夏播短季栽培模式下棉花产量及纤维品质对脱叶催熟剂喷施时间的响应

谢章书, 荣志凌, 覃业玲, 李侃, 周仲华, 屠小菊, 汪启明, 刘爱玉

Response of Cotton Yield and Fiber Quality to the Timing of Defoliant Spraying under Summer-Sown Short-Season Cultivation Pattern

Xie Zhangshu, Rong Zhiling, Qin Yeling, Li Kan, Zhou Zhonghua, Tu Xiaoju, Wang Qiming, Liu Aiyu

表4 脱叶剂喷施时间对后期开花（8月30日）棉铃纤维品质的影响

Table 4 Effects of defoliant spraying time on fiber quality of cotton bolls at late flowering (August 30)

花后天数 Days post-anthesis 上半部平均长度 Average length of upper half (mm) 整齐度指数 Uniformity index (%) 断裂比强度 Fiber strength (cN/tex) 马克隆值 Micronaire value 伸长率 Elongation rate (%) 34 (10-03) 30.06±0.56a 83.63±0.32b 28.67±0.41a 3.63±0.16c 4.90±0.06a 37 (10-06) 30.20±0.15a 83.76±0.29a 29.20±0.97a 3.90±0.15bc 5.03±0.06a 40 (10-09) 30.70±0.43a 83.86±0.30a 29.63±0.88a 4.17±0.05ab 5.07±0.20a 43 (10-12) 31.00±0.45a 84.13±0.28a 29.67±0.71a 4.17±0.05ab 5.16±0.11a 46 (10-15) 30.70±0.17a 84.15±0.25a 30.06±0.20a 4.33±0.05a 5.17±0.20a