蟹爪兰落蕾的原因?
蟹爪兰在冬季常出现落蕾的现象,主要是在以下几个方面要注意:
(1)温度不适:蟹爪兰孕蕾期间的温度为10~18℃,低于10℃时,对其生长不利。北方莳养蟹爪兰,多半将其置于向南阳台上,但夜间温度有时会偏低,对蟹爪兰及其嫁接砧木产生不良影响。尤其用三棱箭作砧木的种类,因三棱箭更不耐寒,往往会造成落蕾。
(2)光照不足:蟹爪兰现蕾时间为10月下旬,此时在北方温度较低,人们往往会将其从室外移人室内,而室内往往光照不足,因此易导致营养不良而落蕾。
(3)浇水不当:冬季光照弱,温度低,水分蒸发慢,因而不必天天浇水,干后再浇即可(平均4~7日浇水一次),同时要求水温与环境温度相当,浇水偏多偏少都会因干旱或水涝而致落蕾。浇水尤其是向植株喷水时水温太低,与环境温度相差太大,也会引起花蕾大量脱落。
(4)施肥不当:蟹爪兰现蕾后,应及时增施磷钾肥,即每隔7~10天向盆内喷施或叶面喷施0.2%的磷酸二氢钾水溶液。否则,会因磷、钾肥不足而落蕾。同时施肥也不宜过急过猛,肥料过浓也会使蟹爪兰落蕾,以上就是关于蟹爪兰落蕾的原因的介绍。
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