对郑州铁路局管辖范围内陇海线、京广线典型绿化植物大叶女贞、侧柏、石楠等的叶片滞尘量,及其植被带内的PM10、PM2.5与空气负离子浓度进行了测定.结果表明:铁路绿化带植被具有滞尘、降低其植被带内空气中的PM10与PM2.5浓度、提高负离子的正效应;常绿树种石楠、女贞的滞尘量较大,侧柏的滞尘量较小;但各植被带内空气中的PM10、PM2.5以及负离子浓度多无显著性差异.认为在保证行车安全的前提下,根据具体情况选择不同植物进行绿化设计与建设,可达到环境改善的目标.%Beside the Lanzhou-Lianyungang Railway and the Beijing-Guangzhou Railway under the jurisdiction of Zhengzhou Railway Bureau,some typical greenery plant of Ligustrum compactum,Platycladus orientalis and Photinia×fraseri are selected to determine its foliar dust detention and its vegetation zone of PM 10,PM2.5 and negative air ion concentration.The results show that;the railway greening vegetation has the positive effect to reduce the dust,PM10 and PM2.5 concentration and increase the negative air ions concentration.We find the evergreen species of Photinia ×fraseri and Ligustrum compactum have a higher foliar dust detention,while the Platycladus orientalis is smaller,but the PM10,PM2.5 and negative air ion concentration have no significant difference among most vegetation zone.It is believed that under the premise of ensuring the driving safety,selecting different plants for greening design and construction according to specific conditions can achieve the goal of environmental improvement.
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