不同密度下三种打顶方式对棉花株型结构及产量的影响

doi:10.6048/j.issn.1001-4330.2018.11.002

新疆农业科学 ›› 2018, Vol. 55 ›› Issue (11): 1968-1976.DOI: 10.6048/j.issn.1001-4330.2018.11.002

• 作物遗传育种·种质资源·分子生物学 • 上一篇下一篇

不同密度下三种打顶方式对棉花株型结构及产量的影响

崔延楠, 韩文婷, 聂志勇, 赵强

新疆农业大学农学院,乌鲁木齐 830052

收稿日期:2018-09-30 发布日期:2019-02-22
通信作者: 赵强(1981-),男,安徽灵璧人,副教授,博士,研究方向为作物化学控制,E-mail:qiangzhao99@163.com
作者简介:崔延楠(1994-),男,哈密人,硕士研究生,研究方向为作物化学控制,E-mail:120986574@qq.com
基金资助:
国家自然科学基金项目(3156100654)

Effects of Three Topping Methods on Cotton Plant Type Structure and Yield at Different Densities

CUI Yan-nan, HAN Wen-ting, NIE Zhi-yong, ZHAO Qiang

College of Agronomy, Xinjiang Agricultural University Urumqi 830052, China

Received:2018-09-30 Published:2019-02-22
Correspondence author: ZHAO Qiang(1981-）,male, Lingbi, Anhui Province, Associate Professor, Ph. D., research direction is crop chemical control principle and technology. E-mail:qiangzhao99@163.com
Supported by:
The National Natural Science Foundation of China (31560409)

摘要/Abstract

摘要： 【目的】研究不同密度下打顶方式对棉花株型结构及产量的影响。【方法】采用裂区设计,主区密度设置为9×10⁴、18×10⁴、27×10⁴株/hm²三个水平,副区设置人工打顶、化学封顶和不打顶三种方式。【结果】随着密度的增大,化学封顶棉花比不打顶棉花的株高、茎粗、果枝长及节间长均降低,茎粗为不打顶>人工打顶>化学封顶,株高及果枝长表现为化学封顶大于人工打顶,小于不打顶;密度在27×10⁴株/hm²时,化学封顶可以延缓LAI下降速度,化学封顶产量最高为7 423.80 kg/hm²;化学封顶在不同密度条件下,马克隆值均优于其他打顶方式。【结论】不同密度下,化学封顶均能有效抑制棉花生长点伸长,塑造利于机械采收的紧凑株型,化学封顶棉花更适于高密度种植。

关键词: 棉花; 密度; 化学封顶; 人工打顶; 干物质积累

Abstract: 【Objective】 To study the effects of different types of detopping on cotton plant type structure and yield at different densities.【Method】The split zone design was used in the experiment, the density of the main area was set at three levels of 90,000 plants/hm², 180,000 plants/hm², and 270,000 plants/hm², and three levels were set at sub area: Artificial topping, chemical top capping, and no topping.【Result】With the increase of density, the plant height, stem diameter, fruit branch length and internode length of chemically detopping cotton were lower than those of undetoping cotton. The stem thickness was undetopping > artificial detopping > chemical detopping. The plant height and fruit branch length showed that the chemical detopping was greater than the artificial detopping, and was less than that of no detopping. When the density was 270,000/hm², the chemical detopping could delay the decline of the LAI, and the highest yield was 7,423.80 kg/hm². Chemical detopping cotton's MIC was superior to other topping methods at different densities.【Conclusion】Chemical detopping at different densities can effectively inhibit cotton growth point elongation, thus shaping a compact plant type that is beneficial to mechanical harvesting, and chemically detopping cotton is more suitable for high density planting.

Key words: cotton; density; chemical detopping; artificial detopping; dry matter accumulation

中图分类号:

S562

崔延楠, 韩文婷, 聂志勇, 赵强. 不同密度下三种打顶方式对棉花株型结构及产量的影响[J]. 新疆农业科学, 2018, 55(11): 1968-1976.

CUI Yan-nan, HAN Wen-ting, NIE Zhi-yong, ZHAO Qiang. Effects of Three Topping Methods on Cotton Plant Type Structure and Yield at Different Densities[J]. Xinjiang Agricultural Sciences, 2018, 55(11): 1968-1976.

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不同密度下三种打顶方式对棉花株型结构及产量的影响

Effects of Three Topping Methods on Cotton Plant Type Structure and Yield at Different Densities

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