The social and economic sustainable development in the arid and semiarid area in China has been restricted by sandy desertification heavily. The studied site (DUOLUN county) has distinct geographical position and special terrain and geomorphic, so studying in this area plays the important role in the research on the sandy desertification in northern China, especially for grassland. It was studied integratedly on sandy desertification interference according to the principle and methods of community ecology, ...