预防米兰花冬季掉叶子
预防米兰花冬季掉叶子,米兰株形优美,花期很长,但冬季易出现大量落叶。防止冬季落叶要防风寒,还要合理浇水施肥。冬季室温应保持在10~12℃,以米兰顶芽不萌动为宜。
温度过高,会萌发新叶,早春出室后易遭旱风吹打出现干梢,影响开花。冬季应放向阳及光线充足处,适当通风,但不可让冷风直吹,否则会大量落叶,室温不要低于5℃。停止施肥,控制浇水,保持盆土半墒状态,一般20天左右于晴天中午浇1次透水,常用与室温相近的清水喷洒叶片。如室温条件达不到10~12℃,可放在5~7℃的室内越冬,低于5℃则受冻。
如果出现落叶,可将植株从盆中磕出,剥掉主球外围1/3的土,剔除烂根,并剪去1/2枝条,重新栽培浇水,放在室温10℃以上的向阳处,罩上塑料袋,保持湿润,就会重新长出新枝条。冬季室内光照较差,光照不足,可人工补光。可用100~300W的白色荧光灯补充光照,一般应离开植株1米左右,每天增加3~4小时的光照,光照不足容易造成落叶,同样会影响来年的开花。
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