公路绿化主要树种滞尘潜力模拟试验研究

Study on Dust-retention Capability of Afforestation Plants of Road Greening

利用绿化植物滞尘已成为缓解大气颗粒污染的最有效途径,选择具有代表性的常见公路绿化树种,通过对其叶片滞尘潜力的探讨研究,以期筛选出滞尘能力强的植物,为公路交通环境的改善提供理论依据。结果表明,不同植物的滞尘潜力差异显著,阔叶乔木中二球悬铃木、杨树、国槐叶片的滞尘潜力最大,分别为6.495 9 g/m2,5.736 8 g/m2,4.791 9 g/m2;常绿乔木中,侧柏是较好的滞尘树种,最大滞尘量为7.568 8 g/m2;灌木植物以忍冬叶片的滞尘能力最强,其次为紫丁香及卫矛,最大滞尘量分别为7.084 7 g/m2,6.062 5 g/m2,5.878 9 g/m2.

The utilization of afforestation plants has been becoming one of the most effective ways to mitigate atmospheric particulate pollution.This article chooses representative common afforestation plants as subjects,discusses the dust-retention capability of their leaves to find out the tree species that have strong dust-retention capacity for roadside tree-belt,and provides a theoretical basis for road ambient environment improving.The results show that the dust-retention capability exist difference among tree species.In broad-leaved trees,the leaves of Platanus acerifolia,Populus and Sophora japonica had the greatest dust-retention capability with the maximal dust-retention quantity of 6.50 g/m2,5.74 g/m2 and 4.80 g/m2,respectively.Platycladus orientalis was the best dust-retention species of evergreen tree,with the maximal dust-retention quantity of 7.57g/kg.In shrubs,Lonicera japonica Thunb had the greatest dust-retention capability,followed successively by Syringa oblata and Euonymus kiautshovicus Loe with the maximal dust-retention quantity of 7.08 g/m2,6.06 g/m2 and 5.88 g/m2,respectively.