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本试验采用渗滤池技术，研究氮肥不同用量、不同品种、施肥方式及配比条件下硝态氮的移动规律及其与玉米产量、氮肥利用率的关系。结果表明，淋失主要发生在雨季，淋失量随施肥量的增加而增加，不同品种、施肥方式也有差异，但不显著。氮肥与磷钾及有机肥配施，可明显减少硝态氮的移动淋失．施氮２４７．５ｋｇｈａ－１淋失水硝态氮含量超过饮用水卫生标准１０ｍｇＬ－的限额，易使地下水污染。但淋失总量不高，施氮１６５ｋｇｈａ－１，配施磷钾或有机肥，比单施氮增产１５％以上，氮肥利用率提高２０个百分点以上。
In this experiment, percolation pond technology was used to study the movement of nitrate nitrogen and its relationship with corn yield and nitrogen use efficiency at different dosage, different varieties, fertilizing modes and proportioning conditions. The results showed that the leaching loss occurred mainly in the rainy season, the leaching loss increased with the increase of fertilizer application, and the differences among different varieties and fertilizing methods were not significant. Nitrogen fertilizers combined with phosphorus, potassium and organic fertilizer can obviously reduce the leaching of nitrate nitrogen. Nitrogen 247.5kgha-1 leaching water nitrate content exceeds the drinking water health standards 10mgL- limit, easy to make groundwater pollution. However, the total amount of leaching loss is not high, nitrogen 165kgha-1, with phosphorus and potassium or organic fertilizer, more than 15% more than nitrogen alone, nitrogen utilization rate increased by 20% or more.