The analysis of increase production effect and N benefit of different treatment show: The best treatment is basic fertilized 150kg/hm~2, supplemental fertilized 300kg/hm~2. The yield of this treatment is 44.8kg/kg N.

• 对各处理玉米增产效果及氮肥效益的分析表明:底肥150kg/hm~2；追肥300kg/hm~2处理的氮肥效益是最高的；达到了施入每公斤氮产出玉米44.；8公斤的水平。