中国稻米

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施氮量对机穴播水稻产量及其构成因素的影响

  1. 上海市松江区农业技术推广中心,上海 201611
  • 出版日期:2018-05-20 发布日期:2018-05-20

Effects of Nitrogen Application Rate on Yield and Yield Components of Mechanical-dibbling Rice

  • Online:2018-05-20 Published:2018-05-20

摘要:

以单季晚稻秀水114为试验材料,研究了施氮量对机穴播稻产量及其构成因素的影响。结果表明,施氮量与机穴播稻产量呈极显著一元二次抛物线关系,秀水114作机穴播稻适宜施氮量为300 kg/hm2。随着施氮量的增加,秀水114有效穗数、高峰苗数增多,每穗实粒数、结实率、千粒重和茎蘖成穗率降低,拔节期和抽穗期干物质积累量增加,成熟期干物质积累量与产量变化趋势一致,各关键生育时期的LAI增加,粒叶比则降低,株高和基部伸长节间伸长。

关键词: 施氮量, 机穴播, 产量, 产量构成因素

Abstract:

The effects of nitrogen application rate on yield and yield components of mechanical-dibbling rice were studied, with the late season rice Xiushui 114 as material. The results showed that, nitrogen application rate and the yield of machine-dibbling rice had one-place quadratic parabola relationship, which was significantly related, the proper amounts of nitrogen application rate on machine-dibbling rice was 300 kg/hm2. With the increase of nitrogen application rate, the effective panicles and the highest number of seedlings were increased; filled grains per panicle, seed setting rate, 1 000-grain weight and percentage of earbearing tiller were reduced; the dry matter accumulation in jointing stage and heading stage were increased; plant height and basal internode length were extended.

Key words: nitrogen application rate, mechanical-dibbling, yield, yield components

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