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Yield and yield component analysis of early-season rice in southern China

文献类型： 外文期刊

作者： Yan, Yong 1 ; Mo, Hailing 1 ; Qin, Gang 1 ; Luo, Zhiyong 1 ; Zhang, Zongqiong 1 ; Chen, Caihong 1 ;

作者机构： 1.Guangxi Acad Agr Sci, Guangxi Crop Genet Improvement & Biotechnol Lab, Nanning 530007, Peoples R China

关键词： Early-season;grain yield;rice;yield components

期刊名称：RESEARCH ON CROPS （ 影响因子：0.103； ）

ISSN： 0972-3226

年卷期： 2013 年 14 卷 1 期

页码：

收录情况： SCI

摘要： This study aimed at identifing which yield component should be emphasized in early-season rice improvement in southern China. Field experiments were conducted in Quanzhou, Guilin, Rongan, Zhongshan and Hechi, Guangxi province, southern China in 2010 and 2011. Eleven varieties were grown in each experiment under high-yielding management. Grain yield and yield components were determined for each variety. Grain yield, sink size (spikelet number/m(2)), spikelet filling percentage and grain weight differed significantly both across varieties and locations. A significantly positive relationship was found between grain yield and sink size, but no significant relationship was observed with spikelet filling percentage or grain weight. Sink size was related more closely to spikelet number per panicle than panicle number per m(2), and spikelet number per panicle was correlated more strongly to spikelet number per cm panicle than panicle length. Our study suggests that early-season rice improvement in southern China will depend mainly on the ability to increase sink size, and increasing spikelet number per panicle by increasing spikelet number per unit panicle length is an effective approach to achieve larger sink size for early-season rice in southern China.

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