Effects of different types of salt and alkali stress on cotton seed germination

doi:10.6048/j.issn.1001-4330.2024.08.002

Xinjiang Agricultural Sciences ›› 2024, Vol. 61 ›› Issue (8): 1831-1844.DOI: 10.6048/j.issn.1001-4330.2024.08.002

• Crop Genetics and Breeding · Germplasm Resources · Molecular Genetics · Cultivation Physiology · Physiology and Biochemistry • Previous Articles Next Articles

Effects of different types of salt and alkali stress on cotton seed germination

DONG Zhiduo¹^,²(), XU Fei¹^,³, FU Qiuping², HUANG Jian¹, QI Tong¹(), MENG Ajing¹, FU Yanbo¹^,³, Kaisaier Kuerban³

1. Key Laboratory of Saline-alkali Soil Improvement and Utilization (Saline-Alkali Land in Arid and Semi-Arid Regions), Ministry of Agriculture and Rural Affairs, P. R. China,Urumqi 830091, China
2. College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, China
3. Baicheng Agricultural Experimental Station of Xinjiang Academy of Agricultural Sciences / National Soil Quality Aksu Observation Experimental Station, Aksu Xinjiang 843000, China

Received:2024-02-01 Online:2024-08-20 Published:2024-09-19
Correspondence author: QI Tong
Supported by:
The Major Scientific R & D Program Project of Xinjiang Uygur Autonomous Region(2022A02007-1)

不同类型盐碱胁迫对棉花种子萌发的影响

董志多¹^,²(), 徐菲¹^,³, 付秋萍², 黄建¹, 祁通¹(), 孟阿静¹, 付彦博¹^,³, 开赛尔·库尔班³

1.新疆农业科学院土壤肥料与农业节水研究所/农业农村部盐碱土改良与利用(干旱半干旱区盐碱地)重点实验室,乌鲁木齐 830091
2.新疆农业大学水利与土木工程学院,乌鲁木齐 830052
3.新疆农业科学院拜城农业试验站/国家土壤质量阿克苏观测试验站,新疆阿克苏 843000

通讯作者: 祁通
作者简介:董志多(1997-),女,新疆塔城人,硕士研究生,研究方向为盐碱土改良与利用,(E-mail)dzd1281228561@163.com
基金资助:
新疆维吾尔自治区重大专项(2022A02007-1)

Abstract

Abstract:

【Objective】 This study aims to investigate the influence and threshold of different types of saline-alkali stress on the germination of cotton seeds. 【Methods】 Four types of saline-alkali stress and seven concentration levels were simulated by Petri dish method. Cotton seeds of Xinluzhong 84, Tahe 2, Xinluzhong 40 and Jiumian 18 were used as research objects. The germination potential, germination rate, germination index, seed vigor index, fresh weight and dry weight of seedlings after germination were analyzed, salt tolerance threshold and membership function values were calculated, and comprehensive evaluation was carried out. 【Results】 (1) The germination potential, germination rate, germination index, vitality index, fresh weight and dry weight of cotton seed after germination showed a significant downward trend under the four types of saline-alkali stress. There was a significant negative correlation between saline-alkali concentration and all indexes, and the correlation between saline-alkali concentration and germination rate was more than -0.90. (2) The salt tolerance thresholds of cotton at germination stage were different under the four types of saline-alkali stress conditions. The salt tolerance thresholds under S₁ stress ranged from 90.70 to 121.73 mmol/L. The salt tolerance threshold under S₂ stress ranged from 82.68 to 128.30 mmol/L. The salt tolerance threshold under S₃ stress ranged from 51.97 to 84.62 mmol/L. The salt tolerance threshold under S₄ stress ranged from 73.49 to 98.21 mmol/L. (3) The salt tolerance of cotton seeds under four kinds of saline-alkali stress was analyzed by membership function and its order was Xinluzhong 84 > Xinluzhong 40 > Tahe 2 > Jiumian 18 under S₁ stress, Xinluzhong 84 > Tahe 2 > Xinluzhong 40 > Jiumian 18 under S₂ stress, and Tahe 2 > Xinluzhong 40 > Xinluzhong 84 > Jiumian 18 under S₃ stress. It was found that the order of salt tolerance of cotton seeds under S₄ stress was consistent with that under S₂ stress. 【Conclusion】 The germination potential, germination rate, germination index and vigor index of cotton seeds are decreased under the four types of saline-alkali stress, and the fresh and dry weight of seedlings shows a downward trend with the increase of the concentration. The effect of alkaline salt on the germination of cotton seed is obviously greater than that of neutral salt.

Key words: cotton; salt stress; seed germination; salt tolerance; germination rate

摘要：

【目的】研究不同类型盐碱胁迫对棉花种子萌发的影响并计算耐盐阈值。【方法】采用培养皿法,模拟设置4种类型盐碱胁迫和7个浓度处理,以新陆中84号、塔河2号、新陆中40号和酒棉18号棉花种子为研究对象,分析盐碱胁迫下棉花种子的发芽势、发芽率、发芽指数、种子活力指数、萌发后幼苗鲜重和干重变化,计算耐盐阈值和隶属函数值,并综合评价。【结果】 (1)在4种盐碱胁迫下,棉花种子的发芽势、发芽率、发芽指数、活力指数、萌发后幼苗的鲜重和干重均呈显著下降趋势。盐碱浓度与各项指标均呈极显著负相关,其中与发芽率的相关性超过-0.90。(2)在4种盐碱胁迫条件下棉花萌发期的耐盐阈值存在差异,S₁胁迫下耐盐阈值为90.70~121.73 mmol/L;S₂胁迫下耐盐阈值为82.68~128.30 mmol/L;S3胁迫下耐盐阈值为51.97~84.62 mmol/L。S₄胁迫下耐盐阈值为73.49~98.21 mmol/L。(3)棉花种子耐盐性由强至弱的顺序在S₁胁迫下为新陆中84号>新陆中40号>塔河2号>酒棉18号,在S₂胁迫下为新陆中84号>塔河2号>新陆中40号>酒棉18号,在S₃胁迫下为塔河2号>新陆中40号>新陆中84号>酒棉18号,S₄胁迫下各品种棉花种子耐盐强弱顺序与S₂胁迫一致。【结论】4种盐碱胁迫下均降低了棉花种子的发芽势、发芽率、发芽指数和活力指数,随着浓度升高,幼苗的鲜重和干重均呈下降趋势。碱性盐对棉花种子萌发影响明显大于中性盐。

关键词: 棉花, 盐胁迫, 种子萌发, 耐盐性, 发芽率

CLC Number:

S562

DONG Zhiduo, XU Fei, FU Qiuping, HUANG Jian, QI Tong, MENG Ajing, FU Yanbo, Kaisaier Kuerban. Effects of different types of salt and alkali stress on cotton seed germination[J]. Xinjiang Agricultural Sciences, 2024, 61(8): 1831-1844.

董志多, 徐菲, 付秋萍, 黄建, 祁通, 孟阿静, 付彦博, 开赛尔·库尔班. 不同类型盐碱胁迫对棉花种子萌发的影响[J]. 新疆农业科学, 2024, 61(8): 1831-1844.

Figures/Tables 13

References 33

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品种 Cultivar	千粒重 Thousandgrain weight (g)	提供单位 Provider
新陆中84号 Xinluzhong 84	93.65	新疆天玉种业有限责任公司
塔河2号 Tahei 2	91.45	新疆塔里木河种业股份有限公司
新陆中40号 Xinluzhong 40	91.97	阿克苏科润种业有限责任公司
酒棉18号 Jiumian 18	89.06	新疆守信种业科技有限责任公司

品种 Cultivar	千粒重 Thousandgrain weight (g)	提供单位 Provider
新陆中84号 Xinluzhong 84	93.65	新疆天玉种业有限责任公司
塔河2号 Tahei 2	91.45	新疆塔里木河种业股份有限公司
新陆中40号 Xinluzhong 40	91.97	阿克苏科润种业有限责任公司
酒棉18号 Jiumian 18	89.06	新疆守信种业科技有限责任公司

处理 Treatments	浓度 Concentration (mmol/L)	pH值 pH value	电导率 Electrical conductivity (mS/cm)	处理 Treatments	浓度 Concentration (mmol/L)	pH值 pH value	电导率 Electrical conductivity (mS/cm)
S₁	40	7	4.78	S₃	40	9	3.1
	60	7	7.39		60	9.1	4.31
	80	7	9.84		80	9.2	5.7
	100	7	12.19		100	9.2	6.94
	120	7	14.45		120	9.4	8.4
	140	7	16.76		140	9.5	9.75
	160	7.2	18.17		160	9.5	10.74
S₂	40	7	4.14	S₄	40	9	0.18
	60	7.2	5.84		60	9	2.65
	80	7.2	7.75		80	9	3.4
	100	7.2	9.69		100	9	4.32
	120	7.2	11.97		120	9	5.25
	140	7.5	13.68		140	9.1	6.11
	160	7.5	15.19		160	9.1	6.75

处理 Treatments	浓度 Concentration (mmol/L)	pH值 pH value	电导率 Electrical conductivity (mS/cm)	处理 Treatments	浓度 Concentration (mmol/L)	pH值 pH value	电导率 Electrical conductivity (mS/cm)
S₁	40	7	4.78	S₃	40	9	3.1
	60	7	7.39		60	9.1	4.31
	80	7	9.84		80	9.2	5.7
	100	7	12.19		100	9.2	6.94
	120	7	14.45		120	9.4	8.4
	140	7	16.76		140	9.5	9.75
	160	7.2	18.17		160	9.5	10.74
S₂	40	7	4.14	S₄	40	9	0.18
	60	7.2	5.84		60	9	2.65
	80	7.2	7.75		80	9	3.4
	100	7.2	9.69		100	9	4.32
	120	7.2	11.97		120	9	5.25
	140	7.5	13.68		140	9.1	6.11
	160	7.5	15.19		160	9.1	6.75

处理 Treat- ments	浓度 Conce- ntration (mmol/L)	新陆中84号Xinluzhong 84		塔河2号Tahe 2		新陆中40号Xinluzhong 40		酒棉18号Jiumian 18
处理 Treat- ments	浓度 Conce- ntration (mmol/L)	初始萌发时间 GIT(d)	平均萌发天数 AGT(d)	初始萌发时间 GIT(d)	平均萌发天数 AGT(d)	初始萌发时间 GIT(d)	平均萌发天数 AGT(d)	初始萌发时间 GIT(d)	平均萌发天数 AGT(d)
S₁	0	3	1.29±0.04^b	3	1.02±0.1^b	3	1.35±0.03^b	3	1.35±0.18^a
	40	3	1.65±0.08^a	3	1.4±0.18^a	3	1.62±0.07^a	3	1.45±0.13^a
	60	3	1.84±0.05^a	3	1.41±0.19^a	3	1.67±0.07^a	3	1.34±0.08^a
	80	3	1.66±0.03^a	4	1.21±0.1^ab	3	0.81±0.05^c	3	1.18±0.25^a
	100	4	1.18±0.04^bc	5	0.53±0.05^c	4	0.78±0.13^c	4	0.8±0.17^b
	120	4	1.03±0.25^cd	6	0.44±0.11^cd	5	0.68±0.16^c	5	0.1±0.1^c
	140	5	0.8±0.17^d	6	0.22±0.06^de	5	0.35±0.03^d	-	0±0^c
	160	7	0.23±0.12^e	6	0.07±0.06^e	-	0±0^e	-	0±0^c
S₂	0	3	1.29±0.04^b	3	1.02±0.1^b	3	1.35±0.03^a	3	1.35±0.18^a
	40	3	1.74±0.1^a	3	1.38±0.21^a	3	1.44±0.22^a	3	1.62±0.16^a
	60	3	1.79±0.06^a	3	1.18±0.24^ab	3	0.92±0.35^b	3	1.46±0.36^a
	80	3	1.88±0.13^a	3	1.01±0.16^b	3	0.91±0.15^b	3	1.36±0.2^a
	100	4	1.88±0.08^a	3	0.65±0.12^c	3	0.79±0.21^b	4	0.79±0.12^b
	120	5	1.39±0.12^b	3	0.33±0.15^d	4	0.27±0.03^c	8	0.45±0.1^bc
	140	6	0.68±0.06^c	6	0.16±0.04^d	5	0.19±0.02^c	12	0.1±0.09^cd
	160	-	0±0^d	10	0.14±0.01^d	11	0.1±0.09^c	-	0±0^d
S₃	0	3	1.29±0.04^c	3	1.02±0.1^b	3	1.35±0.03^b	3	1.35±0.18^b
	40	3	2.07±0.03^a	3	1.56±0.11^a	3	1.58±0.13^a	5	1.78±0.14^a
	60	3	1.54±0.18^b	3	0.69±0.1^c	3	1.68±0.08^a	6	0.64±0.07^c
	80	3	1.24±0.16^c	3	0.73±0.12^c	3	1.04±0.1^c	12	0.05±0.09^d
	100	7	1.16±0.08^c	5	0.69±0.07^c	7	0.74±0.08^d	-	0±0^d
	120	-	0±0^d	-	0±0^d	7	0.12±0.13^e	-	0±0^d
	140	-	0±0^d	-	0±0^d	-	0±0^e	-	0±0^d
	160	-	0±0^d	-	0±0^d	-	0±0^e	-	0±0^d
S₄	0	3	1.29±0.04^b	3	1.02±0.1^b	3	1.35±0.03^bc	3	1.35±0.18^c
	40	3	1.84±0.09^a	3	1.44±0.02^a	3	2.2±0.04^a	3	2.14±0.05^a
	60	3	2±0.15^a	3	1.45±0.13^a	5	2.25±0.05^a	4	1.56±0.01^b
	80	5	1.94±0.13^a	5	0.72±0.07^c	7	1.53±0.04^b	5	0.87±0.05^d
	100	5	1.03±0.16^c	7	0.18±0.08^d	7	1.2±0.24^c	12	0.15±0^e
	120	5	0.26±0.08^d	7	0.08±0.08^de	11	0.15±0.01^d	-	0±0^f
	140	9	0.09±0.08^de	-	0±0^e	-	0±0^d	-	0±0^f
	160	-	0±0^e	-	0±0^e	-	0±0^d	-	0±0^f

Effects of different types of salt and alkali stress on cotton seed germination

不同类型盐碱胁迫对棉花种子萌发的影响

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品种 Cultivar	盐浓度 Salt concen- tration (mmol/L)	S₁		S₂		S₃		S₄
品种 Cultivar	盐浓度 Salt concen- tration (mmol/L)	鲜重 Fresh weight	干重 Dry weight	鲜重 Fresh weight	干重 Dry weight	鲜重 Fresh weight	干重 Dry weight	鲜重 Fresh weight	干重 Dry weight
新陆中84号 Xinluzhong 84	0	2.54±0.02^a	0.58±0.01^a	2.54±0.02^a	0.58±0.01^a	2.54±0.02^a	0.58±0.01^a	2.54±0.02^a	0.58±0.01^a
	40	2.5±0^a	0.57±0.01^b	2.51±0.01^a	0.58±0.01^a	1.44±0.04^b	0.52±0.01^b	1.98±0.04^b	0.55±0.02^b
	60	2.42±0.09^a	0.56±0.01^b	2.31±0.06^b	0.55±0^b	1.18±0.01^c	0.52±0^b	1.84±0.01^c	0.54±0.01^bc
	80	2.26±0.11^b	0.55±0^c	1.76±0.12^c	0.51±0.01^c	1.08±0^d	0.51±0^bc	1.8±0.04^c	0.52±0.01^c
	100	2.12±0.06^c	0.53±0^d	1.75±0.13^c	0.51±0.01^c	1.03±0^e	0.5±0^c	1.63±0.05^d	0.52±0^c
	120	1.96±0.04^d	0.51±0^e	1.53±0.01^d	0.5±0^c	0±0^f	0±0^d	1.2±0^e	0.43±0^d
	140	1.87±0.03^d	0.45±0.01^f	1.33±0^e	0.5±0^c	0±0^f	0±0^d	1.1±0^f	0.42±0^d
	160	0±0^e	0±0^g	0±0^f	0±0^d	0±0^f	0±0^d	0±0^g	0±0^e
塔河2号 Tahe 2	0	2.58±0.08^a	0.54±0.03^a	2.58±0.08^b	0.54±0.03^b	2.58±0.08^a	0.54±0.03^a	2.58±0.08^a	0.54±0.03^a
	40	2.51±0.02^a	0.51±0.01^ab	2.87±0.22^a	0.57±0.01^a	2.39±0.04^b	0.51±0.01^b	2.53±0.12^a	0.52±0.01^ab
	60	2.14±0.09^b	0.51±0.01^ab	2.5±0.07^bc	0.51±0.01^c	2.31±0.05^c	0.5±0^b	2.37±0.11^b	0.51±0.01^b
	80	2.08±0.02^b	0.5±0.01^b	2.34±0.03^c	0.5±0^c	2.17±0^d	0.45±0^c	2.29±0.03^b	0.46±0^c
	100	1.9±0^c	0.46±0.01^c	2.1±0.06^d	0.49±0.01^cd	1.8±0^e	0.29±0^d	2.1±0^c	0.45±0^c
	120	1.41±0.11^d	0.46±0.01^c	1.98±0.07^d	0.47±0.01^d	0±0^f	0±0^e	0±0^d	0±0^d
	140	1.3±0.05^de	0.44±0.01^cd	1.88±0.06^d	0.4±0^e	0±0^f	0±0^e	0±0^d	0±0^d
	160	1.23±0^e	0.43±0^d	0±0^e	0±0^f	0±0^f	0±0^e	0±0^d	0±0^d
新陆中40号 Xinluzhong 40	0	2.28±0.04^a	0.53±0^a	2.28±0.04^a	0.53±0^a	2.28±0.04^a	0.53±0^a	2.28±0.04^a	0.53±0^a
	40	1.96±0.06^b	0.52±0.01^ab	1.69±0.06^b	0.47±0.01^b	1.74±0.11^b	0.48±0.01^b	1.53±0.07^b	0.47±0.01^b
	60	1.87±0.1^bc	0.52±0.01^ab	1.56±0^c	0.44±0^c	1.66±0.04^bc	0.43±0.01^c	1.43±0.03^c	0.45±0.01^c
	80	1.79±0.02^c	0.51±0^b	1.56±0^c	0.43±0^d	1.61±0^c	0.43±0^d	1.44±0.01^c	0.44±0.01^c
	100	1.63±0^d	0.48±0^c	1.26±0.03^d	0.43±0.01^d	1.07±0^d	0.41±0^e	1.4±0^c	0.4±0^d
	120	1.6±0.01^de	0.46±0.01^d	1.25±0^d	0.43±0^d	0±0^e	0±0^f	0±0^d	0±0^e
	140	1.51±0^e	0.43±0.01^e	1.21±0^d	0.38±0^e	0±0^e	0±0^f	0±0^d	0±0^e
	160	0±0^f	0±0^f	0±0^e	0±0^f	0±0^e	0±0^f	0±0^d	0±0^e
酒棉18号 Jiumian 18	0	2.25±0.08^a	0.52±0^a	2.25±0.08^a	0.52±0^a	2.25±0.08^a	0.52±0^a	2.25±0.08^a	0.52±0^a
	40	2.19±0.12^a	0.47±0^b	1.66±0.03^b	0.46±0.01^b	1.61±0.14^b	0.45±0.01^b	1.52±0.14^b	0.44±0.01^b
	60	2.02±0.07^b	0.46±0.01^b	1.57±0.04^b	0.46±0^bc	1.25±0.14^c	0.4±0.01^c	1.39±0.14^bc	0.39±0.01^c
	80	1.76±0.06^c	0.46±0.01^bc	1.54±0.19^b	0.45±0^cd	0±0^d	0±0^d	1.28±0.21^c	0.34±0.01^d
	100	1.52±0.01^d	0.44±0.02^c	1.54±0.13^b	0.44±0.01^d	0±0^d	0±0^d	0±0^d	0±0^e
	120	1.5±0^d	0.37±0^d	1.26±0.01^c	0.4±0.01^e	0±0^d	0±0^d	0±0^d	0±0^e
	140	0±0^e	0±0^e	0±0^d	0±0^f	0±0^d	0±0^d	0±0^d	0±0^e
	160	0±0^e	0±0^e	0±0^d	0±0^f	0±0^d	0±0^d	0±0^d	0±0^e

处理 Treatments	发芽势 GP	发芽率 GR	发芽指数 GI	活力指数 VI	鲜重 Fresh weight	干重 Dry weight
S₁	-0.96^**	-0.92^**	-0.97^**	-0.95^**	-0.79^**	-0.66^**
S₂	-0.93^**	-0.90^**	-0.96^**	-0.91^**	-0.79^**	-0.71^**
S₃	-0.80^**	-0.91^**	-0.89^**	-0.84^**	-0.88^**	-0.85^**
S₄	-0.80^**	-0.91^**	-0.91^**	-0.86^**	-0.85^**	-0.80^**

处理 Treatments	品种 Cultivar	拟合方程 Fitting equation	R²	耐盐阈值 Salt tolerance threshold (mmol/L)
S₁	新陆中84号	Y₌ -66.94 + 169.49/[1 + (X_/154.75)^3.33]	0.978 4	121.73
	塔河2号	Y₌3.76 + 85.14/[1 + (X_/89.74)^5.87]	0.987 2	90.70
	新陆中40号	Y₌ -10.38 + 114.06/[1 + (X_/95.48)^3.54]	0.969 4	92.36
	酒棉18号	Y₌ -9.85 + 89.65/[1 + (X_/98.35)^5.49]	0.984 5	91.83
S₂	新陆中84号	Y₌ -30.67 + 130.47/[1 + (X_/136.75)^7.56]	0.999 8	128.30
	塔河2号	Y₌ -8.25+99.48/[1 + (X_/94.49)^3.83]	0.997 3	91.07
	新陆中40号	Y₌ -54.98 + 155.25/[1 + (X_/124.23)^1.81]	0.967 1	82.68
	酒棉18号	Y₌ -11.98 + 99.13/[1 + (X_/101.25)^4.76]	0.992 4	94.35
S₃	新陆中84号	Y₌ -28.98 + 127.10/[1 + (X_/98.9)^3.18]	0.953 4	84.62
	塔河2号	Y₌ -10.03 + 103.48/[1 + (X_/71.05)^2.93]	0.936	68.04
	新陆中40号	Y₌ -8.96 + 105.26/[1 + (X_/85.79)^4.47]	0.984 2	81.27
	酒棉18号	Y₌ -1.18 + 92.19/[1 + (X_/52.30)^6.15]	0.998	51.97
S₄	新陆中84号	Y₌ -1.19 + 98.66/[1 + (X_/99.01)^9.29]	0.999 1	98.21
	塔河2号	Y₌1.61 + 88.19/[1 + (X_/75.69)^11.03]	0.998 4	75.91
	新陆中40号	Y₌ -10.21 + 108/[1 + (X_/96.75)^5.68]	0.978 0	92.90
	酒棉18号	Y₌ -3.13 + 94.29/[1 + (X_/74.41)^6.17]	0.994 4	73.49

处理 Treatments	品种 Cultivar	隶属函数值Subordinate function value						综合评价值 D	排序 Rank
处理 Treatments	品种 Cultivar	发芽势 GP	发芽率 GR	发芽指数 GI	活力指数 VI	鲜重 FW	干重 DW	综合评价值 D	排序 Rank
S₁	新陆中84号	1	1	1	1	1	0.65	0.95	1
	塔河2号	0	0.19	0	0	0.75	1	0.28	3
	新陆中40号	0.27	0.25	0.55	0.37	0.47	0.67	0.40	2
	酒棉18号	0.31	0	0.45	0.45	0	0	0.20	4
	权重	0.20	0.23	0.14	0.16	0.14	0.13	0
S₂	新陆中84号	0.60	1	1	1	0.54	0.99	0.88	1
	塔河2号	1	0.27	0.25	0.81	1	1	0.65	2
	新陆中40号	0.70	0	0.09	0	0.19	0.52	0.19	3
	酒棉18号	0	0.20	0	0.14	0	0	0.06	4
	权重	0.11	0.19	0.24	0.18	0.16	0.12	0
S₃	新陆中84号	0.11	1	0.67	0.29	0.28	1	0.49	3
	塔河2号	1	0.67	0.78	1	1	0.85	0.91	1
	新陆中40号	0.85	0.92	1	0.92	0.67	0.88	0.87	2
	酒棉18号	0	0	0	0	0	0	0	4
	权重	0.24	0.14	0.14	0.18	0.18	0.13	0
S₄	新陆中84号	0.50	1	1	0.77	1	1	0.85	1
	塔河2号	1	0.18	0.74	1	0.92	0.46	0.73	2
	新陆中40号	0	0.73	0.18	0.12	0.36	0.37	0.27	3
	酒棉18号	0.09	0	0	0	0	0	0.02	4
	权重	0.21	0.17	0.17	0.18	0.13	0.14

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