COMPARISON ON THE DIFFERENCE IN SOIL SEED BANK BETWEEN GRAZED AND ENCLOSED GRASSLANDS IN HORQIN SANDY LAND Characteristics and influence factors of the swamp degradation under the stress of grazing in the Zoige Plateau Physiological indices of grazed grassland under health management Influence of Sulphur Fertilizer on Sulphur Cycling and Its Implications on Sulphur Fertilizer Requirement of Grazed Pasture in Warm Seasonal Rangeland of Nei Monggol Steppe of China Carbon Exchange Characteristics of Fenced and Natural Grazed Grassland in Loess Plateau Separating Root and Soil Microbial Contributions to Total Soil Respiration in a Grazed Grassland in the Xilin River Basin Assessment of typical steppe ecosystem health in Inner Mongolia Seasonal dynamics of root-shoot ratio and the effect of factors in grazed and ungrazed grasslands of the Loess Plateau Effects of Enclosure and Fertilization on the Chlorophyll Fluorescence Characteristics of Four Dominant Plants in Alpine Meadow