农业环境科学学报2009，Vol.28Issue(10)：2138-2144,7.
水肥综合管理对减少滇池北岸韭菜地氮磷流失的研究
Integrated Management of Water and Fertilizer to Reduce Nitrogen, Phosphorus Loss from Chinese Chive Field in the North Bank of Dianchi Lake
摘要
Abstract
The nitrogen(N) and phosphorus(P) release to surface waters from farmland not only leads to the declining of utilization rate of fertilizer, but also results in the raising of agriculture cost, as well as leads to the pollution and eutrophication of freshwater bodies. Effects of different fertilizing modes and ditch utilization patterns on controlling the pollution N and P from surface runoff in connecting with high chem-ical fertilizer dosage applied in Dianchi Lake region were investigated through field experiment with natural and artificial simulated rainfall. The result showed that compared with surface application of chemical fertilizer,right amount manorial together with chemical fertilizer, and subsoil fertilization could reduce the concentration of total nitrogen(TN) and total phosphorus(TP) in runoff by 53% and 39%. The first week after fertilization was the main duration of N, P loss by runoff, then, the risk reduced by time. Recycle nutrients and water in runoff back into the field through rebuilded ditch could reduce the amount of runoff more than 76%, as well as increase the utilization rate of fertilizer.关键词
施肥/控制排水/滇池非菜地/氮磷流失Key words
fertilizer application/ controlled drainage/Chinese chive field in Dianchi Lake/ nitrogen and phosphorus loss分类
资源环境引用本文复制引用
石艳平,段增强..水肥综合管理对减少滇池北岸韭菜地氮磷流失的研究[J].农业环境科学学报,2009,28(10):2138-2144,7.基金项目
国家科技支撑计划课题(2008BADA6B02) （2008BADA6B02）
