百棉2号产量构成因素分析及高产探讨

为了更进一步探讨百棉2号新品种产量构成因素之间此长彼消的变化规律，以便明确其高产主攻目标。根据2002-2004年河南棉花区试及生产试验百棉2号的资料，特对百棉2号产量构成因素667m2的总铃数、单铃重、衣分进行了偏相关及通径分析。统计分析结果表明：总铃数对产量的贡献最大，衣分次之，铃重最小。因此，在大面积推广百棉2号的生产实践中，百棉2号高产途径和主攻目标是：主攻铃数、争铃重、稳定衣分及适宜的种植密度。

The Study on high Yield and Analysis on Yield Components in Baimian 2

Lint yield was composed of three important factors of the number of cotton bolls per 667m2, boll weight and ginning outturn. According to 2002-2004 year Henna area experiment and production experiment results of Baimian 2, The statistics yield components in Baimian 2 were carried out, The contribution of the number of cotton bolls per 667 m2 is biggest among all the yield components, the contribution of ginning outturn is less than that of the number of cotton bolls per 667m2, The contribution of the weight per cotton boll is least. The analysis of partial correlation showed that there were two negative correlation between the number of cotton bolls per 667 m2 and boll weight and ginning outturn. among the two negative correlation, the coefficient of partial correlation r13.2y=-0.8196** was extreme significance. In environment factor cultivated practice, The high yield can be attained by high numbers of cotton bolls per plant, high ginning outturn and stable weight of cotton bolls and optimum density, the optimum density is 8.25×104–9.0×104 plants/hm2.