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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。
The economic characteristics such as boll weight, fiber length and fineness of cotton bolls were stable, and the economic traits such as boll weight and fiber strength of bolls varied greatly, and their longitudinal changes tended to middle> lower> upper, horizontal The change of the basal changes was gradual. For example, the boll weight of each bell bit changed in a descending order, the regression equation was y = 6.395-0.476x (r = -0.9961). Therefore, the improvement of the former economic traits mainly depend on the purification and replacement of elite species. In the cultivation process, attention should be paid to the regulation of the boll distribution of cotton plants and the improvement of the organic nutrition status at the boll sites or the improvement of the latter class of economic traits, Significance.