Effect of defoliation and ripening time on cotton yield and quality

doi:10.16178/j.issn.0528-9017.20240096

Abstract

Abstract:

In this study, the effects of different defoliation and ripening time on cotton yield and quality were studied using hybrid cotton variety Ruiza 818 as the material. The results showed that defoliation and ripening had a great effect on the single boll weight of cotton, and defoliation and ripening affected the later growth and development of the upper boll. The yield of pre-frost seed cotton in the plot after defoliation and ripening was significantly higher than that of the control, and the yield of seed cotton after frost was significantly lower than that of the control, and the total yield was slightly higher than that of the control. Early defoliation and ripening reduced the lint percentage, fiber length, breaking strength and micronaire value of cotton. However, with the delay of defoliation and ripening time, the lint percentage, fiber length, breaking strength and micronaire value of cotton were not significantly different from those of the control.

Key words: defoliation ripening, boll weight, yield, quality, cotton

CLC Number:

S562

ZHAO Zhongting, FAN Haichao, ZHANG Zhiheng, ZHANG Guihua. Effect of defoliation and ripening time on cotton yield and quality[J]. Journal of Zhejiang Agricultural Sciences, 2025, 66(3): 600-603.

Figures/Tables 9

References 9

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时间	平均气温/℃	平均降水量/mm	日照时长/h
9月上旬	24.9	0	80.5
9月中旬	24.0	0	76.5
9月下旬	21.1	0	83.2
10月上旬	14.9	23.2	31.3
10月中旬	14.6	0	66.9
10月下旬	15.3	0	70.0

时间	平均气温/℃	平均降水量/mm	日照时长/h
9月上旬	24.9	0	80.5
9月中旬	24.0	0	76.5
9月下旬	21.1	0	83.2
10月上旬	14.9	23.2	31.3
10月中旬	14.6	0	66.9
10月下旬	15.3	0	70.0

处理	单铃重/g
处理	9月23日采收	10月26日采收	11月5日采收	平均
CK	6.91	6.88	6.83	6.87
T1	6.91	6.25	6.02	6.39
T2	6.91	6.71	6.35	6.66
T3	6.91	6.76	6.65	6.77

处理	单铃重/g
处理	9月23日采收	10月26日采收	11月5日采收	平均
CK	6.91	6.88	6.83	6.87
T1	6.91	6.25	6.02	6.39
T2	6.91	6.71	6.35	6.66
T3	6.91	6.76	6.65	6.77

处理	小区霜前籽棉产量/kg	小区霜后籽棉产量/kg	小区籽棉产量/kg	667 m² 籽棉产量/kg
CK	10.70	1.07	11.77	295.62
T1	12.53	0.25	12.78	319.88
T2	12.48	0.69	13.17	329.38
T3	11.79	0.73	12.52	313.13