Defoliant on Cotton Defoliation Effect and Its Influence on the Yield of Different Position Fruit Branches

doi:10.6048/j.issn.1001-4330.2022.10.006

Abstract

Abstract:

【Objective】 This research aims to study the effect of defoliantion spraying time on cotton defoliation and the yield of fruit branches at different positions in the hope of screening out the appropriate defoliant spraying time and providing a theoretical basis for increasing yield and quality.【Method】 The five main varieties of northern Xinjiang were taken as materials, three spraying treatments were set up during the boll-out period, with boll-out rate of 10%-20% (T₁), boll-out rate of 30%-50% (T₂), and boll-out rate of 70%-80% (T₃), with spraying clean water as the control (CK) to explore the effect of defoliant treatment on cotton defoliation rate, boll spit rate, yield and yield components.【Results】 The results showed that Miaobao 21 and Xinluzao 37 had the best defoliation effect at T₃; Nongda 1, Guoxin 73 and C₁ had the best defoliation effect at T₂.Defoliant treatment had little effect on the boll-out rate of Miaobao 21 and Nongda 1, and the boll-out rate was about 85%.It had a greater impact on the boll release rate of Guoxin 73 and C₁, and Miaobao 21 T₂ was significantly higher than those of T₁.Nongda 1, Guoxin No.73 and Xinluzao 37 T₁ boil-off rate was higher than those of other treatments.Nongda 1, Guoxin 73 and Xinluzao 37 T₁ boil-off rate was higher than those of other treatments.The highest T₃ spitting rate was observed between the C₁ treatments.With the spraying time of the defoliant, the natural flocculation increased (T₃>T₂>T₁), and the increase of the flocculation of each variety and treatment gradually decreased (T₁>T₂>T₃).During the T₂ period of Miaobao 21 and Nongda 1, the yield of seed cotton and lint increased significantly, but the lint score was relatively low, and the CK lint score was the highest.C₁ clothing score was significantly higher than that of T₁ during T₂. Different varieties, treatments and positions of fruit branches had interactive effects on yield, lint percentage and boll weight.【Conclusion】 The study has found that Miaobao 21, Nongda 1, Guoxin 73, and C₁ have better defoliation effects at T₂, better flocculation rate, relatively higher seed cotton yield and lint yield, and lower lint; the defoliation of Xinluzao 37 at T₃ is the best, the flocculation rate is higher, the yield is the highest, and the lint and boll weight are the highest.

Key words: defoliant; defoliation rate; single bell weight; yield; clothing points; interaction effect

摘要：

【目的】研究脱叶剂喷施时间对棉花脱叶效果及不同部位果枝产量的影响,筛选出适宜的脱叶剂喷施时间,为增产保质提供理论依据。【方法】以新疆北疆5个棉花主栽品种为材料,于吐絮期设置3个喷施处理,分别为吐絮率为10%~20%(T₁)、吐絮率为30%~50%(T₂)、吐絮率为70%~80%(T₃),喷施清水为对照(CK),分析脱叶剂处理后,对棉花脱叶率、吐絮率、产量及产量构成因素的影响。【结果】苗宝21号和新陆早37号在T₃的脱叶效果最佳;农大1号、国新73号、C₁在T₂脱叶效果最佳;脱叶剂处理对苗宝21号和农大1号的吐絮率影响不大,吐絮率约85%;对国新73号、C₁的吐絮率影响较大,苗宝21号T₂显著高于T₁;农大1号、国新73号、新陆早37号T₁吐絮率高于其他处理;C₁各处理间T₃吐絮率最高。随着脱叶剂喷施时间,自然吐絮增加(T₃>T₂>T₁),各品种各处理吐絮增量逐渐降低(T₁>T₂>T₃);苗宝21号、农大1号T₂时期,籽棉产量和皮棉显著增产,但衣分相对较低,CK衣分最高。C₁衣分在T₂时期显著高于T₁。不同品种、处理、果枝位置对产量和衣分及铃重的影响,具有交互效应。【结论】苗宝21号、农大1号、国新73号、C₁在T₂脱叶效果较优,吐絮率较好,籽棉产量和皮棉产量相对较高,衣分较低;新陆早37号在T₃脱叶最佳,吐絮率较高,产量最高,衣分和铃重最高。

关键词: 脱叶剂, 脱叶率, 单铃重, 衣分, 产量, 交互影响

CLC Number:

S562

CUI Jinxin, LU Xiaoshuang, LI Shengmei, YANG Tao, PANG Bo, WANG Honggang, GAO Wenwei. Defoliant on Cotton Defoliation Effect and Its Influence on the Yield of Different Position Fruit Branches[J]. Xinjiang Agricultural Sciences, 2022, 59(10): 2384-2393.

崔进鑫, 陆小双, 李生梅, 杨涛, 庞博, 王红刚, 高文伟. 脱叶剂喷施时间对棉花脱叶效果及不同部位果枝产量的影响[J]. 新疆农业科学, 2022, 59(10): 2384-2393.

Figures/Tables 7

Fig 1 Maximum/low temperature and precipitation during the application of defoliants from August to October 2020

Fig.2 Effect of spraying time of defoliant on cotton defoliation rate Note: CK:contrast;T1:Apply defoliator when the flocculation rate is 10%-20% (August 29(T1));T2:Apply defoliator when the flocculation rate is 30%-50% (September 5(T2));T2:Apply defoliator when the flocculation rate is 70%-80% (September 12(T3));Different lowercase letters indicate significant differences among different levels of the same factor at 0.05 level; the same as below

Fig.3 The effect of defoliant spraying time on cotton bouncing rate

Fig.4 The effect of spraying time of defoliant on cotton boll release increment

Table1 Influence and comparison of yield and yield components of upland cotton under different defoliants

品种 Variety	处理 Treatlevel	籽棉产量 Seed cotton yield (kg/hm²)	皮棉产量 Lint yield (kg/hm²)	衣分 Lint percentage (%)	铃重 Boll weight (g)
苗宝21号 Miao bao21	CK	5 108.93^b	2 284.27^a	46.42^a	4.34^a
	T₁	6 322.89^ab	2 776.04^a	43.21^ab	4.79^a
	T₂	7 858.56^a	3 262.20^a	41.26^b	4.92^a
	T₃	6 195.97^ab	2 668.54^a	42.53^ab	4.02^a
农大1号 Nongda 1	CK	4 847.28^ab	2 233.55^ab	45.28^a	4.25^a
	T₁	5 355.91^ab	2 437.47^ab	44.89^a	4.41^a
	T₂	6 610.52^a	2 993.10^a	42.99^a	4.53^a
	T₃	4 647.59^b	2 105.75^b	44.41^a	4.42^a
国新73号 Guoxin 73	CK	5 967.38^a	2 582.49^a	43.04^a	5.35^a
	T₁	5 641.79^a	2 427.03^a	43.24^a	5.10a
	T₂	5 741.49^a	2 494.47^a	42.95^a	5.27^a
	T₃	6 032.70^a	2 863.33^a	44.62^a	5.12^a
C₁	CK	5 288.98^a	2 320.25^a	43.72^ab	5.04^a
	T₁	4 733.72^a	1 936.50^a	39.26^c	4.64^a
	T₂	5 404.67^a	2 378.72^a	44.73^a	5.02^a
	T₃	5 716.38^a	2 377.40^a	41.46^bc	5.26^a
新陆早37号 Xinluzao 37	CK	5 390.87^a	2 310.47^a	43.15^a	4.68^a
	T₁	3 880.23^a	1 722.80^a	42.87^a	3.90^b
	T₂	3 763.75^a	1 677.77^a	43.37^a	4.63^a
	T₃	5 082.44^a	2 286.24^a	43.51^a	4.90^a
P 值 P value	V	4.43^**	4.203^**	2.379^ns	8.478^**
	T	1.062^ns	1.066^ns	2.59^ns	1.349^ns
	V×T	1.466^ns	1.326^ns	2.67^**	1.63^ns

Table 2 Yield statistics and interactive comparison under different defoliants, varieties and branch locations

因素 Factor	因素水平 Factor level	籽棉产量 Seed cotton yield (kg/hm²)	皮棉产量 Lint yield (kg/hm²)	衣分 Lint percentage (%)	铃重 Boll weight (g)
品种 Variety (V)	苗宝21号	2 123.83^a	915.95^a	0.43^ab	4.52^b
	农大1号	1 788.41^bc	885.11^a	0.44^a	4.40^b
	国新73号	1 948.64^ab	863.93^a	0.4 ${3^{a}}^{b}$	5.21^a
	C1	1 761.92^bc	793.15^a	0.42^b	4.99^a
	新陆早37号	1 509.75^c	666.45^b	0.43^ab	4.53^b
处理水平 Treatlevel (T)	CK	1 728.91^a	753.34^a	0.44^a	4.73^a
	T₁	1 958.67^a	853.75^a	0.42^b	4.57^a
	T₂	1 845.08^a	820.06^a	0.43^ab	4.87^a
	T₃	1 773.52^a	872.54^a	0.43^ab	4.75^a
果枝位置 Fruiting branch position (FB)	UL_1-3	856.71^c	400.44^c	0.41^b	4.31^b
	ML_4-6	1 862.33^b	852.52^b	0.44^a	4.95^a
	LL_≥7	2 760.45^a	1 221.75^a	0.44^a	4.94^a
P 值 P value	V	5.05^**	5.027^**	2.124^ns	8.715^**
	T	1.211^ns	1.747^**	2.313^ns	1.387^ns
	FB	145.91^**	143.372^**	18.455^**	15.966^**
	V×T	1.671^ns	1.916^*	2.384^**	1.676^ns
	V×FB	1.069^ns	1.362^ns	1.478^ns	3.929^**
	T×FB	0.707^ns	2.712^**	1.792^ns	2.296^*
	V×T×FB	1.093^ns	1.365^*	1.244^ns	1.343^ns

Table 2 Yield statistics and interactive comparison under different defoliants, varieties and branch locations

因素 Factor	因素水平 Factor level	籽棉产量 Seed cotton yield (kg/hm²)	皮棉产量 Lint yield (kg/hm²)	衣分 Lint percentage (%)	铃重 Boll weight (g)
品种 Variety (V)	苗宝21号	2 123.83^a	915.95^a	0.43^ab	4.52^b
	农大1号	1 788.41^bc	885.11^a	0.44^a	4.40^b
	国新73号	1 948.64^ab	863.93^a	0.4 ${3^{a}}^{b}$	5.21^a
	C1	1 761.92^bc	793.15^a	0.42^b	4.99^a
	新陆早37号	1 509.75^c	666.45^b	0.43^ab	4.53^b
处理水平 Treatlevel (T)	CK	1 728.91^a	753.34^a	0.44^a	4.73^a
	T₁	1 958.67^a	853.75^a	0.42^b	4.57^a
	T₂	1 845.08^a	820.06^a	0.43^ab	4.87^a
	T₃	1 773.52^a	872.54^a	0.43^ab	4.75^a
果枝位置 Fruiting branch position (FB)	UL_1-3	856.71^c	400.44^c	0.41^b	4.31^b
	ML_4-6	1 862.33^b	852.52^b	0.44^a	4.95^a
	LL_≥7	2 760.45^a	1 221.75^a	0.44^a	4.94^a
P 值 P value	V	5.05^**	5.027^**	2.124^ns	8.715^**
	T	1.211^ns	1.747^**	2.313^ns	1.387^ns
	FB	145.91^**	143.372^**	18.455^**	15.966^**
	V×T	1.671^ns	1.916^*	2.384^**	1.676^ns
	V×FB	1.069^ns	1.362^ns	1.478^ns	3.929^**
	T×FB	0.707^ns	2.712^**	1.792^ns	2.296^*
	V×T×FB	1.093^ns	1.365^*	1.244^ns	1.343^ns

Table 3 Effect of defoliant on the yield in different parts of Cotton

品种 Varieity	处理 Trea tmet	籽棉产量 Seed cotton yield(kg/hm²)			皮棉产量 Lint yield(kg/hm²)			衣分 Lint percentage(%)			铃重 Boll weight(g)
品种 Varieity	处理 Trea tmet	UL_1-3	ML_4-6	LL_≥7	UL_1-3	ML_4-6	LL_≥7	UL_1-3	ML_4-6	LL_≥7	UL_1-3	ML_4-6	LL_≥7
苗宝21号 Miaobao 21	CK	1 095.4^a	1 726.3^a	2 287.1^c	506.0^a	864.7^a	913.4^c	46.70^a	51.39^a	41.20^a	4.30^a	4.35^a	4.36^b
	T₁	1 158.9^a	2 212.0^a	2 951.7^ab	486.7^a	1 004.4^a	1 284.8^ab	40.68^a	45.23^a	43.75^a	3.91^a	4.70^a	5.76^a
	T₂	1 659.3^a	2 376.5^a	3 822.6^a	676.2^a	1 002.1^a	1 583.7^a	40.75^a	41.66^a	41.38^a	4.99^a	4.94^a	4.84^ab
	T₃	1 228.9^a	1 776.5^a	3 190.4^ab	514.6^a	751.6^a	1 402.1^a	41.69^a	42.00^a	43.93^a	3.85^a	3.61^a	4.58^b
农大1号 Nongda 1	CK	648.3^a	1 873.0^b	2 325.9^a	879.2^a	1 131.6^a	1 074.0^a	42.28^ab	47.39^a	46.18^a	3.92^a	4.39^a	4.45^a
	T₁	822.4^a	1 823.5^b	2 709.8^a	361.2^b	824.8^ab	1 251.3^a	37.23^b	45.51^a	45.91^a	3.69^a	5.40^a	4.14^a
	T₂	524.3^a	2 934.5^a	3 151.5^a	194.3^b	1 306.5^a	1 492.1^a	43.25^a	44.42^a	47.34^a	4.01^a	5.21^a	4.36^a
	T₃	622.0^a	1 269.4^b	2 756.1^a	260.8^b	577.2^b	1 267.6^a	41.85^ab	45.43^a	45.97^a	3.74^a	4.87^a	4.65^a
国新73号 Guoxin 73	CK	638.6^a	2 086.7^a	3 241.9^a	267.1^a	911.2^a	1 404.0^a	42.04^a	43.77^a	46.56^a	5.04^a	5.32^a	5.69^a
	T₁	956.2^a	1 921.6^a	2 763.8^a	402.4^a	830.5^a	1 194.0^a	42.39^a	44.91^a	43.32^b	4.47^a	5.60^a	5.22^a
	T₂	968.1^a	1 881.5^a	2 891.8^a	391.8^a	856.7^a	1 245.8^a	39.88^a	45.85^a	43.13b	4.61^a	5.43^a	5.76^a
	T₃	605.0^a	2 535.0^a	2 892.6^a	256.3^a	1137.7^a	1469.1^a	41.63^a	43.23^a	43.22^b	4.01^a	5.94^a	5.43^a
C₁	CK	1 196.6^a	1 726.8^a	2 365.4^a	784.5^a	1 009.8^a	1 030.8^a	42.1 ${2^{a}}^{b}$	45.94^a	43.12^a	4.96^a	5.42^a	4.73^a
	T₁	464.7^a	1 335.8^a	2 933.1^a	169.0^c	541.2^a	1 226.2^a	39.15^b	44.27^b	45.19^a	4.37^a	4.47^a	5.09^a
	T₂	1 387.5^a	1 851.5^a	2 165.5^a	606. ${2^{a}}^{b}$	832.0^a	940.4^a	46.16^a	44.7 ${1^{a}}^{b}$	43.32^a	5.55^a	5.06^a	4.44^a
	T₃	1 247.6^a	1 673.9^a	2 794.8^a	488. ${9^{a}}^{b}$	703.0^a	1 185.3^a	40.6 ${3^{a}}^{b}$	41.5 ${6^{a}}^{b}$	42.20^a	5.82^a	5.22^a	4.74^a
新陆早37号 Xinluzao 37	CK	598.2^a	2 451.9^a	2 340.6^a	245.2^a	1 068.9^a	996.3^a	43.42^a	43.56^a	42.48^b	3.3 ${2^{a}}^{b}$	4.9 ${2^{a}}^{b}$	5.81^a
	T₁	311.3^a	1 236.8^b	2 332.0^a	123.1^a	544.4^b	1 055.1^a	39.15^a	44.27^a	45.1 ${9^{a}}^{b}$	2.39^b	4.4 ${9^{a}}^{b}$	4.83^a
	T₂	486.8^a	919.0^b	2 357.9^a	187.4^a	412.2^b	1 078.0^a	39.27^a	44.88^a	45.99^a	5.00^a	4.34^b	4.56^a
	T₃	514.6^a	1 633. ${5^{a}}^{b}$	2 934.2^a	207.6^a	738. ${3^{a}}^{b}$	1 340.2^a	39.73^a	45.49^a	45.3 ${4^{a}}^{b}$	4.19^a	5.30^a	5.23^a
P值 P value	V	5.505^**	1.762^ns	2.377^ns	5.638^**	2.014^ns	2.184^ns	0.545^ns	1.092^ns	6.386^**	6.129^**	4.227^**	6.345^**
	T	0.779^ns	0.758^ns	1.905^ns	0.653^ns	1.048^ns	2.729^ns	1.892^ns	2.381^ns	1.313^ns	4.234^*	0.081^ns	0.465^ns
	V×T	0.806^ns	1.987^ns	1.098^ns	0.865^ns	1.844^ns	1.132^ns	1.736^ns	1.762^ns	1.002^ns	1.353^ns	1.357^**	1.81^ns

Table 3 Effect of defoliant on the yield in different parts of Cotton

品种 Varieity	处理 Trea tmet	籽棉产量 Seed cotton yield(kg/hm²)			皮棉产量 Lint yield(kg/hm²)			衣分 Lint percentage(%)			铃重 Boll weight(g)
品种 Varieity	处理 Trea tmet	UL_1-3	ML_4-6	LL_≥7	UL_1-3	ML_4-6	LL_≥7	UL_1-3	ML_4-6	LL_≥7	UL_1-3	ML_4-6	LL_≥7
苗宝21号 Miaobao 21	CK	1 095.4^a	1 726.3^a	2 287.1^c	506.0^a	864.7^a	913.4^c	46.70^a	51.39^a	41.20^a	4.30^a	4.35^a	4.36^b
	T₁	1 158.9^a	2 212.0^a	2 951.7^ab	486.7^a	1 004.4^a	1 284.8^ab	40.68^a	45.23^a	43.75^a	3.91^a	4.70^a	5.76^a
	T₂	1 659.3^a	2 376.5^a	3 822.6^a	676.2^a	1 002.1^a	1 583.7^a	40.75^a	41.66^a	41.38^a	4.99^a	4.94^a	4.84^ab
	T₃	1 228.9^a	1 776.5^a	3 190.4^ab	514.6^a	751.6^a	1 402.1^a	41.69^a	42.00^a	43.93^a	3.85^a	3.61^a	4.58^b
农大1号 Nongda 1	CK	648.3^a	1 873.0^b	2 325.9^a	879.2^a	1 131.6^a	1 074.0^a	42.28^ab	47.39^a	46.18^a	3.92^a	4.39^a	4.45^a
	T₁	822.4^a	1 823.5^b	2 709.8^a	361.2^b	824.8^ab	1 251.3^a	37.23^b	45.51^a	45.91^a	3.69^a	5.40^a	4.14^a
	T₂	524.3^a	2 934.5^a	3 151.5^a	194.3^b	1 306.5^a	1 492.1^a	43.25^a	44.42^a	47.34^a	4.01^a	5.21^a	4.36^a
	T₃	622.0^a	1 269.4^b	2 756.1^a	260.8^b	577.2^b	1 267.6^a	41.85^ab	45.43^a	45.97^a	3.74^a	4.87^a	4.65^a
国新73号 Guoxin 73	CK	638.6^a	2 086.7^a	3 241.9^a	267.1^a	911.2^a	1 404.0^a	42.04^a	43.77^a	46.56^a	5.04^a	5.32^a	5.69^a
	T₁	956.2^a	1 921.6^a	2 763.8^a	402.4^a	830.5^a	1 194.0^a	42.39^a	44.91^a	43.32^b	4.47^a	5.60^a	5.22^a
	T₂	968.1^a	1 881.5^a	2 891.8^a	391.8^a	856.7^a	1 245.8^a	39.88^a	45.85^a	43.13b	4.61^a	5.43^a	5.76^a
	T₃	605.0^a	2 535.0^a	2 892.6^a	256.3^a	1137.7^a	1469.1^a	41.63^a	43.23^a	43.22^b	4.01^a	5.94^a	5.43^a
C₁	CK	1 196.6^a	1 726.8^a	2 365.4^a	784.5^a	1 009.8^a	1 030.8^a	42.1 ${2^{a}}^{b}$	45.94^a	43.12^a	4.96^a	5.42^a	4.73^a
	T₁	464.7^a	1 335.8^a	2 933.1^a	169.0^c	541.2^a	1 226.2^a	39.15^b	44.27^b	45.19^a	4.37^a	4.47^a	5.09^a
	T₂	1 387.5^a	1 851.5^a	2 165.5^a	606. ${2^{a}}^{b}$	832.0^a	940.4^a	46.16^a	44.7 ${1^{a}}^{b}$	43.32^a	5.55^a	5.06^a	4.44^a
	T₃	1 247.6^a	1 673.9^a	2 794.8^a	488. ${9^{a}}^{b}$	703.0^a	1 185.3^a	40.6 ${3^{a}}^{b}$	41.5 ${6^{a}}^{b}$	42.20^a	5.82^a	5.22^a	4.74^a
新陆早37号 Xinluzao 37	CK	598.2^a	2 451.9^a	2 340.6^a	245.2^a	1 068.9^a	996.3^a	43.42^a	43.56^a	42.48^b	3.3 ${2^{a}}^{b}$	4.9 ${2^{a}}^{b}$	5.81^a
	T₁	311.3^a	1 236.8^b	2 332.0^a	123.1^a	544.4^b	1 055.1^a	39.15^a	44.27^a	45.1 ${9^{a}}^{b}$	2.39^b	4.4 ${9^{a}}^{b}$	4.83^a
	T₂	486.8^a	919.0^b	2 357.9^a	187.4^a	412.2^b	1 078.0^a	39.27^a	44.88^a	45.99^a	5.00^a	4.34^b	4.56^a
	T₃	514.6^a	1 633. ${5^{a}}^{b}$	2 934.2^a	207.6^a	738. ${3^{a}}^{b}$	1 340.2^a	39.73^a	45.49^a	45.3 ${4^{a}}^{b}$	4.19^a	5.30^a	5.23^a
P值 P value	V	5.505^**	1.762^ns	2.377^ns	5.638^**	2.014^ns	2.184^ns	0.545^ns	1.092^ns	6.386^**	6.129^**	4.227^**	6.345^**
	T	0.779^ns	0.758^ns	1.905^ns	0.653^ns	1.048^ns	2.729^ns	1.892^ns	2.381^ns	1.313^ns	4.234^*	0.081^ns	0.465^ns
	V×T	0.806^ns	1.987^ns	1.098^ns	0.865^ns	1.844^ns	1.132^ns	1.736^ns	1.762^ns	1.002^ns	1.353^ns	1.357^**	1.81^ns

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