Changes of Soil Properties of Dark Coniferous Clear-cutting Forestland in Eastern Tibetan Plateau

Through the overview, we have known the condition of microclimate, vegetation, hydrology and soil environmental factors in dark coniferous forest cutting-blank, and indicated the existing questions, including: (1)only emphasizing the spot, however neglecting the study about the course of ecological restoration; (2)emphasizing the vegetation investigation, but neglecting the research of soil environmental changes; (3)and seldom study the mechanism of cutting-blank ecological environmental changes. The combination of changes of cutting-blank ecological rnvironment and course of ecological restoration are put forward. In future research, we should study the environmental factors that are long located in the layers from 40cm downground to 150cm aboveground and significantly affect the environmental changes in cutting-blank.