Basic Soil Properties under Different Grassland Use Types in Haibei State of Qinghai Province Dominant species and ecosystem gas exchange in temperate grassland under different land use patterns Relationships between biodiversity and biomass under different regimes of grassland use in Hulunbeir, Inner Mongolia The ecological stoichiometry of dominant species in different land uses type of grassland Soil Microbial Characteristic and Soil Respiration in Grassland under Different Use Patterns