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中国农学通报

中国农学通报 ›› 2012, Vol. 28 ›› Issue (24): 86-92.

所属专题： 水稻

• 农学 农业基础科学 • 上一篇    下一篇

不同基本苗对湖南双季早稻产量形成的影响

曹志 邢文婷 廖丁恒 吴旭 吴辉 蒋霞 陈莉 敖和军   

  • 收稿日期:2012-02-14 修回日期:2012-05-22 出版日期:2012-08-25 发布日期:2012-08-25
  • 基金资助:

    湖南农业大学人才引进基金

Influence of Seedling Number on Yield and Its Formation in Early Season Rice of Hunan

  • Received:2012-02-14 Revised:2012-05-22 Online:2012-08-25 Published:2012-08-25

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摘要：

为了更进一步地了解基本苗与早稻产量的关系，通过采用不同分蘖能力的水稻品种或组合（2个常规品种和2个杂交组合），在大田条件下，研究不同栽插基本苗（2苗/穴，3苗/穴，4苗/穴）对湖南双季早稻产量及产量形成的影响，并对产量及其构成、干物质积累和茎蘖数进行考察。结果表明，随栽插基本苗的增加，早稻产量、有效穂数、总干物质重呈增加趋势，每穗粒数、结实率、收获指数则呈下降趋势，千粒重变化不大。出叶速度随栽插基本苗的增加而略有减慢。从茎蘖动态来看，在最高分蘖期（移栽后28天）以前，各个处理的分蘖速度基本相同，处理间的最高苗数表现出较大差异，但是基本苗较少的处理，后期的死亡分蘖数相对较少，至成熟期，各处理间的有效穂数差异较小。综合来看，在本试验条件下，早稻的每穴基本苗多，有利于产量形成，较易获得稳产高产。

关键词: 鉴定, 鉴定

Abstract:

In order to have a further understanding between the basic seedlings and early rice yield, a field experiment was carried out to compare the influence of seedling number on yield and yield formation in early season of Hunan Province. 3 treatments with different seedling were: 2, 3, 4 seedlings per hole. 2 conventional rice varieties and 2 hybrid varieties with different tillering ability were chose. The yield and its components, biomass production and tiller number were observed. The results showed that, as the increase of basic seedlings number, productive panicles and total dry matter weight also increased, thus rice yield increased, while the number of grain per panicle, setting rate and harvest index decreased. The leaves spread slowly at higher basic seedlings number. Tiller number got the max and preformed significant difference at 28 days after transplanting, and then decreased slightly for all varieties and treatments. The results indicted that more seedling number per hole was benefit to get higher yield.