桂滇黔脆弱生境草地农业系统持续性研究

广西、云南、贵州三省交界地区 ,由于特定的地质、地貌、气候、生物和人类活动等因子的综合作用 ,使这里的原始喀斯特森林自然地理景观 ,逐步演变成了现代的土地石漠化、物种简单化、生境脆弱化现状1,2 ]。对于这样的脆弱生态环境如果不采取有效的控制措施 ,在现有高度密集的人口压力下 ,就会不可避免地导致其环境进一步恶化和当地经济的贫困化3]。近年来有些研究指出4～ 7],草地农业对于恢复和改善退化土地的生产性能 ,提高大农业系统的生物学效率具有良好的作用。尤其在我国西南贫困山区 ,发展草地农业有利于促进当地农村环境、资源、…

Sustainability of Grassland Agriculture System in Vulnerable Ecological Environment of Guangxi,Yunnan and Guizhou Provinces

Based on the investigation data and relevant statistical data recently, with the methods of principle components analysis and cluster analysis, the present situation of grassland agriculture development and its sustainable degree of 30 poor counties located in karst mountains of Guangxi, Yunnan and Guizhou Provinces was studied. In the light of universal situation of the 30 poor counties, the index system of population, resources, environment, social and economic development for evaluating the sustainability degree of the local grassland agriculture system were determined preliminarily. By analyzing and calculating, the comprehensive index of grassland agriculture system sustainability of every county among the 30 poor counties have been obtained, and the comprehensive classification, order and evaluation for the present sustainable development degree of the 30 poor ones have been carried out.