摘要
植物篱是一项具有改良土壤、保持水土、增加土壤肥力和控制面源污染等生态效益的复合农林技术。遵循层次分析法原理,从改良土壤、保持水土、增加土壤肥力和控制面源污染等方面建立了长江三峡库区坡耕地植物篱系统生态效益评价指标体系,应用熵值法与专家评分法计算评价指标权重,并结合层次分析法对不同类型和不同种类植物篱的土壤改良效益、水土保持效益、土壤养分增加效益和面源污染控制效益及综合生态效益进行了分析评价。结果表明:不同类型植物篱综合生态效益以灌木类植物篱最大,草本类植物篱综合生态效益最小,并且灌木类植物篱的土壤改良效益、水土保持效益、增加土壤养分效益和控制面源污染效益均最大;不同种类的植物篱中,黄荆+臭椿植物篱的综合生态效益最大,而毛豆类植物篱具有较高的增加土壤养分的生态效益,紫背天葵+旱菜植物篱控制面源污染的生态效益最大。
Hedgerow intercropping is a comprehensive agroforestry technique with the eco-benefits of soil lmprov control invento ement,so ling.To e ry plots il particle interception, soil conservation, soil fertility enhancement and non-point pollution valuate the eco-benefits of hedgerows with different categories and species, 42 hedgerow were arranged in the Jiangjin city of the Three Gorges reservoir area. The properties categories and species in the Three Gorges reservoir area were compared according the comprehensive eco- benefits values. The results indicated that, the shrub hedgerows had the best eco-benefits among the hedgerows with different categories, and shrub hedgerows were of excellent benefits in soil improvement, soil conservation, soil fertility enhancement and non-point pollution controlling. Among different species, hedgerows with Vitez negundo and Ailanthus altissima had the best comprehensive eco-benefits,Giycine
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2014年第3期373-379,共7页
Resources and Environment in the Yangtze Basin
基金
国家科技支撑计划重点项目(2008BAD98B01-03)
西南林业大学生态学校级重点学科项目(XKX200902)
关键词
植物篱
水土保持
土壤改良
面源污染控制
效益评价
hedgerows
soil and water conservation
soil improvement
NPS pollution control
eco-benefits assessment
