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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，施氮肥７天后．即有硝态氮的移动，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－１的限额，易使地下水污染。但淋失量不高。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 under different nitrogen sources, different varieties, fertilizing methods and compounding conditions. The results showed that nitrogen fertilizer after 7 days. That is, the movement of nitrate nitrogen, leaching occurs mainly in the rainy season. Leaching loss increased with the increase of fertilizer application, but different varieties and fertilization methods were different but not significant. Nitrogen fertilizer with phosphorus, potassium and organic fertilizer, can significantly reduce the nitrate leaching. Nitrogen 247.5kgha-1 leaching water nitrate content exceeds the drinking water health standards 10mgL-1 limits, easy to make groundwater pollution. However, leaching loss is not high. Nitrogen 165kgha-1, with phosphorus, potassium or organic fertilizer, more than 15% more nitrogen than nitrogen, nitrogen utilization rate increased by 20 percentage points or more.