Grassland Coverage Changes and Analysis of the Driving Forces in Maqu County

Vegetation coverage is an important indicator of weighting ecological environment; grassland ecosystem plays an important role in regional ecological safety and sustainable development. Statistics was used to analysis the grassland coverage changes in Maqu County. Results showed that: 1) the grassland coverage show decreasing trend overall, and has period characteristics; 2) changes in grass coverage both have positive and negative conversion, depending on using rationality of grassland resource; 3) Climate warming and drying and irrational exploitation activities are the main driving factors of ecological environment deterioration; 4) Prohibition grazing project have obvious effect on grassland restoration.