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Temperature-Related Yield Constraints of Early-Rice in South China: A Cross-Location Analysis

文献类型： 外文期刊

作者： Huang, Min 1 ; Zhang, Ruichun 1 ; Jiang, Peng 1 ; Xie, Xiaobing 1 ; Zhou, Xuefeng 1 ; Cao, Fangbo 1 ; Zou, Yingbin 1 ;

作者机构： 1.Hunan Agr Univ, Southern Reg Collaborat Innovat Ctr Grain & Oil C, Changsha, Hunan, Peoples R China

2.Hengyang Inst Agr Sci, Henyang, Peoples R China

3.Sichuan Acad Agr Sci, Rice & Sorghum Res Inst, Deyang, Peoples R China

4.Minist Agr, Key Lab Southwest Rice Biol & Genet Breeding, Deyang, Peoples R China

期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）

ISSN： 1932-6203

年卷期： 2016 年 11 卷 7 期

页码：

收录情况： SCI

摘要： Warm temperature during post-heading is generally hypothesized to be the critical factor limiting grain yield of early-rice in South China. However, there is no direct evidence to confirm this hypothesis in the field. This study was conducted to determine the temperature-related yield constraints of early-rice in South China. Field experiments were carried out in Huaiji (a location in South China) and Changsha (a location in the Yangtze River basin) in 2011-2013. In each year, two rice cultivars were grown in early-rice growing season in Huaiji and in single-rice growing season in Changsha. Huaiji had higher average daily maximum temperature during post-heading than Changsha. The higher temperature during post-heading induced early plant senescence (slower crop growth rate and shorter grain filling duration), but grain weight did not reduce because it was compensated for by increased translocation of pre-heading biomass. The higher temperature during post-heading also did not cause a reduction in grain filling percentage. Huaiji had lower temperature during pre-heading than Changsha, which to some extent resulted in slower crop growth rate and consequently lower biomass production and smaller sink size in Huaiji than in Changsha. As a result, grain yield was about 30% lower in Huaiji than in Changsha. Our results indicate that grain yield of early-rice in South China is limited not by warm temperature during post-heading but partially by cool temperature during pre-heading, and suggest that enhancing sink size and meanwhile maintaining good translocation of pre-heading biomass may be an effective way to achieve high yield for early-rice in South China.

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