Effects of Traffic Pollution on Leaf Morphological and Physiological Indexes of Greening Trees in Yinchuan
Using 10 greening tree species as materials, the leaf area, leaf water content, specific leaf area and chlorophyll content(Soil and plant analyzer development) were measured to study the effects of traffic pollution on leaf morphological indexes and physiological indexes of greening trees in Yinchuan city.The results showed that with the increasing of pollution level,the leaf morphological indexes and physiological indexes of Sophora japonica L.,Ailanthus altissima Swingle,Populus hopeiensis Hu et Chow.changed slightly,showing strong resistance to traffic pollution;meanwhile,the indexes of Caryopteris ×clandonensis cv.Worcester Gold,Rosa xanthina Lindl changed obviously,showing poor resistance.
The paper analyzes the influ-ence of form of transport upon the form of city roads, city space and city image, and proposed some problems we should pay attention to in urban planning and design when personal cars are increasing.