百棉3号丰产稳产性及产量构成因素探讨

Yield and Yield Components of Hybrid Cotton Baimian No.3

采用偏相关、变异系数、多元线性回归及通径分析方法,对杂交棉百棉3号新品种进行统计分析。结果表明,该品种为丰产、稳产、适应性强、增产潜力大的杂交棉新品种。产量构成因素中,对皮棉产量的贡献率,以衣分最大,株数次之,铃重居第三位,密度最小。其高产途径为在合理提高密度的基础上,力争株铃数,稳铃重,促衣分。

According to the results of the cotton area experiment and production experiment in Henan in 2003-2005 year, the yield components of Baimian No.3 were analyzed by statistics method. The contribution of ginning outturn was biggest among all the yield components, the contribution of cotton number of plant was less than that of ginning outturn, the weight per cotton boll was the third and the contribution of density was least. The analysis of partial correlation showed that there were three negative correlations among the number of cotton bolls per plant, boll weight, density and ginning outturn. Among the three negative correlation, the coefficient of partial correlation r14.23=-0.580 was significant. The path analysis and the multivariate analysis showed that the high yield could be attained under optimum density, high numbers of cotton bolls per plant, high ginning outturn and stable weight per cotton bolls.