摘要
采用熵技术法对高泉小流域治理的水土效益进行评价。结果表明:高泉小流域生态恢复的水土效益指数为51.0,其水土效益指数排序为:林草地生态恢复效益>土壤水分含量>土壤养分效益>农田土地生产力效益。说明生态恢复治理措施对农田土地生产力和土壤养分效果,较之于土壤水分和林草地植被恢复效益低。这种评价结果比较符合当地实际,也说明该小流域通过治理后处于生态稳定阶段。
In this paper, the entropy technology is used to assess the water and land benefits in improving the Gaoquan small drainage basin. The results show that the index of water and land benefits in regenerating the ecology in the Gaoquan small drainage basin is 51.0, in which the indexes of vegetation regeneration of forests and grasslands, soil moisture content and productivity of farmlands are 16.77, 12.5 and 10.83 respectively. The indexes of water and land benefits are in an order of the benefits of regenerating ecology of forests and grasslands 〉 benefits of soil moisture content 〉 benefits of soil nutrient 〉 benefits of productivity of farmland. As a whole, the study results reveal that the effects of implementing the measures for regenerating the ecology on the productivity of farmland and soil nutrient are lower than the effects of soil moisture content and vegetation regeneration of forests and grasslands, and such assessed results accord with the local actuality. The results also reveal that the ecology is stable after the small drainage basin is improved.
出处
《干旱区研究》
CSCD
北大核心
2009年第6期799-803,共5页
Arid Zone Research
基金
国家"十五"科技攻关计划"定西黄土丘陵沟壑区高效农业生态区建设研究"课题(2001BA901A18)
关键词
熵技术
水土效益
生态恢复
高泉小流域
定西市
entropy technology
water and land benefit
ecological restoration
small drainage basin.
