摘要
针对我国农业生产中面源污染严重的问题,以多孔生态混凝土为基质构建农田生态排水沟,研究新型农田生态排水沟对稻田排水中氮磷的去除效果及机制。结果表明,基于多孔生态混凝土技术构建的生态排水沟对稻田排水中TN、TP的去除率大于土质及混凝土排水沟,有效增强了对稻田排水中氮磷的去除效果。稻田施肥后10 d,生态排水沟对稻田排水中TN的去除率均值为86.57%,分别较土质(82.05%)及混凝土排水沟(83.55%)增加4.52%及3.02%;对稻田排水中TP的去除率均值为37.86%,分别较土质(25.62%)及混凝土排水沟(33.53%)增加12.24%及4.33%。研究结果完善了农田生态排水沟的构建技术,可为农业面源污染防治提供技术指导。
The effect and mechanism of eco-ditch based on ecological concrete are investigated to solve serious agricultural non-point source pollution. The eco-ditch based on ecological concrete is more effective in removing nitrogen and phosphorus in paddy field drainage. The eco -ditch has obtained higher TN and TP removal than soil ditch and concrete ditch. The removal of TN for eco-ditch is 86.57%, which is 4.52% and 3.02% higher than those of soil ditch and concrete ditch. The removal of TP for eco-ditch is 37.86%, which is 12.24% and 4.33% higher than those of soil ditch and concrete ditch. The construction technology has been improved by this study, which can be used effectively to reduce agricultural non-point source pollution.
出处
《中国农村水利水电》
北大核心
2017年第5期14-16,21,共4页
China Rural Water and Hydropower
基金
南京水利科学研究院基本科研业务费专项资金项目(Y914004)
水利部技术示范项目(SF-201617)
江苏省环保科研课题项目(2015033)
关键词
稻田
生态排水沟
农业面源污染
paddy field
eco-ditch
agricultural non-point source pollution
