峨嵋山冷杉衰亡与酸性降水关系的初步研究

本文报道了峨嵋山高海拔地区冷杉衰亡与酸性降水关系的调查和研究,内容包括酸性降水和气态污染物状况的观察,冷杉枝叶生长状况和针叶解剖,树干解剖和根系观察,冷杉冠层对酸性降水的反应及酸性降水在生态系统中的变化,土壤和冷杉的元素分析等方面,并就酸性降水对冷杉衰亡的影响进行了初步评价结果指出,峨嵋山高海拔地区的酸性降水污染严重,雨水的平均pH值为1.37,酸雨频率达85.1:雾水的pH值为1.62,酸雾频率达100 有可能对冷杉产生直接和间接影响

Preliminary Study on the Relationship Between Acid Precipitation and Fir Decline of High-Elevation in the Emei Mountain

his paper deals with the study on the relationship between acid precipitation and fir(Abies Emei)decline of high-elevation in the Emei Mountain. The present status of acid precipitation and gaseous pollutants, growth status of branches and leaves, effects of acid precipitation on nutrient cations leaching from fir canopies and pH changes of rain water in the ecosystem of fir stand, and measurements of the" elements of fir and its soil were involved. The influence of elevation on acid precipitation to fir decline was also discussed. The results showed that the acid precipitation was serious at high-elevation zone in the Emei Mountain. Average annual pH of the rain water was 4. 32. the frequency of acid rain was 85.4%; average annual pH of the cloud fog was 4.62, the frequency of acid fog was 100 %. These might result in direct and indirect effects on fir.