油后移栽棉不同开花时间纤维品质比较研究

摘要

The transplanted cotton following rape harvest is a main crop pattern of cotton cultivation in the Yangtze River Valley. This planting pattern has the advantage of higher land use percentage and labour productivity compared to the pre-vailing cropping patterns. Qwing to the limited growth period,cotton yield and fiber quality usually decrease to a certain ex-tent. In 2012-2013,the bolls flowering at Jul.5,Jul.15,Jul.25,Aug.5,Aug.15,Aug.25 and Sep.5 were analyzed for their quality characters. The result showed that the best boll setting period was from Aug.15 to Aug.25. In this period,the boll's charac-ters,such as the boll setting percentage, boll weight and lint percentage were higher,and the non pregnant seed rate was lower. The fiber quality was also better and suitable for spinning medium count yarn,with detailed value of fiber length 28 mm,specific strength 26 cN/tex, Mic value 5 and spinning consistence index 130.%对2012-2013年不同棉花(Gossypium hirsutum L.)品种不同开花时间成铃的棉铃性状和纤维品质时间分布特征进行了比较分析.结果表明,油后移栽棉8月15-25日开的花成铃率高、铃重重、衣分高,不孕子率低;平均绒长28 mm左右、比强度26 cN/tex左右,马克隆值5左右,纺纱均匀性指数130左右,纤维品质综合表现较优,适宜纺织中支纱.