Compare Water Conversation with Infiltration Capacity of Different Forest Vegetation Types in Ningxia Liupan Mountain

To analyze the four forest types such as Larix principris-upper-chtii,shrub forest,Pinus armandii and Betula platyphylla in the small watershed of Xiangshuihe,Liupanshan mountain.It indicated that these plots are different among soil bulk density,water holding capacity and the infiltration characteristic.The max water holding capacity in different forest land is influenced by thickness of the soil layers and the whole porosity,its values are between 313.4~604.8 mm;the stable infiltration coefficients are between 5.94~8.65 mm/min.As a result water-holding function of shrub forest is the best,we should plant more shrub forest.