该论文来源于网络，本站转载的论文均是优质论文，供学习和研究使用，文中立场与本网站无关，版权和著作权归原作者所有，如有不愿意被转载的情况，请通知我们删除已转载的信息，如果需要分享，请保留本段说明。 摘 要：在天津市玉米良种场进行了田间小区试验，研究不同氮肥用量对鲜食玉米产量及养分吸收的影响。研究结果表明：（1）施用氮肥可以显著提高鲜食玉米产量及干物质量，与对照（CK）处理相比较，产量提高1 575 kg·hm-2～3 500 kg·hm-2，%～%;干物质量提高1 kg·hm-2～2 kg·hm-2，%～%;施氮量为195 kg·hm-2时，鲜食玉米产量及干物质量最高，为17 500 kg·hm-2，8 kg·hm-2，比对照（CK）%%;（2）施用氮肥可以显著提高鲜食玉米氮吸收量，当施氮量为195 kg·hm-2时，氮素吸收量最高，施氮量为234 kg·hm-2时与其相仿;（3）随施氮量的增加，鲜食玉米氮肥利用率逐渐降低，施氮量为195 kg·hm-2时，%。因此，综合产量、干物质量，氮素吸收量、氮肥利用率等指标在本试验条件下施氮量为195 kg·hm-2时效果最佳。 关键词：鲜食玉米;产量;施氮量;氮肥利用率 中图分类号：S513 文献标识码：A DOI 编码：.1006- Abstract： A field plot experiment was arranged in the corn farm in Tianjin， to study the effect of different nitrogen fertilizers on fresh corn yield and nutrient absorption. The results showed as follow： （1） The application of nitrogen fertilizer could significantly increase the yield and dry matter weight of fresh corn. Compared with the treatment without nitrogen fertilizer （CK）， the yield increased by 1 575～3 500 kg·hm-2， %～%; the dry matter weight increased by 1 ～2 kg·hm-2， %～%; When the amount of nitrogen applied was 195 kg·hm-2， the fresh corn yield and dry matter weight were the highest， which were 17 500 kg·hm-2 and 8 kg·hm-2， compared with CK， which increased % and %. （2） The application of nitrogen fertilizer could significantly increase the nitrogen absorption of fresh corn. When the nitrogen application was 195 and 234 kg·hm-2， the nitrogen absorption was the same. （3） With the increase of nitrogen application rate， nitrogen use efficiency gradually decreased. When the nitrogen application rate was 195 kg·hm-2， nitrogen use efficiency was %. Therefore， under this test condition， nitrogen application rate was 195 kg·hm-2， it can obtain the highest yield， dry m
