RESPONSE OF ROOT DISTRIBUTION OF HALOXYLON AMMODENDRON SEEDLINGS TO IRRIGATI ON AMOUNTS IN THE TAKLIMAKAN DESERT, CHINA Effects of different land-use types on soil carbon and nitrogen contents in the northern region of Qinghai Lake Underground Biomasses of Nursery Grown Plants Irrigated with Highly Mineralized Water in Taklimakan Desert Response of Underground Biomass to Grazing Trampling in Steppe Grassland of Huanxian County,Gansu Province,Northwestern China Morphological Mechanisms of Drought Resistance of Zoysia Willd Advances in the rescarch of underground biomass Evaluation of Forage-livestock Balance Mechanisms under the Perspective of Integrated Grazing System Dynamics of litter and under-ground biomass in Carex lasiocarpa wetland on Sanjiang Plain Advances in the rescarch of underground biomass