一品红落叶的原因?
一品红落叶的原因,家庭栽培的一品红落叶的原因有:
①在植株受到胁迫时易形成离层而导致落叶现象的发生;②植株在弱光下,下部叶片易黄化脱落;③当根系受到伤害输水能力下降时,老叶易发生落叶;④病虫害侵染。
要防止一品红落叶须做到以下几点:
①一品红喜肥,生长期内需氮肥较多,氮肥不足,会使植株下部的叶片脱落。除上盆施用迟效肥外,在摘心后一个月内,每隔1周追施1次充分腐熟的饼肥水,宜清淡,忌浓度过大;入冬进室前施足1次腐熟的有机肥。
②一品红喜温暖,不耐寒,生长适温为15~20℃。入冬夜间室温保持在15℃以上,不得低于5℃,否则叶片容易脱落。
③夏季切忌强光直射,放置在通风良好的凉棚内养护,盆与盆之间保持30厘米距离为宜。地上经常洒水,增加棚内的空气湿度,可有效地控制高温、干燥而引起的植株落叶。
④一品红怕干也怕涝,如过干或遇烈日,会造成植株生理缺水,则叶片卷曲而大量落叶;盆土过湿,植株光合作用不能很好地进行,会因营养不良而落叶。夏季每日早晚各浇水一次,秋季每日上午10~11时浇水1次,冬季每隔7天在晴天的中午浇水1次,春季每隔2日浇水1次,以上就是关于一品红落叶的原因的介绍。
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