The growth and reproduction of Stipa krylovii on a grazing gradient,that is,no grazing(NG),light grazing(LG),moderate grazing(MG),and heavy grazing(HG),were studied in 1995 on a tylical steppe dominated by Stipa krylovii .This research was carried out on a series of comparative sampling plots along with a spatial gradient of grazing.The results showed that over grazing for years was always associated with tussock fragmentation,size miniatwing,the process of tillering nodes going up near to the soil ...