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紫光膜能吸收和反射紫光，紫光能抑制蔬菜莖葉徒長。覆蓋紫光膜后，影響紫光進(jìn)入棚內(nèi)，能促使蔬菜枝葉繁茂，這樣對(duì)以食莖葉為主的蔬菜如韭菜、芹菜、生菜、菠菜、小白菜、茼蒿、油菜等，不僅能提高產(chǎn)量，還能提高品質(zhì)，有高...
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