湖北农业科学 ›› 2021, Vol. 60 ›› Issue (5): 25-28.doi: 10.14088/j.cnki.issn0439-8114.2021.05.005

• 育种·栽培 • 上一篇    下一篇

不同氮肥水平对珍珠糯分蘖动态和产量形成的影响

胡杨, 段斌, 何世界, 方玲, 王青林, 李慧龙, 宋晓华, 陈龙   

  1. 信阳市农业科学院,河南 信阳 464000
  • 收稿日期:2020-05-08 出版日期:2021-03-10 发布日期:2021-03-22
  • 通讯作者: 段斌(1970-),男,河南罗山人,副研究员,硕士,主要从事水稻栽培研究,(电子信箱)duanb@163.com。
  • 作者简介:胡杨(1990-),男,河南新县人,助理研究员,硕士,主要从事水稻栽培研究,(电话)13183369098(电子信箱)huyang0373@163.com;
  • 基金资助:
    河南省重大科技专项(171100110300-1); 国家水稻产业技术体系建设专项(CARS-01-76); 河南省科技攻关项目(172102110156; 182102110372)

Effects of different nitrogen fertilizer levels on tillering dynamics and yield formation of Zhenzhunuo

HU Yang, DUAN Bin, HE Shi-jie, FANG Ling, WANG Qing-lin, LI Hui-long, SONG Xiao-hua, CHEN Long   

  1. Xinyang Academy of Agricultural Sciences, Xinyang 464000, Henan, China
  • Received:2020-05-08 Online:2021-03-10 Published:2021-03-22

摘要: 通过研究不同氮肥水平下珍珠糯的分蘖动态及产量构成的变化,探索氮肥对珍珠糯分蘖成穗及产量和产量构成因素的影响,确定不同施氮水平下的经济效益,优化施肥模式,为该品种在生产上高效应用提供参考。结果表明,珍珠糯的分蘖数量随着氮肥水平的提高而增加;不同处理分蘖成穗率的范围为60.73%~78.54%;氮肥用量过多或过少都会导致始穗期和齐穗期延迟,成熟期在纯氮用量为202.5 kg/hm2时最晚;各处理的产量构成因素中,有效穗数随着氮肥用量的增加而增加,结实率随着氮肥用量的增加而降低,千粒重随着氮肥用量的增加呈先增加后降低的趋势,在纯氮用量为157.5 kg/hm2 时千粒重最高。产量随着氮肥用量的增加呈先增加后减少的趋势,纯氮用量在157.5 kg/hm2时产量最高;氮肥农学效率随着氮肥用量的增加先增加,在纯氮用量为180.0 kg/hm2时达到最高,之后呈下降趋势;根据拟合方程,当纯氮用量在96.88 kg/hm2时经济效益达到最大值。综上分析,该品种在磷、钾肥适当的条件下,氮肥(纯氮)用量在157.5 kg/hm2时,产量结构较为合理,产量最高,群体质量也较高,综合效益较好。

关键词: 珍珠糯, 分蘖动态, 产量结构, 氮肥

Abstract: By studying of the tillering dynamics and yield composition changes of Zhenzhunuo under different nitrogen fertilizer levels, the effects of nitrogen fertilizer on tiller panicle formation, yield and yield composition factors of Zhenzhunuo were explored,and the economic benefits under different nitrogen levels was determined, to optimizethe fertilization mode, and provide references for the efficient application of this variety in production. The results showed that the tillering number of Zhenzhunuo increased with the increase of nitrogen fertilizer level. The range of tiller panicles was 60.73% to 78.54% under different treatments. Too much or too little nitrogen fertilizer will lead to the delay of start heading stage and full panicle stage, and the mature stage was the latest at the level of 202.5 kg/hm2 nitrogen. Among the yield components of each treatment, the effective panicle increased with the increase of nitrogen fertilizer, the seed setting rate decreased with the increase of nitrogen fertilizer, and the 1000-grain weight increased first and then decreased with the increase of nitrogen fertilizer. The 1000-grain weight was the highest at the level of 157.5 kg/hm2 nitrogen. The yield increased first and then decreased with the increase of nitrogen fertilizer, and the yield was the highest at the nitrogen applicaiton level of 157.5 kg/hm2. The agronomic efficiency of nitrogen fertilizer first increased with the increase of nitrogen fertilizer, and then began to decline after the nitrogen application level of 180.0 kg/hm2. According to the fitting equation, the economic benefit reached the maximum when nitrogen was used at 96.88 kg/hm2. In conclusion, under the appropriate conditions of P and K fertilizer, the yield structure of this variety is more reasonable, the yield is the highest, the group quality is higher, and the comprehensive benefit is better when the nitrogen fertilizer(N) use is 157.5 kg/hm2.

Key words: Zhenzhunuo, tillering dynamics, yield structure, nitrogen fertilizer

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