中国稻米

中国稻米 ›› 2014, Vol. 20 ›› Issue (6): 30-34.DOI: 10.3969/j.issn.1006-8082.2014.06.008

• 品种与技术 • 上一篇    下一篇

施氮量对免耕机插水稻产量形成及氮素利用的影响

  1. 中国水稻研究所/水稻生物学国家重点实验室，杭州310006
  • 出版日期:2014-11-20 发布日期:2014-11-20
  • 通讯作者: 陈惠哲
  • 基金资助:

    国家科技支撑计划项目（2012BAD07B02）；科技部科研院所技术开发研究专项（2013EG134237）；浙江“三农六方”科技协作计划项目（SN201206）

Effects of Nitrogen Application on Grain Yield and Nitrogen Utilization of No-tillage Machine Transplanted Rice

  • Online:2014-11-20 Published:2014-11-20

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摘要： 以中浙优1号为材料，研究了免耕机插条件下不同施氮量对水稻产量及氮素利用的影响。结果表明，免耕机插的施氮量与产量呈单峰曲线，施氮量增加产量呈先增后减趋势，有效穗数增加但成穗率降低；种植密度降低需增加施氮量才能获得高产；增施氮素能促进叶片变长和提高叶绿素含量，氮肥农学利用率和氮肥偏生产力随施氮量增加而降低，适宜施氮有利于氮素的吸收积累。杂交稻免耕机插合理种植密度在21.0丛/m2左右，合理的氮肥用量在180 kg/hm2左右。

关键词: 水稻, 免耕, 机插, 氮素利用, 产量

Abstract: The effects of different nitrogen application on grain yield and nitrogen utilization of no-tillage machine transplanted rice Zhongzheyou 1 were studied. The results showed that it is a single peak curve relation between nitrogen rate and yield. The panicle number increased with nitrogen rate, but the effective panicle percentage decreased. The high yield could obtain through enhancing nitrogen input under low planting density condition. The leaf length and chlorophyll content increased when nitrogen input increased, nitrogen agronomic efficiency and the nitrogen partial productivity decreased with the nitrogen rate increased, the optimum planting density was 21 hills per m2, and the optimum nitrogen input was 180 kg/hm2.

Key words: rice；no-tillage；machine transplanting；utilization of nitrogen, yield

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