白兰不开花的原因是什么?
白兰不开花的原因是什么,白兰花连养数年,只长叶子不开花的原因有以下几个方面:
一是营养生长过旺,影响其孕蕾开花;由于施肥时未注意氮、磷、钾的协调供应,致使氮素偏多,磷、钾素偏少,导致其枝叶旺盛生长,抑制了花芽的分化产生。可通过补充磷钾肥,缩剪过旺徒长枝条、针刺分枝、侧梢等方法。以达到抑制植株营养生长,促进其孕蕾开花的目的。
二是光照不足,通风不良。如果两边有高墙遮挡,再加上上方遮荫,这样会致使白兰植株缺乏应有的光照和通风条件,也会造成枝叶徒长,影响其孕蕾开花。在夏季最好将其搬放于四面通风仅顶部有遮荫的场所。
三是盆土板结、叶片黄化,影响植株的孕蕾开花。白兰为肉质须根,要求土壤通透良好,盆土呈酸性,为此要经常给盆花松土,并适当浇施矾肥水,调整盆土的酸碱度至最适于白兰花生长的范围内,一般pH值以5.5~6.5为宜。
另外,还可通过叶面喷施0.1%的磷酸二氢钾溶液,以喷水代浇水借以提高局部范围内相对空气湿度等手段,来满足白兰植株正常生长和孕蕾开花的需要。通过上述管理措施的完善,相信白兰花一定会开出较多较好的花朵。
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