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杜鹃花不开花

司平松
2017-05-22
有花友遇到#杜鹃花 不开花的情况,百思不得其解,好肥好水伺候,为什么不开花呢?对于植物来说并不是好肥好水就可以让其达到最佳状态,本文整理了一些有关杜鹃花不开花的原因,供花友参考:



第一个原因,就是肥水过大,导致杜鹃只长叶子不开花,可以理解为营养过剩,出现新枝勃发却不开花的现象。我们可以通过人为方法干扰其营养生长过盛,使生殖生长得到加强而促进开花。花前不施含氮的肥料,只增施磷、钾肥,调节体内磷氮比,避免营养生长过盛,促进花芽分化。剪去徒长枝及内膛枝,对发有四五个新芽的枝条,要搞除两三个,使树冠内部枝叶减少,阳光增多,碳水同化作用得到促进而使生殖生长增强。翌年春,控制浇水,做到盆土湿润,盆面偏干。深秋推迟人室越冬的时间,在没有浓霜或急剧降温的情况下,尽可能放在室外,控制荫发新枝,有利开花。



第二个原因,花苞变叶片,杜鹃花的花苞形成时,先进行花芽分化阶段,在这一阶段必须增加以磷为主的肥料,不然花苞长出时,看起来像花苞,其实是叶芽。因为花苞被包藏在叶芽之内,当磷肥不足时,包藏在叶芽内的花苞就无法形成。因此待次年放叶时,见不到花苞,也就造成花苞变成叶片的误解。
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