冬天花友对兰花做了这件事,不仅安全过冬了,还逆势生长发芽
常听兰友说,冬季兰花休眠期。其实兰花冬季并不完全休眠,即使在气温较低时,兰花生殖生长缓慢,冬季的兰花花苞还在长大,兰苗生长也没有完全停止。只是不容易被人们觉察而已。有花友在冬天尝试对兰花进行加温,结果不仅让兰花安全过冬了还促使了兰花生长发芽。
加温是从初冬开始。如天气晴好,兰房中的温度18℃以上不用加温;仅在阴雨或风霜的天气,兰房温度慢慢地下降时加光照和加温,使兰房内温度保持在18℃以上,但在夜间保持8℃即可。昼夜温差大,有利其生长。春节过后要有充分的光、温、水,使兰苗提前进入生长期,还要加施叶面肥和杀菌。
这几年花友冬天的加温试验证明,新芽比原来提早萌发40天左右出土,简直是逆势生长。过一季度兰花就可成苗了,在5月份第二次新芽又出土,因而取得一年长两三次的新苗效果,但是冬季加温仅在寒冷阴雨天气,切不可不间断地加温,以致无日夜的温差。
加温一定要把握适度,否则会事与愿违。在加温期间,要开微风扇循环回风。不要让兰苗受闷。切记冬季给兰花加温的主要目的不在于防冻,而是延长兰株营养生长期,所以注意温度也不宜加太高,超过其生长的温度则有害无益。
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