨量（x）与土壤流失量（y）之间遵守y=aebx的指数曲线变化规律，且有a〉0，b〉0的回归特征，说明土壤流失量随降雨量的增加而加剧；在相同降雨条件下，土壤流失量随坡度的增加而加剧，顺坡垄农田的侵蚀量＞等高垄农田的侵蚀量；流失量（y）和降雨量（x1）、坡度（x2）的回归方程为：Y=2.49-1.83 X1+ 2.13 X2+ 0.02 X1X1-0.162 X2X2 + 0.13 X1X2，降雨对流失量的影响要大于坡度对流失量的影响。

Research on the Effect of Soil Erosion to Sloping Land in the North Hilly Region of Liaoning Province

Typical plot methods was conducted to study the effect of soil erosion in sloping field at different slop,different rainfall and different cropping pattern under the condition of rainfall. The results showed that there was a relationship between rainfall（x） and soil loss（y）,and it followed the function of y = aebx（a ﹥0,b ﹥0）,which showed that the amount of soil erosion increased with the rainfall increasing. Under the same conditions of rainfall,the soil loss exacerbated with the slop increasing,and the soil loss on sloping tillage was more serious than that on contour tillage. The regression equation about soil loss（y）; rainfall（x1） and slop（x2） wasy = 2.49-1.83x 1＋ 2.13x 2＋0.02 x2 1 -0.162 x22 ＋0.13x 1x 2,and that the effect of rainfall to soil loss was greater than slop.