摘要
稻田排水中携带的大量氮、磷元素造成水稻灌区严重的农业面源污染。提出运用稻田节水灌溉-田间排水草沟-塘堰湿地-生态骨干排水沟"四道防线"系统净化稻田排水水质,在湖北漳河灌区进行了对此系统的净化效果试验。试验结果表明,"四道防线"模式下的各子系统不仅在单独环节具有消减污染物效果,而且每道防线子系统协同运行,综合系统对改善水稻灌区水环境效果显著,对总氮、总磷、铵态氮和硝态氮的消减分别为92.3%、82.8%、94.4%和64.6%。
A large amount of nitrogen and phosphorus in discharged water form paddy field cause serious agricultural non-point source pollution. A ＂Four Defense Lines＂ system of water-saving irrigation, field grass ditches, pond wetlands and ecological trunk ditches to purify the water discharged form paddy field is proposed in this paper. Experiment on the effect of reducing the pollution of drainage water form paddy field with this system has been conducted in Zhanghe Irrigation System, Hubei Province, China. Accord- ing to the result of the experiment, each subsystem under the ＂Four Defense Lines＂ mode is effective in re- ducing contamination, and the comprehensive system also has satisfactory effect on improving the water environment in paddy irrigation. The effects of reducing of total nitrogen, total phosphorus, ammonia ni- trogen and nitrite nitrogen by comprehensive system are 92.3%, 82.8%, 94. 4% and 64.6% respectively.
出处
《灌溉排水学报》
CSCD
北大核心
2011年第6期1-5,共5页
Journal of Irrigation and Drainage
基金
国家自然科学基金项目(50839002)
关键词
四道防线
面源污染
氮磷消减
节水灌溉
生态排水沟
塘堰湿地
four defense lines
agricultural non-point source pollution
nitrogen and phosphorus mitigation
water-saving irrigation
ecological ditch
pond wetland
