On Hydrological Effects of Soil in Phyllostachys Pubescens Forest in Jinyun Mountain in Chongqing

Forest is of economic value and possesses the function of conserving water and soil.Soil layer is the third active layer of hydrological effects.Only the better structure of forest-vegetation type and the better depth of soil layer can maximize the hydro-ecological effect in the soil-forest system.However,water conservation is decided by soil pore and its characteristics.Taking the soil in Phyllostachys pubescens forest in Jinyun Mountain in Chongqing as a study object and taking even green broad-leaved forest which is widely distributed in Jinyun Mountain as a reference.Soil bulk density,soil porosity,and its capacity of water conservation have been measured in Phyllostachys pubescens forest and even green broad-leaved forest.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)the value of pH has the tendency of increasing in Phyllostachys pubescens forest and has the tendency of decrease in even green broad-leaved forest along with the increase of soil depth;c) the soil quality is looser,soil pore is more,and moisture capacity and permeability are better in Phyllostachys pubescens forest than those in evergreen broad-leaved forest.