中国稻米

中国稻米 ›› 2014, Vol. 20 ›› Issue (5): 22-26.DOI: 10.3969/j.issn.1006-8082.2014.05.005

• 专论与研究 • 上一篇    下一篇

氮肥运筹对鄂南直播稻生长、产量及氮素吸收的影响

  1. 华中农业大学资源与环境学院/农业部长江中下游耕地保育重点实验室，武汉 430070
  • 出版日期:2014-09-20 发布日期:2014-09-20
  • 通讯作者: 李小坤
  • 基金资助:

    公益性行业（农业）科研专项（201303103）；中央高校基本科研业务费专项（2011PY150；2013PY113）；长江学者和创新团队发展计划（IRT1247）

Effect of Nitrogen Application Regime on the Growth, Yield and Nitrogen uptake of Direct-seeding Rice in the South of Hubei Province

  • Online:2014-09-20 Published:2014-09-20

PDF

摘要： 采用田间试验，研究了氮肥运筹对直播稻生长、产量及氮素吸收的影响，以期为氮肥的合理施用提供依据。结果表明，施用氮肥增产效果明显，与不施氮处理（T1）相比，平均增产1 010 kg/hm2，增产率17.0%，其中氮肥分3次施用的处理增产效果最佳，增产1 468 kg/hm2，增产率24.7%；氮肥的施用能够显著增加水稻吸氮量，各施氮处理在苗期、分蘖末期、齐穗期和收获期吸氮量与T1相比分别增加34%、125%、80%和39%；氮肥的合理运筹显著提高了氮肥吸收利用率，与氮肥全部作基肥处理相比，氮肥50%作基肥、30%作苗肥、20%作分蘖肥（T4）和氮肥35%作基肥、30%作苗肥、15%作分蘖肥、20%作穗肥（T5）分别提高了22个和28个百分点。综合分析认为，本试验条件下，T4处理的氮肥运筹效果最好，可以在鄂南直播稻生产上推广应用。

关键词: 直播稻, 氮肥, 产量, 氮肥利用率

Abstract: A field experiment was conducted in Chibi city, to study the effects of nitrogen （N） application regime on the growth, yield and N uptake of direct-seeding rice in the current production conditions in order to provide evidence for scientific application of N fertilizer. The results showed that the application of N increased the yield significantly by 1 010 kg/hm2 and 17.0% compared to that of the treatment of no N （T1）. And the increase of yield of the treatment of total N splited 3 times was the most, increased by 1 468 kg/hm2 and 24.7%. The N uptake of the treatment of N application in the stage of seeding, tillering, full heading and harvest were increased by 34%, 125%, 80% and 39% compared to that of the T1 treatment. Reasonable application of N improved the nitrogen fertilizer use utilization significantly. The N recovery efficiency of the treatment of split application （T4 and T5） were increased by 22 and 28 percentage point compared to that of the treatment of total N as basal fertilizer. Under the trial condition, the treatment of 50% of total N as basal fertilizer, 30% as seedling fertilizer and 20% as tillering fertilizer was the best, and it is worthy of extending to application.

Key words: direct-seeding rice, nitrogen, yield, nitrogen use efficiency

中图分类号: