以郑黄糯2号为材料,进行玉米追氮量、施用比例及缓释肥料施肥效果的研究。结果表明:在磷肥施用量相等的情况下,播前基施氮肥180kghm2的处理产量最高,较基施氮肥90kghm2增产31.0%,与基施氮肥270kghm2和225kghm2的处理差异不显著,与其他处理之间差异极显著;分次施氮试验中以施氮量180kghm2,基施、拔节期追施、大喇叭口期追施比例为8∶4∶0的处理为最佳,产量、氮肥效益为最高;缓释N肥肥效试验中,各个处理间在植株性状方面均比对照有不同程度的增长,在产量及经济效益上,总施氮量180kghm2各种缓释氮肥的应用效果经济效益最高。 Taking Zhenghuangnuo No.2 as material, the effects of topdressing amount of corn, application rate and fertilization on slow release fertilizer were studied. The results showed that under the same application of phosphate fertilizer, the yield of 180kghm2 was the highest, which was 31.0% higher than that of 90kghm2 based on nitrogen application, and that of 270kghm2 and 225kghm2 under nitrogen application. Not significant, and the difference between the other treatments was extremely significant. The nitrogen application rate of 180 kg  hm2, basal application and jointing stage in sub-graded nitrogen application was 8:4:0 The best yield and nitrogen fertilizer efficiency was the highest. In the experiment of N release fertilizer efficiency, the plant traits all had different degrees of plant growth in comparison with the control. On the yield and economic benefits, the total N application rate was 180 kghm2 Slow-release nitrogen fertilizer application effect of the highest economic benefits.