摘要
通过林带对太湖地区农业非点源污染的控制效应研究,结果表明:农田生态系统中N、P等主要水污染物的迁移、淋失状况随轮作方式、作物种类及施肥状况而变化;农田与沟渠间的缓冲林带有利于截留和净化土壤径流中的N、P等物质,从而在一定程度上控制农业非点源污染。杨树生长快、用途广,适于太湖地区营造水环境保护林带。根据缓冲林带模型研究结果,农田与林带宽度比例(100～150)∶40或(150～200)∶60较为合理,这种模型既能少占耕地,又能净化水质、保护生态环境。
Through the research on the the controlling effects of shelter forest on nonpoint source pollution of agricultural lands in Taihu Lake area,we get some conclusions:The transfer and loss of N and P(main water pollutants) vary with means of rotation,types of crops and the amount of fertilizer.Shelter forest betweens farmlands and ditches can effectively stop and purify such elements as N and P in soil runoffs,thus controlling nonpoint source pollution of agricultural lands.Poplars with the characteristics of quickgrowing and high value are suitable to be planted as shelterforest in Taihu Lake Watershed.Based on the model of shelter forest,the width ratio of farmland to shelter forest is either between 100∶40 and 150∶40 or between 150∶60 and 200∶60. Such a model can not only save more farm land,but also purify water quality and protect ecological environment.
出处
《南京林业大学学报（自然科学版）》
CAS
CSCD
北大核心
2002年第6期17-20,共4页
Journal of Nanjing Forestry University：Natural Sciences Edition
基金
江苏省环保科技发展基金[2000(二)0009]
江苏省自然科学基金资助项目(BK2002022)
关键词
林带
太湖地区
农业
非点源污染控制
富营养化
Agricultural non-point source pollution
Ultrophication
Shelter forest
Taihu Lake area
