怎样防治有害气体对植物的危害?
①对花木合理增加施肥,可提高其抗有害气体的能力,并可促使受伤植物加快恢复生长。例如对受二氧化硫危害的El本三针松,施氮、磷、钾肥,可减轻其受害程度。钾肥施用合理,能加强,对烟害的抵抗力。氮肥不要施用过多,以免造成徒长,加重受害程度。
②经常用水冲洗叶片,以减少植物对氟化氢的吸收。在叶片受害后用水冲洗,可减少已吸收氟化氢的74%~94%。
③经常用石灰乳、碳酸钡或碳酸钙的混合液喷洒叶片,可防止或减轻烟害。
④加强养护管理。一般管理不好的花木,常易受到有害气体的侵害,造成叶片枯萎脱落.严重者可致死亡。对花卉加强养护管理,则生长健壮,可增强对有害气体的抵抗力。
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