Effects of Biological Crusts on Soil Anti-erodibility in Loess Hilly Areas
In order to study the effects of biological crusts forming in different development periods in loess hilly areas on soil anti-erodibility,the differences of soil disintegration and soil anti-shear strength under two different treatments,retention of biological crust and removal of biological crust were analyzed.The results were as followings:(1) the formation of biological crusts can reduce the soil disintegration quantity,with the development of biological crusts,the influence degree improved from 21.85％ to 43.46％ ; (2) the formation of biological crusts can improve the anti-shear strength of soil at the rate of 17.91％～23.45％,and the development of biological crusts has the positive correlation with soil anti-shear strength; (3) soil disintegration quality had the negative linear correlation with soil anti-shear strength.As the biological crust can enhance the soil particle interaction,the effect of moisture on soil particle dispersion was reduced,which made the rate of change of soil disintegration to anti-shear strength reduced.
国家科技期刊平台
NSTL
万方数据
维普
