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为什么玉兰花先开花后长叶
更新时间: 2020-09-22 00:00:00  

玉兰先开花后长叶重要是开花跟长叶所需要的环境温度不一样。

玉兰的花芽和叶芽、枝芽是离开成长的,花芽大,生于枝的顶端,在冬天就能够在树枝上看到。玉兰在冬季处于休眠状况,但到了春天,气象略微转暖,因为花芽开放所须要的环境温度比叶芽萌生所需的温度要低,所以玉兰就先开花了。

关键词: 为什么 玉兰花 开花

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