Comprehensive improving technique to rocky desertification in karst peak-cluster depression -A case study at Guohua Ecological Experimental Area,Pingguo, Guangxi

With typical karst peak-cluster depression landform,poor people and heavy rocky desertification, Guohua Ecological Experimental Area in Pingguo county, Guangxi is about 600 hm^2. Since 2001, the Eco- logical Experimental Area has been built. After investigation and researches to the environments and regional economics in detail, the stereo eco-agricuhure in different geomorphologic position of the peak-cluster depression is considered as an available model for the comprehensive improvement to rocky desertification. Meanwhile, a lot of related technique and methods for the improvement of environments and the development of agriculture are imported, studied and put into practice, such as forestation of 310 hm^2 hills, exploitation of more than 10 000 m^3/a karst water resource, development of ecological industry, planting of grassland for breeding of domestic animals, and improvement of karst soils. For about four years, the comprehensive improvement of rocky desertification in the experimental area has achieved good results. The vegetation is grad- ually restored, the annual mean income of the local people has increased by about 20%, and the new local ecological industry is formed.