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花与叶谁先生长

2011-06-25 21:41:01| 分类：植物天地 | 标签： |举报 |字号大中小订阅

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大多数树木是芽先发育成枝叶，然后开花; 桃树、杏树等却是“先开花、后长叶”;

那么，花与叶谁先生长?

树木的芽分为叶芽、花芽和混合芽三种。

叶芽只能发育成枝叶，花芽只能发育成花或花序，混合芽既能发育成枝叶、又能发育成花或花序。

不同的树木发芽的时间不一样，而且不同的芽谁先发育也不一样--桃树、杏树等的花芽发育在先，叶芽发育在后，所以“先开花、后长叶”。大多数树木则是叶芽先发育，花芽后发育，所以“先长叶子、后开花”。

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