摘要
为研究工程措施对小流域农业面源污染的综合治理作用,在三峡库区典型小流域内进行土地整理方面的工程布设,研究了工程措施对农业非点源氮磷的截留效应。结果表明:工程措施能够对三峡库区小流域内氮磷的流失起到截留作用,对径流和泥沙中全氮和总磷的截留作用显著。工程措施对径流全氮的截留强度为3.43kg/hm2,总磷的截留强度为0.098kg/hm2;对泥沙全氮的截留强度为6.73g/hm2,总磷的截留强度为1.24g/hm2。工程措施对氮的截留效果好于磷。研究结果为从工程方面治理三峡库区小流域农业面源污染提供了理论依据。
For the study of comprehensive control of engineering measures to the agricultural non-point source pollution of small watershed,engineering measures in the small watershed of Three Gorges area were carried out to study the interception effect for nitrogen and phosphorus.The results showed that engineering measures could intercept loss of nitrogen and phosphorus.Engineering measures on the closing stock of nitrogen run off intensity was 3.43kg/ hm2,the closing stock of phosphorus run off intensity was 0.098kg/hm2,and engineering measures on the closing stock of nitrogen sediment intensity was 6.73g/hm2,the closing stock of phosphorus sediment intensity was 1.24g/hm2,which was better on the role of nitrogen sequestration than phosphorus.The results provided theoretical basis for management of agricultural non-point source pollution form engineering measures in Three Gorges area.
出处
《农业工程》
2013年第2期46-49,共4页
AGRICULTURAL ENGINEERING
基金
国家科技重大专项课题(项目编号:2012ZX07104003)
国家"十二五"科技支撑项目(项目编号:2012BAD15B04003)
关键词
三峡库区
工程措施
氮磷
截留
Three Gorges area,Engineering measures,Nitrogen and phosphorus,Interception
