青海省大通县退耕还林生态功能综合评价  

Evaluation of Ecological Functions in Returning Farmland to Afforestation Project Area in Datong County of Qinghai Province

作　　者：李世荣[1] 李文忠[1] 李福源 赵万启 周心澄[1] 

机构地区：[1]北京林业大学水土保持学院,北京100083 [2]青海大通县林业旅游局,青海大通810100

出　　处：《水土保持通报》2006年第2期65-68,84,共5页Bulletin of Soil and Water Conservation

基　　金：国家"十五"攻关课题项目(2001BA510B0102)

摘　　要：根据生态经济学原理,采用层次分析法(AHP),建立了黄河上游退耕还林还草综合生态效益评价指标体系和数学模型。以青海大通县为例,对天然云杉林、退耕林地、天然荒草地、天然灌丛等植被类型进行综合生态效益评价,与农田生态系统进行对比研究。评价结果表明:天然云杉林、退耕林地、天然灌丛等类型的生态效益指数均大于农田生态系统,其综合生态效益指数排列顺序为,天然云杉林>退耕林地>天然灌丛>农地>天然荒草地。这一研究结果可为黄河上游退耕还林生态工程建设提供参考。On the basis of the theory of eco-economics and by the applying analytic hierarchy process(AHP),an evaluation index system and an evaluation model for compreneasive ecological benefits of the returning farmland to afforestation in the upper reaches of the Yellow River are proposed.A case study was carried out in Datong County,Qinghai Province,for comprehensive ecological benefits of the returning farmland to afforestation in the vegetation types of nature spruce forests,reuse farmland for woodland,natural wasteland and natural shrub in comparison with the agro-ecosystems.Results show that ecological benefit indexes of all the vegetation types,such as natural spruce forests,reuse farmland for woodland,natural wasteland and natural shrub,are higher than that of the agro-ecosystem.The comprehensive ecological benefit indexes are in an order of natural spruce forests>reuse farmland for woodland > natural shrub > farmland > natural wasteland.The study results can be referred for the ecological regeneration project of the returning farmland to afforestation in the upper reaches of the Yellow River.

关 键 词：退耕还林 生态效益 评价指标 

分 类 号：S157[农业科学—土壤学] S42[农业科学—农业基础科学]