Effect of tri-dimensional eco-agriculture pattern in Karst peak-cluster zones——A case study of Guohua Demonstration Area in Pingguo County,Guangxi Zhuang Autonomous Region

The tri-dimensional eco-agriculture in Guohua Demonstration Area comprises foodstuff crop-economic crop-pasture pattern,fruit-herb pattern and forest-pasture-livestock and poultry pattern.These three eco-agriculture patterns make the most use of light,heat,water and soil in the peak-cluster depressions of Guohua.Analysis of a four-year tri-dimensional eco-agriculture pattern shows that the system greatly improves the ecological environment of Guohua Demonstration Area,vegetation coverage rate increases to 50% ~ 70% in 2005 from 10% in 2000.Annual net income of farmers rises from 632 yuan to 1 524 yuan in 2005.The tri-dimensional eco-agriculture greatly emphasizes on mutual beneficiality between the environment and economy when compared to traditional agriculture.