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Special Issue:
棉花合辑Cotton
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| Effects of chemical topping on cotton development, yield and quality in the Yellow River Valley of China |
| ZHU Ling-xiao1*, LIU Lian-tao1*, SUN Hong-chun1, ZHANG Yong-jiang1, ZHANG Ke1, BAI Zhi-ying1, LI An-chang1, DONG He-zhong2, LI Cun-dong1 |
1 College of Agronomy, Hebei Agricultural University/State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Crop Growth Regulation of Hebei Province, Baoding 071001, P.R.China
2 Cotton Research Center, Shandong Academy of Agricultural Sciences, Jinan 250100, P.R.China |
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摘要
打顶是棉花栽培广泛应用的农艺措施由于其无限生长的习性。在不同的打顶方法中，人工打顶似然费时费力，但在黄河流域应用较为普遍。本研究旨在研究不同打顶处理对棉花发育、产量和品质的影响。本研究为两年（2015-2016）大田实验，设置三种打顶方式：人工打顶（MT），化学打顶（CT）（缩节铵），不打顶（NT）处理。我们发现CT处理的株高、果枝数及上部果枝长度要显著低于NT处理。CT处理的叶绿素含量与NT处理相比无显著差异，在生育后期要高于MT处理。CT处理通过降低赤霉素和脱落酸含量来促进棉株发育，并且抑制了主茎的顶端发育。和MT处理相比，CT处理显著增加了营养器官的生物量。最重要的是，CT和MT处理间的产量和品质并无显著差异。上述结果表明，化学打顶是一种简便、有效的打顶方法，可在我国黄河流域代替人工打顶。
Abstract Topping is a cultivation method that is widely practiced due to the indeterminate growth character of cotton (Gossypium hirsutum L.). Among the different methods of accomplishing topping, manual topping is common in the Yellow River Valley of China, although it is time- and labor-intensive. The objective of this study was to characterize the responses of cotton to different topping treatments with respect to development, yield and quality. This study included field experiments from 2015 to 2016 with three different topping methods: manual topping (MT), chemical topping (CT) using mepiquat chloride, and a non-decapitation treatment (NT). We found that the plant height, the number of fruiting branches and the length of upper fruiting branches of cotton treated with CT were significantly lower than NT. The chlorophyll content of cotton treated with CT was not significantly different from NT, but was higher than that of MT in the later season. CT enhanced plant development with reduced endogenous gibberellic acid and abscisic acid contents, and the apical development of the main stem was inhibited. Compared with MT, CT significantly increased the biomass of the vegetative parts. Most importantly, there were no significant differences in the yield or fiber quality between MT and CT. These findings suggested that CT, a simplified and effective topping method, could be utilized as an alternative in the Yellow River Valley of China.
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Received: 09 April 2020
Accepted: 17 November 2020
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| Fund: This work was supported by the National Natural Science Foundation of China (31571610 and 31871569) and the Modern Technology System of the Agricultural Industry in Hebei, China (HBCT2018040201). |
| About author: ZHU Ling-xiao, E-mail: 574740516@qq.com; LIU Lian-tao, E-mail: liulitday@126.com; Correspondence LI Cun-dong, Tel: +86-312-7521316, E-mail: auhlcd@163.com
* These authors contributed equally to this study. |
Cite this article:
ZHU Ling-xiao, LIU Lian-tao, SUN Hong-chun, ZHANG Yong-jiang, ZHANG Ke, BAI Zhi-ying, LI An-chang, DONG He-zhong, LI Cun-dong .
2022.
Effects of chemical topping on cotton development, yield and quality in the Yellow River Valley of China. Journal of Integrative Agriculture, 21(1): 78-90.
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