中国农学通报2025，Vol.41Issue(13)：19-25,7.
6种纯林结构对TSP、PM2.5消减作用以及PM2.5中重金属质量浓度的影响
Effects of Six Pure Forest Structures on Reducing TSP,PM2.5 and Characteristics of Heavy Metal Changes in PM2.5
摘要
Abstract
Landscape plants can intercept and retain atmospheric dust,which are important filters for purifying the city.In order to address the pollution issues of TSP and PM2.5,an experiment was taken using Rizhao Botanical Garden as the research object.Through the determination of the concentration of TSP and PM2.5 in the park and the survey of plant groups,it quantitatively analyzed the reduction effects of different plant groups on the concentration of TSP and PM2.5,the diurnal and seasonal changes of TSP and PM2.5 concentrations,the relationship between the changes of TSP and PM2.5 concentrations and the characteristics of plant communities,and the changes of heavy metals in PM2.5 under different populations.The results showed that:(1)the effect of plant population structure on the reduction of TSP and PM2.5 in different seasons was significantly different.However,the order was consistent as Weigela florida'Red Prince'>Ligustrum compactum>Platanus orientalis>Fraxinus pennsylvanica>Prunus lannesiana'Hatzakura'>grassland.In summer,the highest reduction rates of TSP and PM2.5 were 21.2%and 36.5%,respectively,in the pure forest of the W.florida'Red Prince'belt.(2)The diurnal variation of TSP and PM2.5 concentrations showed a"W"pattern,which gradually decreased from 8:00 to 16:00,then began to rise,reached a small peak at 20:00,then decreased,and gradually increased after 24:00.The seasonal variation rule was that the concentrations of TSP and PM2.5 were the lowest in summer and the highest in winter.(3)The concentrations of TSP and PM2.5 in summer were significantly positively correlated with tree canopy density,average height and planting density.(4)The total mass concentration of 12 heavy metals in summer was grassland(813.2 ng/m3)>pure forest of P.lannesiana'Hatzakura'(754.2 ng/m3)>F.pennsylvanica(724.5 ng/m3)>P.orientalis(658.9 ng/m3)>L.compactum(626.7 ng/m3)>W.florida'Red Prince'(587.2 ng/m3),the changes in heavy metal concentration and PM2.5 concentration were basically consistent.The mass concentration of Zn and Pb was the highest,and the mass concentration of Cd,Ni,V and Co was relatively low.The conclusion is that the W.florida'Red Prince'pure forest has a strong effect on reducing TSP and PM2.5,and the heavy metal content in PM2.5 is low.It can be used as an effective pure forest structure to improve urban air quality and reduce TSP and PM2.5 concentrations.关键词
植物群体/TSP/PM2.5/结构特征/季节/重金属/城市/削减率Key words
plant community/TSP/PM2.5/structural characteristic/season/heavy metals/city/reduction rate分类
农业科技引用本文复制引用
徐晓艳,李文彬,王蕾,孙丽..6种纯林结构对TSP、PM2.5消减作用以及PM2.5中重金属质量浓度的影响[J].中国农学通报,2025,41(13):19-25,7.基金项目
横向课题"城市绿地空气颗粒物密度及滞尘效果的测定"(660/2425005). （660/2425005）
