苏州高速公路绿化滞尘效果初探

以苏州绕城高速公路为研究对象,研究了苏州高速公路空气中TSP的时间及垂直梯度变化规律,实测了苏州高速公路绿化净化粉尘污染的效果,研究了苏州高速公路绿化常用植物的粉尘净化效果,分析不同植物之间的净化吸收差异,结果表明:单位绿化面积滞尘效果乔木中以广玉兰最好,每周为13.7 g.m-2,是效果较差的深山含笑的2.8倍,灌木中以夹竹桃最强,每周达到11 g.m-2,是滞尘效果较差的紫薇的6.1倍;总体滞尘效果乔木>小乔木、灌木>地被。根据TSP的变化规律与苏州高速公路绿化滞尘现状,提出可以显著提高滞尘效果的绿化设计建议。

Study on dust-blocking effect of Suzhou Highway greening

Based on Suzhou Highway around the city,the air TSP's time and vertical changing regularity,the greening's purifying effect on dust pollution,the common plants' purifying effect on dust in Suzhou Highway greening,and the purifying and absorbing differences among different plants were studied in this paper.The results showed in the same greening area,Magnolia grandiflora had the best dust-blocking effect among all arbors,with 13.7 g·m~(-2) per week,which was 2.8 times as much as Michelia maudiae's.Nerium indicum had the best effect among all shrubs,with 11 g·m~(-2) per week,which was 6.1 times as much as Lagerstro miandica's.In conclusion,the order of dust-blocking effect are as follows: tall arbor>short arbor or shrub>vegetation.According to the TSP's changing regularity and the present dust-blocking situation in Suzhou Highway greening,this paper gives some greening design advices,which can obviously improve dust-blocking effect.