落果如何防止?
落果如何防止?观果类花木出现落果的主要原因是养分供应不充足,而造成养分不能充足供应的原因主要有以下几方面:
(1)光照:光照不充足或光照过强都使叶片的光合效率下降,植物光合作用制造的养分不能满足果实生长的需要,从而造成落果。
(2)温度:挂果时环境温度过高或过低,都不利于植物的生长,从而影响到养分的供应而造成落果。另外,温差过大也会造成花卉生长的不适应,使植株形成的营养供应减少,从而引起落果。
(3)肥料:施肥时肥料的浓度过高,易造成烧根,引起果实营养供应的中断,造成落果。肥料不足时,果实不能获得充足的养分,也易引起落果。
(4)水分:盆土干旱或土壤浇水过多时,会造成植株根系受损,使根系的吸收能力下降,造成植株体内水肥供应量的减少,不能满足果实生长的需要,造成落果。花卉坐果后也不能使土壤积水,阴雨天应防止雨淋,避免落果。
(5)果实数量:观果类花木在结果的初期要注意把过多的果实疏去一些,否则会因为果实的数量过多,造成养分的供应不足而出现“饥饿”性落果。
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