Crops ›› 2023, Vol. 39 ›› Issue (1): 158-162.doi: 10.16035/j.issn.1001-7283.2023.01.023

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Effects of Different Doses of AFD on Growth and Yield of Cotton

Li Wenshan(), Zhang Junyao, Tang Jianghua, Xu Wenxiu(), Xu Qinghua   

  1. College of Agricultural, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China
  • Received:2021-11-03 Revised:2021-11-23 Online:2023-02-15 Published:2023-02-22

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Abstract:

Through exploring the suitable drop amount of the new plant growth regulator AFD in cotton production, the basis for light and simplified cultivation of cotton was provided. The field experiment was conducted from April to October in 2020, with five treatments of 0 (CK), 750 (A), 1050 (B), 1350 (C), 1650g/ha (D). The effects of different dosage of AFD on agronomic characteristics, dry matter weight, yield and fiber quality of cotton were analyzed. The results showed that the plant height and stem diameter of cotton were not significantly affected by different dosage of AFD, but the growth of leaf and fruit branch length were promoted. The number of fruit branches, effective boll number, dry weight per plant and organ (stem, leaf and boll) of cotton showed an increasing trend with the increase of AFD application amount, and the following changes were observed D > C > B > A > CK treatment. Compared with CK treatment, boll number per plant and boll weight per plant were significantly increased, and seed cotton yield was increased. D treatment had the highest yield, was 5269.70kg/ha, which was 12.45%, 11.57%, 7.68% and 1.82% higher than CK, A, B and C treatments, respectively. The treatment level of AFD had positive correlation with the uniformity of cotton plant, breaking strength and fiber length, and the D treatment was the highest, but it inhibited the short fiber percentage and Micronaire value. In conclusion, 1650g/ha was the best application rate of AFD in cotton cultivation.

Key words: Drip-application, AFD, Cotton, Dry matter accumulation, Yield

Table 1

Agronomic characteristics of cotton with different drops"

处理
Treatment		 株高Plant height (cm) 茎粗Stem diameter (mm) 叶枝长
Leaf branch
length (cm)		 果枝长
Fruit branch
length (cm)		 果枝数
Number of
branches
打顶前
Before multi-topping		 打顶后
After multi-topping		 打顶前
Before multi-topping		 打顶后
After multi-topping
CK 78.17a 78.50a 1.09a 1.13a 33.27c 29.50b 6.67b
A 76.80a 78.44a 1.11a 1.15a 33.90c 30.27b 7.33ab
B 76.88a 77.33a 1.11a 1.17a 33.50c 30.83b 8.00ab
C 79.57a 79.30a 1.12a 1.17a 36.90b 31.03b 8.33a
D 76.60a 77.78a 1.15a 1.18a 40.33a 33.37a 8.67a

Fig.1

Changes of number of bolls under different treatments"

Table 2

Dry matter weight of each organ and individual plant of cotton under different treatments g"

处理
Treatment		 铃
Boll		 茎
Stem		 叶
Leaf		 单株总重
Total weight per plant
CK 61.86e 21.91d 14.49c 98.26e
A 71.57d 24.57cd 17.67d 113.81d
B 76.76c 27.37bc 23.22b 127.34c
C 88.27b 28.27ab 21.23c 137.77b
D 98.26a 31.18a 26.70a 156.14a

Table 3

Cotton yield and its components under different treatments"

处理
Treatment		 株数（万株/hm2）
Plant numbers (×104/hm2)		 籽棉产量
Seed cotton yield (kg/hm2)		 单株铃数
Number of bolls per plant		 单铃重
Weight per boll (g)
CK 14.62a 4686.20c 8.50c 4.19b
A 14.21a 4723.05b 8.33c 4.34b
B 14.90a 4894.00b 9.25bc 4.75a
C 14.98a 5175.60a 9.83b 4.88a
D 14.46a 5269.70a 10.83a 4.96a

Table 4

Cotton quality under different treatments"

处理
Treatment		 整齐度指数
Uniformity index (%)		 断裂比强度
Specific strength (CN/tex)		 短纤维指数
Short fiber index (%)		 马克隆值
Micronaire value		 纤维长度
Fiber length (mm)
CK 83.01b 28.93b 8.07a 4.97a 28.94b
A 84.30b 29.27b 5.93cd 4.63ab 29.20b
B 83.47b 29.20b 6.70bc 4.60ab 30.06ab
C 84.40b 29.47ab 7.30ab 4.63ab 29.80ab
D 85.77a 30.47a 5.10d 4.50b 31.01a
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