峨嵋山金顶地区酸性云雾水对植物冠层的作用和影响

Interaction of acidic cloud droplet with and it's effects on forest canopy in the Jingding zone of the Mount Emei

本文研究了峨嵋山高海拔地区针叶、阔叶树冠层云雾水滴和云雾水滴酸度、化学成分及酸性云雾对植物的影响。 结果指出,与云雾水比较,针叶树冠层云雾酸度增加,而阔叶树冠层雾云滴则相反。说明针叶林冠层促进了云雾水酸化的作用,阔叶林冠层则对酸性云雾水有中和作用:在酸性云雾水作用下,针叶和阔叶林冠层能淋溶出大量营养离子。表明峨嵋山高海拔地区的酸性沉降,特别是酸性云雾水对冷杉针叶林构成潜在的危害。

This paper studies the chemical composition and acidity of cloud droplet and canopy waterdrops of coniferous and broad leaf, and deals with the effects of acidic cloud droplet on trees in high - elevation zone of the Mount Emei.The results indicate that the acidity of canopy waterdrops of coniferous trees increases as compared with the acidity of cloud droplets; in contrast , that of broad leaf trees decreases. These results demonstrate the canopy of coniferous trees promotes the acidification of the cloud droplet,while that of broad leaf trees gives rise to neutralization. There is a significant increase in the leaching of nutri- ent ions from both the canopy of coniferous and broad leaf trees under the actionof acidic cloud droplet, thus indicating that acid deposition, especially acidic cloud droplet, is potentially harmful to fir forest in the high - elevation zone of the Mount Emei.