钙对酸雨伤害甜瓜幼苗的影响

EFFECT OF CALCICUM ON MUSKMELON SEEDLING HARMED BY ACID RAIN

本文研究了钙对酸雨伤害甜瓜幼苗的影响。３０ｍｍｏｌ／ＬＣａＣｌ２处理甜瓜幼苗２次，可明显减轻ｐＨ２．５酸雨对甜瓜幼苗的酸致损伤。实验结果显示，此与钙能提高甜瓜幼苗光合速率、叶绿素含量，增加ＣＡＴ活性与叶片Ｃａ２＋含量，减少ＭＤＡ含量，降低质膜透性，维持细胞汁ｐＨ值稳定性等多重生理生态效应有关。

The protective effect of calcium on muskmelon seedling harmed by acid rain was studied. When muskmelon seedlings were sprayed with 30 mmol/L CaCl 2 two times(once every 24h),the damage to muskmelon seedlings by acid rain at pH2 5 were reduced. The protective effect was because that CaCl 2 raised photosynthetic rate, chlorophyll content and Ca 2+ content, increased catalase activity, decreased malondialdehyde content, reduced cell membrane permeability and kept stability of cell juice pH value of muskmelon seedlings, etc .