文献类型： 外文期刊

作者： Song, Xinghu ¹ ; Zhang, Lijuan ² ; Zhao, Wenchao ³ ; Xu, Daoqing ⁴ ; Eneji, A. Egrinya ⁵ ; Zhang, Xiang ⁶ ; Han, Huanyong ⁷ ; Cao, Longlong ⁸ ; Zhang, Wangfeng ⁹ ; Lu, Zhengying ¹⁰ ; Huang, Xiaoli ¹¹ ; Wang, Hongzhe ¹² ; Xu, Dongyong ¹³ ; Luo, Zhen ¹⁴ ; Chen, Hongzhang ¹⁵ ; Zhang, Lizhen ¹⁶ ; Du, Mingwei ¹ ; Tian, Xiaoli ¹ ; Li, Zhaohu ¹ ;

作者机构： 1.China Agr Univ, Coll Agron & Biotechnol, Engn Res Ctr Plant Growth Regulator, Minist Educ, Beijing 100193, Peoples R China

2.Cotton Res Inst Jiangxi Prov, Jiujiang 332105, Jiangxi, Peoples R China

3.Dezhou Acad Agr Sci, Dezhou 253015, Peoples R China

4.Anhui Acad Agr Sci, Cotton Res Inst, Hefei 230031, Peoples R China

5.Univ Calabar, Fac Agr Forestry & Wildlife Resources Management, Dept Soil Sci, Calabar 540271, Nigeria

6.Yangzhou Univ, Coll Agr, Yangzhou 225000, Jiangsu, Peoples R China

7.Xinjiang Acad Agr Reclamat, Cotton Inst, Shihezi 832000, Peoples R China

8.Binzhou Agr Mechanizat Res Inst, Wudi 256600, Peoples R China

9.Shihezi Univ, Coll Agr, Shihezi 832000, Peoples R China

10.Handan Acad Agr Sci, Early Maturing Cotton Res Inst, Handan 056000, Peoples R China

11.Huanggang Acad Agr Sci, Huanggang 438000, Peoples R China

12.Xinjiang Cottonseed Engn Technol Res Ctr, Luntai 841600, Peoples R China

13.Hebei Cottonseed Engn Technol Res Ctr, Hejian 062450, Peoples R China

14.Hubei Agr Technol Extens Stn, Wuhan 430070, Peoples R China

15.Xinjiang Shouxin Seed Co Ltd, Shaya 842200, Peoples R China

16.China Agr Univ, Coll Resources & Environm Sci, Beijing 100193, Peoples R China

期刊名称：CROP SCIENCE （ 影响因子：2.763； 五年影响因子：2.856 ）

ISSN： 0011-183X

年卷期： 2022 年 62 卷 3 期

页码：

收录情况： SCI

摘要： Defoliation is used to ease mechanical harvest and reduce lint staining of cotton (Gossypium hirsutum L.). Crop conditions are important determinants of its efficiency, but their effects have not been fully examined. We performed a multiple-site field study during 2018-2020 (under 17 environmental conditions, covering three cotton regions in China) to explore the relationship between boll retention and defoliation at the fruiting site level. The hormonal defoliant, thidiazuron and boll opener, ethephon, were tank-mixed or their combination product was used in this study. There was a positive Spearman ranking correlation between boll retention and defoliation in most experimental sites, with correlation coefficients (r) ranging from .275 to .725 at 7 d after application of harvest aids, suggesting that the leaves at fruiting sites bearing bolls dropped more easily than those at fruiting sites where abscission occurred. The positive correlation declined with the fruiting sites up the plant and away the mainstem. The differences in defoliation between fruiting sites with or without bolls were high (around 60-70%) at lower and/or inner positions, but low or negligible at upper and/or outer positions. It appears that the higher light intensity at upper and outer portions of plant may enhance leaf drop and thus reduce the dependence of defoliation on boll retention. In conclusion, a high boll retention would accelerate leaf removal, and may enhance leaf abscission on cloudy days or within more closed canopy.