Present situation and dynamic of grassland resources in Haixi national municipality of Mongol and Tibetan in Qinghai province

Based on field survey and grassland monitoring data from 2005 to 2009 in Haixi national municipality of Mongol and Tibetan,Qinghai province,grasslands in this regions were classified into 6 types,and they were alpine steppe,temperate steppe,temperate desert steppe,alpine meadow,low-land meadow and alpine meadow steppe.The available grassland areas were decreased continually and were decreased by 226 070 000 in 2008 and 169 310 000 hectare in 2009,respectively when compared with available grassland area in 2007.Overgrazing was common in the last 5 years,and 13 970 000,26 560 000 and 33 940 000 sheep unit were overloaded on the grassland in 2005,2007 and 2009.The grassland eco-environment became badly worse due to degradation and desertification in different degrees.According to present situation of grassland resources in Haixi national municipality of Mongol and Tibetan,this study proposed that enclosure grassland,establishment pasture,and plan grazing were measures for grassland management,and improved the grassland situation.