Fuyun County in Xinjiang lies at the south foot of the Altay Mount?ins and in the north edge of Junggar Basin, under the background of extremely bitter enviorment and fragile desert habitat, for a long time, it mainly depends on natural grassland to mange animal husbandry, forms grassland production system, and animal husbandry economy in which nomad is the main pattern because of imperfect structure and function exploitation of system, intrinsic contradictions not being effectively controlled, system disco...