Soil Degradation and Reconstructive Way on Karst Environment in Southwest China

Karst is one of the weakest kind of ecological environments and one of the main factors that restrict economic development in south west China, which widely distributes in China, especially in Yunnan,Guizhou,Guangxi province. Although many researches on karst environment have been done, there is little study on the soil degradation. Therefore, this paper first expounds the basic features of karst eco environmental fragilities in southwest China, its causes and mechanism of soil degradation, then puts forward the reconstructive way and the key problems of soil degradation research in Karst environment according to the requirements of eco environment construction in west development of China.