小麦功能叶对产量及其构成因素的影响

Effect of Functional Leaf of Wheat on Yield and Yield Components

选用15个小麦品种,以‘石4185’为对照,研究小麦功能叶叶片性状与产量及其构成因素的关系。结果表明,旗叶的叶面积变幅最大,产量构成因素中产量的变异系数最大;旗叶叶面积与单位面积穗数、穗粒数、千粒重、产量存在显著或极显著正相关,旗叶、倒二叶、倒三叶长宽及叶面积均对产量及产量构成因素存在不同程度的正相关关系,旗叶、倒二叶、倒三叶长宽比例配置合理有利于提高冬小麦产量。

15 high yield wheat varieties were selected. Taking ‘Shi 4185＇ as control,the relationship between leaf traits and yield and its components of functional leaves in wheat was studied. The results showed that the variation of leaf area of flag leaf was the largest,and the variation coefficient of yield was the largest in the factor of yield components. There were significant or extremely significant correlation between flag leaf area and ear number per unit area,grain number per ear,1000 grain weight and yield,and the length,width and leaf area of top three leaves had positive correlation with yield and yield components. The proper proportion of the length and width of top three leaves provides a basis for the improvement of winter wheat yield.