Hydrological Effects of Soil in Water Conservation Forest in Jinyun Mountain of Chongqing

Soil layer is the third active layer of hydrological effects of water conservation forest and it is vital to the hydrological effects of stand.The paper analyzes Pinus massoniana and Lindera kwangtungensis mixed forest,Gordonia acuminata and Symplocos setchuensis mixed forest,Phyllostachys pubescens and Symplocos setchuensis and Pinus massoniana mixed forest,Lindera kwangtungensis and Cunninghamia lanceolata mixed forest,Pinus massoniana and Cryptomeria fortunei mixed forest those are representatives in stand having the hydrological and ecological effect of soil by taking the forest soil with different configurations modes of Jinyun Mountain in Chongqing as a study object and taking pure Phyllostachys pubescens forest which is widely distributed in Jinyun Mountain as a reference.The outcomes show that a) in general,the soil bulk density has the tendency of increase and the porosity has the tendency of decrease along with the increase of soil depth;b) among each stand,the soil bulk density of Lindera kwangtungensis and Cunninghamia lanceolata mixed forest is the smallest and the porosity the biggest,maximum moisture capacity the biggest and permeability the best,then is Pinus massoniana and Cryptomeria fortunei mixed forests,and the pure Phyllostachys pubescens forest is the worst.