米兰花为什么不开花
米兰花为什么不开花,米兰又叫米仔兰或树兰,开黄色似小米粒的花,香味浓郁,为人们所喜爱。米兰的香味虽比不上兰花的清雅,但比起夜来香等也自当胜过一筹。
种植米兰主要欣赏它的芳香。在种植米兰时,常常会遇上枝叶繁茂而不开花的现象,或者眼看米粒似的花蕾不开自落,甚至花开了也缺乏香味,这是为什么呢?

米兰原产于我国的广东、广西、台湾及东南亚一带,喜欢比较湿润温暖的气候。因此,在最初培养时必须满足温暖湿润的条件,不可在阳光下曝晒,浇水要适中,多施些氮肥如尿素,供植株营养生长,待植株已长成后则应多施磷肥如过磷酸钙等,否则由营养生长(枝叶的生长)进入生殖(孕蕾开花)生长阶段,由于缺乏促使开花的养分就不会形成花蕾。花蕾出现后,要继续提供磷肥,浇水不宜过多,水分过多是引起落花的原因之一。
有时候过于干燥又将造成叶片卷缩干枯甚至脱落,对于开花不利,要根据气候浇水。当温度高时,空气流动快,蒸发也快,盆土易干可多浇水,或在叶面、地面喷水增加湿度。盆内水分过多时,易引起根部腐烂。如果满足了开花的条件,即充足的肥料,潮湿的环境,它将不断地在新枝上出现黄色小花,否则即使开出少量花,其香味也不明显。
如果肥水等都没问题而不开花,就必须仔细检查叶背、枝条上有无不见移动的褐色小点,这些似乎是不吃不动的褐色小点(介壳虫),附着于叶片或枝干上不断吸吮植物体内的营养。时间长了,叶子会不断脱落,甚至一枝枝枯死,直至全株死亡。碰到这种情况,应该在盆土上铺纸,用小牙刷一一刷掉虫体,然后将纸烧掉。能喷药杀死它的药剂,一般都是剧毒性的药剂。一般惜况下不宜选用,也无法从花店或农药店购到,以上就是关于米兰花为什么不开花的介绍。
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