中文摘要：

本实验对武汉市城区主干道主要绿化树种的滞尘效应与叶表面结构进行了研究。结果表明：（1）同一尘源条件下,不同树种的滞尘能力差异显著。乔木中悬铃木滞尘能力较高,可达6.9345 g/m^2;小乔木中紫薇和紫叶李是滞尘能力较高的树种,滞尘能力分别为1.9543 g/m^2和1.8790 g/m^2;灌木中红花檵木和杜鹃等有较强的滞尘能力,分别可达4.0373 g/m^2和3.8875 g/m^2;（2）利用扫描电镜观察叶表面结构发现：叶表具毛被、褶皱、较深的不规则网格等特征的树种滞尘能力较高,叶表平滑或叶表网格结构规则且较浅时滞尘能力较低;（3）同一树种在不同的尘源条件下滞尘能力差异显著,空气中颗粒物浓度越高,滞尘能力也越大。以车流量近似模拟尘源条件表明,滞尘能力与车流量呈正相关。

英文摘要：

The dust detaining effect and leaf surface structures of major urban greening trees in the main roads of Wuhan were studied. The results showed that ： （ 1 ） Different greening trees have distinctly different dust detaining abilities when in the same dust environment. Platanus x acerifolia shows better dust detaining ability than the other arbor species, which can reach 6. 9345 g/m^2. Within all short arbor species, Lagerstroemia indica and Prunus cerasifera f. atropurpurea are better species with high dust detaining ability, witch can reach 1. 9543 g/m^2 and 1. 8790 g/m^2 respectively; Loropetalum chinense vat. rubrum and Rhododendron simsii have better dust detaining ability than the other frutex species, which can reach 4. 0373 g/m^2 and 3. 8875 g/m^2. （2） The SEM analysis of the leaf surface of selected greening tree samples showed that compared to the smooth surface or surface with shallow and inerratic reseau structure, the epidermis of leaf with the character of trichome or drape is propitious to detain the dust. And when the leaf epidermis has the character of reseau structure, the deeper and more ataetic the reseau is, the greater dust detaining ability will be. （3） The same species showed different dust detaining abilities when in different dust environments. The higher the dust concentration in the air is, the greater dust detaining ability will be. When using vehicle flux to simulate the dust environment, the dust detaining ability has a positive correlation with the vehicle flux.