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Special Issue:
棉花合辑Cotton
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| Architecture of stem and branch affects yield formation in short season cotton |
ZHANG Xiang2*, RUI Qiu-zhi2, LI Yuan2, CHEN Yuan2, CHEN Yuan2, ZHANG Xi-ling1, CHEN De-hua2, SONG Mei-zhen1* |
1 Institute of Cotton Research, Chinese Academy of Agricultural Sciences/State Key Laboratory of Cotton Biology, Anyang 455000, P.R.China
2 Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, P.R.China |
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Abstract The cotton direct seeding after wheat (rape) harvested is under trial and would be the future direction at the Yangtze River Valley region of China. The objective of this study was to quantify the effects of branch and stem architecture on cotton yield and identify the optimal cotton architecture to compensate the yield loss due to the reduction of individual production capacity under high planting density in the direst seeding after wheat harvested cropping system. The characteristics of the stem and branch architecture and the relationships between architecture of the stem and branch with yield formation were studied on eight short season cotton cultivars during 2015 and 2016 cotton growth seasons. Based on the two years results, three cultivars with different architectures of stem and branch were selected to investigate the effect of mepiquat chloride (MC) application on the architecture of the stem and branch, boll retention, and the yield in 2017. Significant differences were observed on plant height, all fruiting nodes to branches ratio (NBR) in the cotton plant, and the curvature of the fruiting branch (CFB) among the studied cultivars. There were three types of stem and fruiting branch structures: Zhong425 with stable and suitable plant height and NBR (about 90 cm and 2.5, respectively), high CFB (more than 10.0), and high boll retention speed and seed cotton yield; Siyang 822 with excessive plant height and NBR, low CFB, and low boll retention speed and seed cotton yield; and other studied cultivars with unstable structure of stem and branch, boll retention speed, and seed cotton yield across years. And MC application could promote the appropriate plant height and NBR and high CFB and thus resulted in high boll retention speed and the yield. The results suggested that the suitable plant height and NBR (about 90 cm and 2.5 respectively), and high CFB (more than 10.0), which was related to both genotype and cultural practice, could promote the higher boll retention speed and seed cotton yield.
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Received: 21 September 2018
Accepted:
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| Fund: The study are funded by the National Key Research and Development Program of China (2018YFD0100400 and 2017YFD0201300), the Engineering Science and Technology Innovation Fund of Chinese Academy of Agricultural Sciences (2016PCTS-1), the National Natural Science Foundation of China (31671613), and the Priority Academic Program Development of Jiangsu Higher Education Institutions, China (PAPD). |
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Corresponding Authors:
Correspondence ZHANG Xi-ling, Tel: +86-372-2562308, Fax: +86-372-2562256, E-mail: hainan1571@163.com; CHEN De-hua, Tel: +86-514-7979357, Fax: +86-514-7996817, E-mail: cdh@yzu.edu.cn
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| About author: * These authors contributed equally to this study |
Cite this article:
ZHANG Xiang, RUI Qiu-zhi, LI Yuan, CHEN Yuan, CHEN Yuan, ZHANG Xi-ling, CHEN De-hua, SONG Mei-zhen .
2020.
Architecture of stem and branch affects yield formation in short season cotton. Journal of Integrative Agriculture, 19(3): 680-689.
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