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采用化学分析方法测定了太原市不同区域国槐样本树１、２年生枝条韧皮部含硫量的变化。其结果显示，国槐对空气中硫污染物有很强的吸收富集作用，在车、人流高密度区，枝条含硫量最高；从市区中心向郊外延伸，污染物在枝条内含量呈递减趋势。这恰好反映了城市硫污染的变化特点。通过几个区域对比又看出，硫化物在城市污染以居民区和市中心区为高，且甚于工业区
The chemical analysis was used to determine the changes of sulfur content in the phloem of 1st and 2nd year branches of Sophora japonica sample trees in different regions of Taiyuan City. The results showed that Sophora japonica had a strong absorption and enrichment effect on the sulfur pollutants in the air. In the high-density areas of cars and people-runoff, the sulfur content of the branches was the highest. From the downtown area to the outskirts, the content of pollutants in the branches was Decreasing trend. This exactly reflects the changing characteristics of urban sulfur pollution. Through the comparison of several regions, we can see that the sulfide in the urban pollution is high in the residential area and the downtown area, more than the industrial area