以许昌市东城区为例，对比分析了石楠、大叶黄杨、海桐、小叶黄杨、火棘、小叶女贞6种道路绿化植物的滞尘能力.研究结果表明，石楠的滞尘量最大，为6．42 g/m2，小叶黄杨滞尘量最小，仅1．51 g/m2.就绿化带内、外两侧滞尘量而言，内侧的叶片平均滞尘量明显大于外侧；其中，石楠的内外两侧滞尘量差异最大，内侧滞尘量为5．47 g/m2，外侧滞尘量为4．24 g/m2，两者相差达1．23 g/m2；小叶黄杨的滞尘量差异最小，内侧滞尘量为0．86 g/m2，外侧滞尘量为0．79 g/m2，两者相差仅0．07 g/m2.6种树种滞尘量的空间分布均表现为下部＞中部＞上部.%Taking Xuchang Eastern District as example,the dust-retention of 6 greenbelts,Photinia serrulata, Buxus megistophylla,Pittosporum tobira,Sabina chinensis,Pyracantha fortuneana,Ligustrum quihoui,was examined. The results show that the highest dust-retention capacity of 6.42 g/m2 was recorded in Photinia serrulata,while the lowest 1.51 g/m2 in Sabina chinensis. As for the difference of the greenbelts inside and outside,the dust-retention capacity of 6 species indicated an order of inside>outside. The most difference of 1.23 g/m2 was recorded in Photinia serrulata,contrasted to the smallest difference of 0.07 g/m2 in Sabina chinensis. Moreover,the spatial distribution of dust-retention suggested an order of lower section>middle section>upper section.
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