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A Relationship between the Yield Formation and Leaf Sheath and Stem of the Top Layer in Hybrid Rice
Author(s): 
Pages: 6-11
Year: Issue:  2
Journal: GUIZHOU AGRICULTURAL SCIENCES

Keyword:  杂交稻产量形成生长规律冠层叶、鞘、茎;
Abstract: 2000~2001年,采用裁剪冠层叶面积的方法研究控制杂交稻产量形成与冠层叶、鞘、茎,分析倒1、倒2、倒3叶的叶、鞘生长规律及剪叶后对有效库容、源库变化、茎鞘输出率和籽粒充实的影响.结果表明:水稻3个叶、鞘的生长符合y=c/1+ae-bx曲线规律.抽穗后裁剪冠层叶,总库容变化是受千粒重的影响.有效库容随剪叶面积的增加而迅速下降,空秕粒增加明显,源不能满足库.A6B6全部剪去上3个叶后,充实度为0.3375.水稻高效能叶占54.88%,低效能叶占45.12%.物质生产叶片是倒1>倒2>倒3;裁剪冠层叶面积各节间茎鞘物质输出率的变化是:倒3节Aj、Bj均为鞘>茎鞘>茎,倒2节Aj为鞘>茎鞘>茎,Bj为鞘>茎>茎鞘,倒1节Aj、Bj均为茎鞘>鞘>茎.剪叶面积与充实度、灌浆重呈y=a-bx变化.
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