源库调节对向日葵产量及其构成的影响

于向日葵初花期进行不同层位叶片减源和花盘疏库处理,研究源库调节对向日葵产量及其构成的影响。结果表明,与降低50%库容相比,去除50%叶源能够显著降低产量;不同叶源水平下,食用型向日葵的下部叶片、油用型向日葵中部叶片是限制产量的主要部位,能够显著影响叶片净光合速率、经济产量、生物产量、单盘粒数、单盘粒质量、百粒质量和结实率,是对产量贡献最大的功能叶片,向日葵属源限制型作物,源是限制产量的主要因素。

Influence on Yield and Yield Components of Sunflower by Source sink Regulation

In order to clear yield and yield componoents influence by source sink relationship, picking off buds and leaves of different position of sunflower leaves in the early of flowering stage. The results are as follows: compared with picking off 50% buds, yield reduced significantly after picking off 50% leaves. Under different leaves level, the lower leaves of edible sunflower and the middle leaves of oil sunflower were the main parts to limit yield which significantly influenced net photosynthetic rate, yield, biological yield, kernels per disk, kernels mass per disk, 100 kernels mass and kernal setting percentage, were the main function leaves to yield contribution at the same time. Sunflower was the source limitation crop, and source was the main factor to limit yield.