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绿化树种在截留沙尘、降低大气颗粒污染物浓度、改善城市生态环境等方面发挥着不可替代的作用。该文选取新疆南部典型绿洲城市——阿克苏市不同功能区的绿化树种,用多重比较法对比分析了二球悬铃木(Platanus×acerifolia)、新疆杨(Populus alba var.pyramidalis)、圆冠榆(Ulmus densa)、天山梣(Fraxinus sogdiana)和垂柳(Salix babylonica)5个树种叶片平均滞尘量随时间变化及不同高度叶片的滞尘能力,探讨了阿克苏市主要绿化树种的滞尘规律,得出以下结论:不同绿化树种单位叶面积滞尘量差异显著,差距在1.15–2.17倍之间,绿化树种滞尘量随着时间延长而增加;同一树种在城市不同功能区的滞尘能力不同:工业区>交通枢纽区>居民区>清洁区;不同高度的叶片,其滞尘量在工业区和交通枢纽区差异显著:高度1 m的叶片滞尘量>高度2 m的叶片滞尘量>高度4 m的叶片滞尘量。
Green tree species play an irreplaceable role in interception of sand dust, reducing the concentration of atmospheric particulate pollutants and improving the urban ecological environment. In this paper, the greening tree species in different functional areas of Aksu City, a typical oasis city in southern Xinjiang, were selected for comparison. Platanus × acerifolia, Populus alba var. Pyramidalis, Ulmus densa, Fraxinus sogdiana and Salix babylonica, the dust-holding capacity of the main afforestation species in Aksu was discussed, and the following results were obtained CONCLUSION: The difference of dust-holding capacity per leaf area of different greening tree species is significant, with a difference of 1.15-2.17 times. The dust-holding capacity of greening tree species increases with time. The dust-holding capacity of the same tree species in different functional areas of the city is different: > Transport hub> residential area> clean area; different height of the blade, the amount of dust in the industrial zone and transport hub significant difference: 1 m height of the leaf dust dust> 2 m height of the leaf dust Dust> height 4 m of the amount of dust leaves.