氮肥施用方式对玉米产量和肥效的影响

对氮肥不同施用方式下玉米产量和氮肥效率进行研究，结果表明：在试验条件下氮肥基施和追施中，各施氮处理均较对照增产，但以施用尿素150kg/hm2产量最佳，且两施氮时期间产量差异不显著；氮肥基施和追施中，玉米籽粒产量氮反应指数、生物产量氮反应指数和氮肥农业效率均随施氮量增加呈下降趋势，但与前两者不同的是氮肥农业效率在各施氮量间的差异显著。因此，为达到较好增产效果应控制氮肥施用量，同时可以将氮肥以基施形式施入，从而减小玉米生产中工作量。

Effect of N-fertilizer Application Patterns on Yield and N-fertilizer Efficiency of Corn

Under different nitrogen application patterns, the yield of corn and the nitrogen fertilizer's efficiency were analyzed. The results indicated that the yield of N-fertilizer treatments were higher than no N-fertilizer in basal and dressing application. The yield by 150kg/hm2 urea application was the highest in all treatments. The yield was insignificant differences between basal and dressing nitrogen application. The nitrogen response index (NRI) of grain yield, The NRI of straw and the agronomic N use efficiency (AEN) felled with amount of N-fertilizer application. The difference of AEN was significant between different amount N-fertilizer applications. The controller of amount of N-fertilizer application is necessary in order to optimum efficiency of increase production. The basal nitrogen application should be separated f-or reducing operation capacity of corn production.