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Architecture of stem and branch affects yield formation in short season cotton

Journal of Integrative Agriculture 2020年第3期19卷 680-689页

作者： ZHANG Xiang RUI Qiu-zhi LI Yuan CHEN Yuan CHEN Yuan ZHANG Xi-ling CHEN De-hua SONG Mei-zhen Institute of Cotton Research Chinese Academy of Agricultural Sciences/State Key Laboratory of Cotton BiologyAnyang 455000P.R.China Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops Yangzhou UniversityYangzhou 225009P.R.China

The cotton direct seeding after wheat(rape) harvested is under trial and would be the future direction at the Yangtze River Valley region of *** 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 *** 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 *** 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 *** 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 *** 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 *** MC application could promote the appropriate plant height and NBR and high CFB and thus resulted in high boll retention speed and 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 yie

关键词： short season cotton architecture of the stem and branch boll retention speed seed cotton yield mepiquat chloride

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