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本项研究通过在京郊顺义、通县两个粮食高产县进行夏玉米不同品种、肥料种类和施肥方法的处理与不施肥空白（ＣＫ１）和目前当地生产上常规施肥数量、方法作对照。共计７个处理，进行大田示范对比３次重复。结果表明：长效碳铵一次底施增产效果最明显，比当前生产常规对照亩增产９１．４ｋｇ，亩增纯收入１０９．４元。是一种高产、高效施肥技术方案。分析结果认为：当前氮肥利用率低的原因除氮素挥发、流失、反硝化外，主要是作物的品种产量有限，不能充分吸收利用土壤中的有效养分。目前提高化肥利用率的切实有效措施是：高肥效品种＋长效稳态氮肥＋化肥深施
In this study, CKD was conducted in two grain-high-yielding counties in Shunyi and Tongxian counties in Beijing, and the treatment methods of fertilizer type and fertilization method were compared with CK1 and the conventional fertilization quantity in local production. A total of seven processing, field demonstration compared to three replications. The results showed that the long-acting ammonium bicarbonate had the most obvious increase in yield at the same time, which increased 91.4kg than that of the conventional control mu and increased the net income by 109.4 yuan per mu. Is a high yield, high efficiency fertilization program. The results show that: the reasons for the low utilization rate of nitrogen fertilizer are not only the volatilization, loss and denitrification of nitrogen, but also the limited yield of the main crop varieties, which can not fully absorb the available nutrients in the soil. The current effective measures to improve the utilization of chemical fertilizers are: high fertilizer varieties + long-term steady-state nitrogen fertilizer + fertilizer application