【摘要】 研究了太原市空气中SO2浓度的年际、月份和垂直变化规律.实验结果表明,夏季和秋季SO2浓度低,污染较轻,春季和冬季的SO2浓度大,污染重,沿垂直方向在1 m高处的SO2浓度最大,7 m高的位置SO2浓度明显降低,20m处更低.测试了银杏、白蜡和国槐3种绿化树种的枝条韧皮部和叶片的含硫量,其逐月变化规律说明这些树种对城市空气中的SO2具有很强的吸收能力,是城市绿化和净化污染的优良树种.结合树木的叶片容量和含硫量的关系,评价了它们净化污染的效益,结合SO2垂直变化规律提出立体绿化配置.图2表3参7更多还原

【Abstract】 The concentration variance of SO2 in air in different years, months and different vertical heights was studied in the area of Taiyuan, Shanxi. The results showed that the concentration of SO2 was less in air in summer and autumn than that in spring and winter. In three different vertical heights, the greatest concentration of SO2 appeared at the height of 1 m, while it decreased obviously at the height of 7 m, and even less at 20 m. The sulphur contents were monthly determined from the leaves and branch bark of three trees, Ginkgo biloba L. , Fraxinus chinensis Roxb. and Sophora japonica L. The results indicated that these trees could greatly absorb the SO2 from polluted air by their leaves and branches. Therefore, they are good for making city green and air clear. Based on changes of the SO2 concentration in vertical direction, the stereo-typed mode of growing plants is suggested. Fig 2, Tab 3 , Ref 7更多还原