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利用~(14)CO_2标记向日葵花蕾膨大、盛花、完熟三个生育期的不同叶位叶片,研究向日葵叶片功能。结果表明:花蕾膨大期倒5叶以下光合产物36%保留在叶片,输出64%,其中,花盘、苞叶占72.9%,花盘上的外部籽粒(仁、皮)占18.1%,内部籽粒占9.0%。盛花期标记倒1—5叶片,光合产物输出70.9—83.5%,倒1—3叶输出81.5—83.5%,以倒2叶对籽粒贡献最大。完熟期标记倒1—3叶,光合产物输出11.21—29.13%,主要输往籽仁,尤以灌浆时的花盘中心部位籽仁为主。倒2叶输出量亦最高,对产量的形成有重要作用。
The leaf function of sunflower was studied by using (14) CO_2 to mark different leaf positions of sunflower flower buds, blooming and ripening. The results showed that 36% of the photosynthate under the inverted 5-leaf stage remained in the leaves with an output of 64%, of which 72.9% were found on the faceplate, 18.1% were on the faceplate, and 9.0% %. Florescence flag down 1-5 leaves, photosynthate output 70.9-83.5%, inverted 1-3 leaf output 81.5-83.5%, to 2 leaves the largest contribution to the grain. Flag ripening down 1-3 leaves, photosynthetic output 11.21-29.13%, mainly lost to the seed kernel, especially when grouting center of the face plate of the main dish. The output of the second leaf is also the highest output, the formation of an important role.