怎样做好米兰冬春的“过渡”工作?
米兰在室内过冬后,到春天就可以移到室外养护。这时掌握好移到室外时问和做好移到室外的“过渡”工作是养好和养活米兰的关键,移到室外时间以4月上旬为好。从上海地区气候情况来看,3月份的气候还不稳定,时而出现忽冷忽热情况。
有的养花者在过了春节以后,认为天气已经转暖,就急于把米兰搬到室外,但往往会遇上冷空气影响或西北大风的侵袭,使米兰受冻害。开始时顶部嫩叶逐渐发焦,以后渐渐扩展到上端部分枝条枯焦,最后导致全株枯死,所以米兰在室内渡过冬天后,切忌过早地移到室外,以气温已基本稳定,霜冻一般不再出现时移至室外养护为好。同时,米兰在经过5个月的室内过冬以后,移至室外养护需要有一个过渡阶段,以逐渐适应外部环境。
一般在3月底至4月初,天气晴好的中午前后,把放在室内过冬的米兰搬到室外锻炼2~3小时,3~4天后可延长到4~5小时,约1周后,它基本上适应了室外环境就可以不再搬到室内,放在室外任其风吹雨淋了。如果把室内过冬的米兰一下子移到室外,环境突然改变,难以适应,必然妨碍其生长。
有的时候,在3月下旬,由于室内温度偏高,叶芽萌动,甚至长出新叶。在这种情况下,突然移到室外,若遇较强烈阳光照射,也会使嫩芽或嫩叶灼伤发焦,嫩枝也会枯黄,不但影响生长,严重的还会造成死亡。因此,室内过冬的米兰,还要求掌握好移到室外的时间,移至室外养护前一定要做好适应性锻炼,以利于生长。
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