Abstract:

Abstract: Studied on change of soil moisture, soil bulk and underground biomass under different grazing press in southeast of Yunnan. The results indicate: (1)Grazing affected on soil moisture and soil bulk of the top soil(0-5cm), the soil moisture of surface decreased as grazing pressure increased, soil bulk density, soil bulk was maximum under GPI0.76 and soil bulk was less volature under GPI0.57, this showed that moderate grazing be advantageous to stable soil structure; (2)Underground biomass of grassland vegetation mainly in 0-10cm soil, accounting for 0-30cm soil layer of 64-74%, underground biomass decreased as grazing press increased.