横垄耕作的面源污染截留效应研究  

Interception Effects of Non-Point Source Pollution of Contour Farming

作　　者：杨育红[1] 阎百兴[2] 严登华[3] 

机构地区：[1]华北水利水电学院水利学院,河南郑州450011 [2]中国科学院东北地理与农业生态研究所,吉林长春130012 [3]中国水利水电科学研究院水资源研究所,北京100038

出　　处：《中国水土保持》2012年第9期46-47,77,共2页Soil and Water Conservation in China

基　　金：国家"十二五"科技支撑计划课题(2012BAC19B03);华北水利水电学院高层次人才科研启动项目(001289)

摘　　要：为了解横垄耕作的面源污染截留效应,选取吉林省长春市莫家沟小流域横垄耕作坡耕地为研究区,应用210Pbex核素示踪技术得到研究区土壤侵蚀模数为2 268 t/(km2.a),吸附态氮、磷流失负荷分别为4 889、2 022 kg/a;运用RU-SLE2.0模型,模拟在同等立地条件下顺坡耕作土壤侵蚀模数约为6 200 t/(km2.a)。对比结果表明:横垄耕作较顺坡耕作可减少约63%的土壤流失量及随土壤流失的吸附态氮磷负荷。In order to understand the interception effects of non-point source pollution of contour farming,the paper selected Mojiagou Small Watershed in Changchun City of Jilin Province as a studied area and obtained the soil erosion modulus as 2 268 t/(km2·a) and the loss load of adsorbed nitrogen and phosphorus as 4 889 kg/a and 2 022 kg/a respectively of the area by using 210Pbex nuclide tracing technique.The soil erosion modulus of downslope tillage simulated with the same site factors was 6 200 t/(km2·a) by using RUSLE 2.0 model.The outcomes show that comparing with downslope tillage,the soil loss and the loss load of adsorbed nitrogen and phosphorus of contour farming can be reduced by 63%.

关 键 词：核素示踪技术 RUSLE2 0模型 吸附态氮磷 横垄耕作 顺坡耕作 面源污染 东北地区 

分 类 号：X592[环境科学与工程—环境工程]