不同部位棉铃经济性状分析

棉株各铃位的衣分率、纤维长度和细度等经济性状较为稳定;而各铃位的铃重和纤维强度等经济性状变化较大,其纵向变化趋于中部>下部>上部,横向以离基递降变化,如各铃位的铃重呈离基递降规律变化,其回归方程为y=6.395-0.476x(r=-0.9961)。因此,改良前一类经济性状主要靠纯化和更换良种;而在栽培过程中,注意调节棉株成铃分布和改善铃位有机营养状况或纯化和更换良种对后一类经济性状的提高具有同样重要的意义。

Analysis of Economic Characters of Cotton Bolls in Different Positions of Cotton

This research was carried out in Jiangsu Agricultural College, The breed used in the research was deltapine 15. The result indicates: the economic characters, such as the ginning outturn, fiber length and fiber fineness are very stable; whereas the weight of holls and fiber strength are widely changeable. The economical value of the lower part lower than that of central section but high than that of upper in vertical. In horrizonal, they decrease gradually from the main stalk. For example, the weight of holls decrease with the increase of the distances to the main stalks. The linear regression equation is=6.395-0.476x(r=-0.9961~(**)). So, in order to improve the former economic characters, fine breeds must be used. In the process of cultivation. It is necessary to pay attention to regulate the distribution of bolls and improve the allocation of organic nutrients or use fine breeds so as to improve the economic characters of latters.