Study On The Effect Of Rare-earth Element For Interface Of Grassland Animal Coupling On High And Cold Pasture Ecosystem Of Qinghai-Tibetien Plateau

Qinghai-Tibet plateau is the most sensitive and driving active area to the global environments. The establishment of improved pastures and coupling between plant and animal production levels should be an urgent task in this area today. To study the mechanism of system contrary and the mode of optimum coupling is one of the key research directions in the field of grassland agricultural ecology. A fundamental measure for achieving the sustainable development and utilization of grassland resources and social economy in Qinghai-Tibet Plateau is to establish and improve the grassland agricultural system, to put more matter and energy into the system frequently for promoting system coupling between subsystems, increasing system order, producing system evolution and releasing catalytic potential, the potential of position difference, multi-stabilization potential and managing potential of the system.Basing on the interface theory of grassland agricultural system and the regulation and controlling theory of animal nutrition, the effects of RE on system coupling of forage / livestock interface in alpine grassland were studied in southern Gansu, China, by taking the methods of applying REO (38%) to natural and seeded pastures, grazing the treated pasture with Tibetan sheep, and then evaluating the efficiency of forage and animal production and, at the same time, determining the accumulation and transferring of REE from the soil -- forage– animal system. The results in this study are as follows:1, Forage grass growth was promoted by applying RE properly to natural grassland. The above-ground biomass of Drooping lymegrass (Elymus nutans Griseb. ) raised with RE concentration in extent of 4 00×106...