Soil erosion resistance of typical forests in Jinyun mountain in Chongqing city
WANG Yu-Jie-；Wang-Yun-Qi-；Jia-Yi-Beng
1.College of Soil and Water Conservation in Beijing Forestry University,Key Lab of Soil and Water Conservation and Desertification Combating,Ministry of Education,100083,Beijing;2.Chongqing JinYun Mountain National Nature Protection Region Management Bureau,400700,Chongqing: China
Abstract：For the vegetation construction of soil and water conservation in Three Gorges Resevior,the forest soil erosion resistance of 4 typical forests(mixed wood,broadleaf forest,bamboo forest and shrub forest)in Jinyun mountain in Chongqing city were studied.Under the experiment of water dipping and scourry,the result shows that,the forest soil erosion resistance indexes is 1.31.9 times as farmland,and the order is that shrub forest(78.4) is maximum,mixed wood(63.1) and bamboo(63.3) are secondary,the minimum is broadleaf forest(53.3).The soil erosion resistance index is weekened with the soil layer deepening.The analog equation between soil erosion resistance index and time is quadratic power function curve,whose correlation coefficient is above 0.9.The soil erosion resistance indexes have very close relations with non-capillary porosity,soil capillary porosity,final infiltration rate,the content of organic matter.The order of soil erosion resistance coefficient is that the maximal is broadleaf forest(2.719),mixed wood(2.431),and shrub forest(2.024) are secondary,and the minimal is bamboo forest(1.096).Except bamboo forest soil,anti-scour(resistance) coefficients of other forest are more than that of farmland(1.2－1.9times),and the anti-scour(resistance)(coefficients) has a closest relation with the thickness of soil layer.
2006, Vol. 4 
