Crops ›› 2021, Vol. 37 ›› Issue (2): 147-152.doi: 10.16035/j.issn.1001-7283.2021.02.021

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Effects of Different Row Spacings on Boll Characteristics and Fiber Quality of Machine Picked Cotton

Zhang Wen(), Liu Quanyi, Zeng Qingtao, Cai Xiaoli, Feng Yang, Lu Tao()   

  1. The 7th Division of Agricultural Science Institute, Xinjiang Production and Construction Corps, Kuitun 833200, Xinjiang, China
  • Received:2020-05-29 Revised:2021-02-24 Online:2021-04-15 Published:2021-04-16
  • Contact: Lu Tao E-mail:zhangwenshzu@163.com;380605364@qq.com

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Abstract:

In this study, two cotton varieties “Z1112” and “Zhongmian 641” in the 7th division of Xinjiang Production and Construction Corps were used as the experimental materials and three row spacing patterns, six row spacing of one film (10cm+66cm+10cm+66cm+10cm), four row spacing of one film (76cm+10cm+76cm), and three row spacing of one film (76cm+76cm), were set up to study the effects of different row spacing patterns on the boll forming characteristics and fiber quality of cotton. The results showed that under the same cotton variety, the numbers of pre-summer bolls with three row spacing of one film and four row spacing of one film were more than six row spacing of one film, while the number of pre-summer bolls and inner bolls with six row spacing of one film was more than four row spacing of one film and three row spacing of one film. The three row spacing patterns were lower bolls > middle bolls > upper bolls. The bolls of middle bolls and lower bolls showed that the number of bolls per unit area of six rows per membrane was significantly higher than that of three rows per membrane but there was no significant difference between them. Three row spacing of one film was more conducive to cotton defoliation and bolling than the other two row spacing patterns but the pattern of different row spacing had no significant effect on cotton yield, fiber length, evenness index, micronaire value, and elongation and had some effects on specific breaking strength and short fiber index. Compared with the other two models, the three row spacing of one film pattern had the sufficient row spacing configuration which could give full play to the production potential of individuals and groups, significantly improve the boll number and boll weight per plant, and have a better defoliating effect and cotton fiber quality. Therefore, the three row spacing of one film configuration mode is suitable for popularization in this area.

Key words: Cotton, Row spacing configuration, Boll characteristics, Fiber quality

Table 1

Treatments of different row-spacing combinations"

处理
Treatment		 棉花品种
Cotton variety		 配置模式
Configuration		 行距
Row space (cm)		 株距
Plant distance(cm)		 理论密度(株/hm2)
Theoretical density (plant/hm2)
T1 Z1112 一膜六行 10+66+10+66+10 9.5 279 000
T2 一膜四行 76+10+76 8.2 216 000
T3 一膜三行 76+76 8.2 162 000
T4 中棉641 一膜六行 10+66+10+66+10 9.5 279 000
T5 一膜四行 76+10+76 8.2 216 000
T6 一膜三行 76+76 8.2 162 000

Fig.1

Effects of different treatments on time distribution of cotton bolls Different lowercase letters indicate significant difference between treatments (P < 0.05). The same below"

Fig.2

Effects of different treatments on spatial distribution of cotton bolls (longitudinal)"

Fig.3

Effects of different treatments on spatial distribution of cotton bolls (transverse)"

Table 2

Effects of different treatments on cotton defoliation rate and bolling rate %"

处理
Treatment		 脱叶率Defoliation percentage 吐絮率Bolling rate
施药后11d
11 days after spraying		 施药后22d
22 days after spraying		 施药前
Before spraying		 施药后11d
11 days after spraying		 施药后22d
22 days after spraying
T1 36.7c 89.1b 13.4a 41.4b 89.8ab
T2 47.2b 93.5ab 14.1a 43.5ab 90.4ab
T3 49.5b 94.7ab 12.4a 44.4a 93.3a
T4 50.7ab 89.3b 1.9b 21.4e 83.0c
T5 52.2ab 94.0ab 3.2b 27.3d 84.8bc
T6 56.2a 96.6a 1.0b 35.3c 90.7ab

Table 3

Effect of different treatments on cotton yield and component factors"

处理
Treatment		 单株铃数
Number of bolls per plant		 株数(株/hm2)
Plant numbers per hectare		 总铃数(×104/hm2)
Total boll numbers		 单铃重
Boll mass (g)		 衣分
Lint percentage (%)		 子棉产量
Seed cotton yield (kg/hm2)
T1 5.7c 228 310a 130.2a 6.3b 44.3a 5232a
T2 8.6b 169 589b 145.8a 6.1bc 44.3a 5318a
T3 10.7a 126 954c 135.8a 6.8a 44.1a 5294a
T4 6.4c 227 966a 145.9a 5.7d 42.7b 4332b
T5 7.8b 167 416b 130.6a 5.8cd 43.2ab 4289b
T6 11.3a 124 887c 141.5a 6.4ab 42.8b 4449b

Table 4

Effects of different treatments on cotton fiber quality"

处理
Treatment		 绒长
Fiber length (mm)		 整齐度指数
Uniformity index (%)		 马克隆值
Micronaire value		 断裂比强度
Specific strength (cN/tex)		 伸长率
Elongation (%)		 短纤维指数
Short fiber index (%)
T1 31.2b 87.0ab 4.0a 33.9b 7.0a 6.7a
T2 31.6b 87.3a 4.1a 35.2a 7.1a 6.7a
T3 31.3b 86.3abc 4.2a 35.8a 6.9a 6.6ab
T4 33.9a 85.4c 4.5a 34.9ab 6.9a 6.3bc
T5 33.1a 85.1c 4.6a 36.1a 6.9a 6.0d
T6 33.9a 85.9bc 4.6a 35.6a 7.0a 6.0d
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