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Silent crisis desertification and degeneration of grasasland

ZHANG Zi he (Gansu Grassland Ecological Institute, Lanzhou Gansu 730020 China)  
The concept, reason and relationship of desertification and degeneration of grassland were discussed. In addition to the overgrazing, extreme reclamation and disafforestation, the reduce of water resources was also the main reason of desertification and degeneration in grassland around oasis. The ‘desert type’, ‘salinization type’, ‘block soil type’ and ‘noxious and miscellaneous grass type’ were the main type of grassland degeneration. The desertification and degeneration of grassland were the silent crisis and threatened the subsistence and development of people. Grassland was the first one to be affected by desertification and thereby it should be the first step to control the degeration of grassland in order to control the desertification.
【Fund】: 国家自然科学基金重点项目! (396 30 2 5 0 )
【CateGory Index】: S812.6
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