Abstract: With the combination of geographical information system (GIS) and analytical hierarchy process (AHP), the eco-environmental sensitivity of Central Guizhou Province was evaluated comprehensively. A total of fifteen indices in 4 categories were selected to set up an indices system. The weight of each selected index and the value of each evaluation cell were calculated by AHP, and the eco-environmental sensitivity evaluation map was built by GIS. The spatial variation pattern of the sensitivity was analyzed from the aspects of soil erosion, rocky desertification, biodiversity, habitat and acid rain. The results indicated that in Central Guizhou, biodiversity and habitat had the highest sensitivity, followed by soil erosion and acid rain, and rocky desertification, which could provide a theoretical basis for the reasonable utilization of natural resources, layout of industry and agriculture, and sustainable development of this region.

Key words: Phytase, Strain screening, Solid state fermentation, Optimal conditions of phytase-producing