【摘要】 以“泗棉 3号”作为近期育成的棉花高产品种的典型代表 ,与不同时期、生态型和产量结构型的“苏棉5号”、“中棉所 12”进行比较 ,研究高产品种的产量构成特点 ,以期为棉花新品种的选育提供一些参考依据。结果显示 :高产棉花品种具有结铃性强 (结铃率可达 4 0 %以上 ) ;成铃时空分布合理 ,尤其是中上部结铃多 ;铃重中等 (4～4 .5g) ;衣分高 (4 0 %以上 ) ;经济系数 (包括单铃经济系数 )高和适应性广、补偿能力强等特点。这些特点有利于产量构成因子在较高产量水平上保持协调与平衡。更多还原

【Abstract】 In this experiment,“Simian 3”,a recently bred high yielding cotton variety was used as a typical representative to be compared with “Sumian 5” and “Zhongmiansuo 12” with different ecotype and yield constitution at different periods to study the characteristics of yield constitution of high yielding cotton varieties so as to offer some references for breeding new varieties.The main results were shown as follows:high yielding varieties were characterized by such characteristics as strong boll setting capability(boll setting rate may be over 40%),rational distribution of boll setting in space and time,especially with more bolls on the middle and upper part of the plant,medium boll weight(4～4 5 g),high lint percentage(over 40%),high economic coefficient(including the economic coefficient of individual boll),wide adaptation and high capability for compensation.These characteristics are all conducive to keeping yield constitution elements in collaboration and equilibrium on a high level.更多还原