问:我养了一盆白兰,一到立冬移入室内就不断落叶,我看土壤不干不湿,无虫害,室内通风较好,温度10℃左右,无光照但室内比较明亮,不知落叶原因在哪儿? 徐州孙晓红答:从你反映的情况来看,温度(白兰冬天要求5～12℃)、土壤湿度和通风都不是引起落叶的原因。问题可能出在光照上。白兰冬天在室内应放在阳光充足 Q: I have raised a pot of white orchid, and I have been decapitating as I move into the house in winter. I think the soil is dry and free from insects. Indoor ventilation is good. The temperature is about 10 ℃. But there is no light but the interior is bright. Where? Xuzhou Sun Xiaohong A: From your point of view, the temperature (Prydola winter requirements 5 ~ 12 ℃), soil moisture and ventilation are not the cause of deciduous. The problem may be in light. Prynne winter indoors should be placed in sunny