关键词: 烤烟;短日照;光周期;着生叶数

Abstract:

The effects of short day light conditions on the floral bud differentiation and growth of flue-cured tobacco with different seedling ages were studied with NC82 (Nicotiana Tabacum cv.) as material in this paper. The results showed that: ①the flowering time was earlier under short-day light condition than under control. This indicated that NC82 belong to short-day light plant; ②both the 6 h- and 8 h- short day light treatments could induce tobacco plants to premature flowering; ③the plant at 9-leaf stage and 13-leaf stage had the same ability to sense environmental signal; ④for the plants ranged from 9-leaf to 13-leaf stage, the earlier it received the signal, the earlier it transferred to floral bud differentiation and the less leaves it had. The method of photoperiod induction was expected to provide more references on inductive factors and the sensible period.

Key words: flue-cured tobacco, short day conditions, photo-periodism, leaf number