徐州市主要落叶绿化树种滞尘能力比较与分析

为了筛选出具有强滞尘能力的树种作为徐州市主要绿化树种，选择徐州市具有代表性的3个地区作为工业区、交通干道和清洁区，对3个样地6种主要落叶绿化树种的滞尘能力进行了研究。结果表明：（1）同一地区不同树种间的滞尘能力存在显著性差异，在显著性水平为0.05时，显著性P值均小于等于0.001；（2）在外界尘源条件相同的情况下，6种树种的滞尘能力强弱依次为：紫薇>法国梧桐>枫杨>毛白杨>构树>意大利杨；（3）绿化树种的滞尘能力与叶表面特征密切相关。在徐州市用于消减大气颗粒物的落叶树种选择上，应优先考虑紫薇、法国梧桐和枫杨。

Comparison and Analysis on Dust-retention Ability of Major Deciduous Greening Species in Xuzhou

In order to filter out the main urban greening tree which has the strong dust-retention ability, the dust-retention ability of 6 major deciduous greening trees at 3 representative regions, including industrial area, main traffic artery and clean area in Xuzhou were studied. The results showed that： （1） different deciduous greening trees had distinctly different dust detaining abilities when in the same dust environment region： α=0.05, P≤0.001; （2） Under the same dust condition, the descending order of dust-retention ability in 6 deciduous greening trees was as follows： Lagerstroemia indicaPlatanus×acerifoliaPterocarya stenoptera C Populus tomentosa CarrBroussonetia papyriferaPopulus euramevicana cv; （3） The dust-retention ability of deciduous greening trees was closely related to the surface characteristics of leaves. Lagerstroemia indica, Platanus × acerifolia and Pterocarya stenoptera C should be given prior consideration in the choice of the deciduous tree species in Xuzhou for reducing the atmospheric particles.