Study on the Water Conservation Capacities of Soil with Major Forest Types in Baishilazi Natural Reserve

Forest soil as the most important function layer for the forest eco-hydrological role,its ability to conserve water sources in regulating floods and drought,reducing and preventing soil erosion plays an important role.Starting from the vertical distribution laws of soil types in line with plant zone in Baishilazi Nature Reserve,water conservation function of soil under major vegetation types of forest was studied.The results showed that soil bulk density in different forest types was in the order of artificial Korean pine forest forest of Picea jezoensis and Abies nephrolepis Korean pine broad-leaved mixed forest mixed forest Quercus mongolicus forest,and the bulk density of the upper soil was smaller than that of the lower soil.The capillary porosity,non-capillary porosity,total porosity,water content,the maximum capillary water holding capacity,infiltration rate of different forest types were as follows:Quercus mongolicus forest mixed forest Korean pine broad-leaved mixed forest forest of P.jezoensis and A.nephrolepis artificial Korean pine forest,and the values in the upper layer of each forest type was greater than that of the lower layer.The water storage capacity of soil under different forest types was between 729.5-1 227.8 t/hm2.The water conservation function of soil under Quercus mongolicus forest was the best,followed by mixed forest,Korean pine broad-leaved mixed forest,forest of P.jezoensis and A.nephrolepis and artificial Korean pine forest.