中国水稻科学

中国水稻科学

• 研究报告 • 上一篇    下一篇

阴雨对早稻开花及受精结实的影响

张玉烛; 张桂和; 朱国奇; 邓启云; 詹庆才   

  1. 湖南省农业科学院水稻研究所
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1995-07-10 发布日期:1995-07-10

Effects of Overcast and Raining on Flowering, Fertilizing and Seed Setting of Early Rice

Zhang Yuzhu; Zhang Guihe; Zhu Guoqi; Deng Qiyun; Zhan Qingcai   

  • Received:1900-01-01 Revised:1900-01-01 Online:1995-07-10 Published:1995-07-10

PDF

被引次数

30

摘要： 利用人工模拟阴雨条件在抽穗扬花期对491个早稻品种进行了试验，并在自然阴雨条件下观察了39个品种的表现。在阴雨条件下，水稻开花率、受精率和结实率均明显降低。降雨主要造成开花率和受精率的大幅度下降，遮荫则使退化颖花和批粒增加。相同处理的不同品种之间差异很大，其中以闭花受精品种类型对阴雨适应性最强。并将水稻品种对阴雨的适应性分为5种类型。

关键词: 品种适应性, 阴雨, 结实, 开花

Abstract: The performance of flowering, fertilizing and seed-setting of 491 varieties of early rice was evaluated under the artificial simulation condition of overcast and raining, and so did adaptability of 39 varieties in the condition of natural overcast and raining during heading and flowering stages. The results indicate that rates of flowering, fertilizing and seed-setting reduced obviously in the condition of overcast and raining. Raining makes mainly flowering rate and fertilizing rate drop in a great extent, shading causes degradation of glume and increase of unfilled grains. The difference is significant among the tested varieties under the same conditions. The cleistogamic type rice varieties are better adaptable to overcast sky and raining.

Key words: adaptability of variety, flowering, overcast sky and raining, seed-setting