Changes of Vegetation Characteristics in Alpine Meadow-steppe of Eastern Qilian Mountains after Different Grazing Rest Modes Responses of Leymus chinensis Individual Traits to Different Grazing Patterns Ecological Responses of Belowground Biomass and Soil Characteristics to Different Grazing Rest Modes in Alpine Meadow-Steppe A Study on Grazing Pattern and Grazing Internsity on Pasture at Hong Chi Ba The Regressive Succession Pattern and Its Diagnostic of Inner Mongolia Steppe in Sustained and Superstrong Grazing