赤水市水土保持生态修复工程生态效益评价研究

以赤水市水土保持生态修复工程为依托,对水土保持生态修复效益评价方法进行了探索,建立了开展水土保持生态修复工程生态效益调查、评价的基本技术与方法。评价中坚持了客观性和系统性原则,以植被覆盖度,生物多样性,群落生物量,土壤有机质,N,P,K含量,表土侵蚀和泥沙含量变化为评价指标,通过野外定位监测获取水土流失、植被覆盖度、生物量等数据,然后采用定量方法评价工程实施产生的生态效益。结果显示,赤水市水土保持生态修复工程的实施,取得了巨大的生态效益,植被覆盖度、生物多样性、生物量、土壤肥力等都有所增加,而土壤侵蚀、泥沙含量等则大幅减少。

Evaluation on Ecological Benefitof Ecology Rehabilitation and Soil Conservation in Chishui City

Based on ecology rehabilitation work in soil and water conservation of Chishui City,the methods about ecological benefit evaluation were explored.The basic techniques and methods of ecological benefit research and evaluation were established.The eraluation adhered to objective and systematic principle, chose indexes of vegetation mulching degree,biological diversity,community biomass,soil organic matter and content of N,P,K and the diversification of surface soil and sediment content,obtained the data about soil and water loss and vegetation mulching degree and biomass,and then estimated the ecological benefits of engineering practices with quantitative method.As a result,engineering practices obtained great ecological benefits,for example,by increasing vegetation mulching degree and biological diversity and biomass as well as soil fertility,and decreasing soil erosion and sediment content,etc.