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本试验用不同量缓释尿素在玉米播种时一次性基施,同时以不同施氮量作对照,比较缓释尿素对玉米生长发育及产量的影响。主要结果如下:缓释尿素一次基施对玉米籽粒产量和生物产量均有增产作用。不同量的缓释尿素一次基施下玉米籽粒产量氮反应指数和氮肥农业效率随尿素施用量增加呈下降趋势。玉米生产收益和利润均随尿素施用量的增加呈下降趋势。
In this experiment, different amounts of slow-release urea were applied in maize sowing once. At the same time, different amount of nitrogen was used as a control to compare the effects of slow release urea on the growth and yield of maize. The main results are as follows: A slow-release urea based on corn yield and grain yield both have an increase yield. Different amount of slow-release urea primary base applied corn yield nitrogen response index and nitrogen efficiency of agriculture with the urea application rate decreased. The yield and profit of maize decreased with the increase of urea application.