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Delayed transplanting reduced grain yield due to low temperature stress at anthesis in machine-transplanted late-season rice

Published online by Cambridge University Press:  31 January 2019

Min Huang Open the ORCID record for Min Huang [Opens in a new window] ,
Shengliang Fang ,
Shuanglü Shan  and
Yingbin Zou
Min Huang*
Affiliation:
Southern Regional Collaborative Innovation Center for Grain and Oil Crops (CICGO), Hunan Agricultural University, No. 1 Nongda Road, Furong District, Changsha 410128, China
Shengliang Fang
Affiliation:
Southern Regional Collaborative Innovation Center for Grain and Oil Crops (CICGO), Hunan Agricultural University, No. 1 Nongda Road, Furong District, Changsha 410128, China
Shuanglü Shan
Affiliation:
Southern Regional Collaborative Innovation Center for Grain and Oil Crops (CICGO), Hunan Agricultural University, No. 1 Nongda Road, Furong District, Changsha 410128, China
Yingbin Zou
Affiliation:
Southern Regional Collaborative Innovation Center for Grain and Oil Crops (CICGO), Hunan Agricultural University, No. 1 Nongda Road, Furong District, Changsha 410128, China
*
*Email: mhuang@hunau.edu.cn
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Abstract

The development of mechanised large-scale farming has led to changes in rice production systems. Increases in time of farming operations often occur under large-scale farming conditions, which can lead to delayed transplanting (DTP). In this study, field experiments were conducted in the late rice-growing season in 2016 and 2017 to compare the growth stages, growing-season temperature and yield attributes between normal transplanting with 15- to 20-day-old seedlings and DTP with 30-day-old seedlings of two rice cultivars. DTP resulted in 6- and 12-day delays in heading stage for both cultivars in 2016 and 2017, respectively. As a consequence, low temperature stress occurred at anthesis under DTP in both years, which led to significantly reduced spikelet filling and grain yield under DTP for both cultivars. These results confirm that DTP can reduce spikelet filling and grain yield due to low temperature stress at anthesis in machine-transplanted late-season rice. This finding highlights that greater efforts should be made to develop high-yielding short-duration rice cultivars to meet the development of mechanised large-scale rice farming.

Keywords

Delayed transplantingLow temperature stressRice
Type
Research Article
Information
Experimental Agriculture , Volume 55 , Issue 6 , December 2019 , pp. 843 - 848
Copyright
© Cambridge University Press 2019 

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