Study of Fragile Ecosystem Reconstruction Technology in the Karst Peak-cluster Mountain
岩溶峰丛山地脆弱生态系统重建技术研究

The land arrangement of over 1500 hm2 karst peak-cluster demonstration area in Guohua of Pingguo, Nongla of Mashan and Guzhou of Huanjiang, Guangxi, was completed. Lots of techniques and methods were studied and put into practice in 2008, such as land consolidation, exploitation of five epikarst springs, construction of more than 3000 m3 water tanks and utilization of biological mulching technology to extend the soil water retaining phase. Meanwhile, more than 400 hm2 forests were cultivated on the basis of collection and direct sowing of 200 kg seeds and artificial induction, and a plant area of more than 200 mu was cultivated by introducing 20 kinds of forage species. With these techniques and methods, some good results were achieved. A new ecological industry was formed, many economic crops like Hyloceseus, Lonicera japonica, Ilex Latifolia Thunb, piqeon pea, Clausena lansium and grass were planted for breeding cattle. As a result, the ecological rehabilitation model and matching technology have been perfected in peak-cluster depressions under different conditions, the annual mean income of local people has increased by 20%, rocky desertification has been controlled and eco-environmental monitoring has been strengthened. Significant progress has been made in quite a few research aspects, such as the change of karst environment and soil quality, the process of soil and water loss, the utilization and movement of water in the ecosystem, and the vulnerability and ecological service function evaluation of the karst ecosystem. In addition, more than 30 papers have been published and 12 postgraduates have been trained.