Effects of chemical capping agent on direct cotton after rape

doi:10.14088/j.cnki.issn0439-8114.2021.08.007

Abstract

Abstract: The effects of chemical capping agent on the growth and development of early-maturing cotton after rape direct seeding was studied under the machine-picking mode, the results provided a basis for the maturation, demonstration and promotion of this technique in the cotton planting area of Poyang lake in the Yangtze river basin. In 2017—2018, the Zhongmiansuo 50 and Zhongmiansuo 425 were used as test materials to perform live broadcast after rape harvesting in machine mode, with 8 treatments （spraying time were T1 and T2; spraying doses were D1, D2 and D3, respectively, and no topping and artificial topping as controls, respectively, CK1 and CK2） to study its agronomic characteristics and yield of cotton effects on properties and quality.After spraying the chemical capping agent, the growth of cotton plants in the vertical and horizontal directions was suppressed at the same time, forming a compact plant type. Compared with artificial topping, using chemical agents to cap, as long as you master the spray application time and dosage will not reduce cotton yield and have no obvious impact on cotton fiber quality.According to the results of 2 years, under the climate and production conditions in the cotton planting area of Poyang lake, chemical agents were used to cap the top of direct seeding cotton after early maturingrape, and the concentration of the capping agent was 1 125~1 500 mL/hm², the application time should be about 5 days later than artificial topping.

Key words: chemical capping, direct seeding cotton after rape, Poyang lake cotton-growing area, yield, quality, agronomic traits

CLC Number:

S562

ZHANG Li-juan, CHEN Jun-ying, QIN Yu-kun, WANG Yu-ping, CHENG Hui-huang, XIA Shao-nan. Effects of chemical capping agent on direct cotton after rape[J]. HUBEI AGRICULTURAL SCIENCES, 2021, 60(8): 36-40.

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