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作 者 ：李青军 张炎 胡伟 孟凤轩 冯广平 胡国智 刘新兰

期 刊 ：植物营养与肥料学报 2011年 17卷 3期 页码：755-760

关键词：氮素；玉米；吸收分配；产量；

Keywords:nitrogen, maize, nitrogen uptake and distribution, yield,

摘 要 ：田间小区试验，研究了氮素运筹对玉米干物质累积、氮素吸收分配及产量的影响。结果表明，施氮和有机肥可以延长干物质积累的旺盛时期，使玉米干物质总量积累速率最大的时刻推后1～3d，增加了玉米的干物质积累量。氮肥配施有机肥能延长氮素积累的旺盛时期，其中，N2+M处理氮素积累的旺盛时期△t分别比N0、N1、N2、N3和FP处理延长了6、4、6、1和7d，该时段吸N量比FP处理增加 0.25 g/plant，比等氮量的N2处理增加0.24 g/plant。播前施有机肥 30 t/hm2，在减 N 26.83%的情况下，玉米吸氮量比常规施肥（FP）提高 6.52%，氮素利用率达54.31%，高于常规施肥的 33.27%；玉米增产24.12%，比常规施肥增收2696元/hm2。

Abstract:The effects of nitrogen management on maize dry matter accumulation, nitrogen uptake and distribution and maize yield were studied through a plot field experiment. The result showed that application of nitrogen fertilizer and organic matter could prolong the vigorous time of dry matter accumulation, postpone the maximum accumulation rate by 1~3d compared to the other treatments. Application of N combined with organic fertilizer could also delay the time of maximum N accumulation rate, prolong the vigorous period of N accumulation. The treatment of N2+M prolonged the vigorous period of N accumulation △t by 6 d、4 d、6 d、1 d、7 d compared to N0、N1、N2、N3、FP treatments respectively, increased the nitrogen uptake by 0.25 g/plant compared to FP treatment, and by 0.24 g/plant compare to treatments with equal N rate. Using organic fertilizer 30 t/hm2 as base fertilizer, under the condition of N application rate reduced 26.83%, enhanced the N uptake by 6.52% compare to the local conventional fertilization. The nitrogen utilization was 54.31% which was 33.27% higher than that under conventional fertilization, It could also increase he maize yield by 24.12% and the income by 2696 yuan/ha compare to conventional fertilization.

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