Characteristics of the Sulfur Dioxide Content in the Atmosphere and the Sulfur Content in the Leaves of Main Greening Tree Species in Different Functional Areas of Urumqi
The sulfur dioxide content in the atmosphere and the sulfur content in the leaves of ten main greening tree species were measured in four functional areas,including industrial areas,traffic areas,residential areas,and park are-as of Urumqi.The differences between the sulfur dioxide content in the atmosphere and the sulfur content in the leaves of different functional areas were compared.The results showed as follows:the average sulfur dioxide con-tent in the atmosphere of Urumqi was 0.022 g·m-3 and that in park areas,residential areas,traffic areas,and indus-trial areas was 0.009 g·m-3,0.013 g·m-3,0.030 g·m-3,and 0.036 g·m-3,respectively;the sulfur content in the leaves of shrubs(2.91mg·g-1)was higher than arbors(2.47mg·g 1);the sulfur contents in leaves of ten tree spe-cies were in the following order:Ulmus pumila＞Robinia pseudoacacia＞Amygdalus triloba＞Gleditsia sinensis＞Amygdalus davidiana＞Crataegi pinnatifidae＞Prunus cerasifera f.atropurea＞Syringa reticulata var.amuren-sis＞Fraxinus chinensis＞Rhus typhina;the percentage differences among recreational areas,traffic areas,industrial areas and park areas were 17.8％-29.1％,27.2％-47.9％and 37.5％-222.1％,respectively,of which the smal-lest were Rhus typhina,Ulmus pumila and Gleditsia sinensis,and the largest were Crataegi pinnatifidae and Prunus cerasifera f.atropurea;the percentage differences among traffic areas,industrial areas and recreational areas were 10.1％-111.1％and 32.0％-149.7％,respectively,of which the smallest were Amygdalus davidiana and Gleditsia sinensis,and the largest was Crataegi pinnatifidae;the percentage differences between industrial areas and traffic areas were 5.5％-100.0％.The sulfur contents in the leaves of Gleditsia sinensis,Prunus cerasifera f.at-ropurea,Fraxinus chinensis,Rhus typhina,Amygdalus triloba,Syringa reticulata var.amurensis were significant-ly linearly correlated with the atmospheric sulfur dioxide content.
city forestatmospheric sulfur dioxide contentsulfur content in the leavesUrumqi
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