• 关键词：酸雾  马尾松  颗粒物

• 基金项目：

• 杜晓明
• 中国环境科学研究院生态所, 北京

• 刘厚田
• 中国环境科学研究院生态所, 北京

• 邢冠华
• 中国环境科学研究院生态所, 北京

• 摘要：通过对重庆南山四个样点的雾水分析表明,雾水的pH值为3.6—5.6,平均为4.5。离子成分以SO₄^2-,Ca²⁺和NH₄⁺为主,其总浓度为同期雨水的9.3倍。雾水中还有大量的颗粒物。凝结于针叶上的雾水pH值普遍下降,可达3.0以下。酸雾对马尾松针叶中的Ca²⁺,Mg²⁺,NO₃^-等营养离子有淋失作用,对叶中叶绿

• Abstract：The characieristics of fog water and its effects on masson pine in Nanshan mountains, Chongqing were studied.The results of fog water analysis showed that it was sulfur acidic fog with an average pH value of 4.5(3.6-5.6).The major components of the fog water were SO₂-4, Ca²⁺and NH⁴⁺.The total ionic concentration was 9.3 times of that of the rain water at the same season.There was a large amount of particiulate-matter in the fog water.The pH value of the fog water condensed on the needles of pine decreased to 3.0 or below,indicating possibilities of le aching of Ca²⁺, Mg²⁺ and NO^3- ions from the needles and the effect on needle chlorophyll.The particulate matter in the fog water might affect the needle, photosynthesis by blocking up the stomas.

• Key words：acidic fog  pine  particulate matter

• 
  摘要点击次数： 1781 全文下载次数： 1939