Magnetic Properties of Greening Tree Species and Their Indicating Functions for PM2.5 in the Coral City
PENG Shunlei
LI Peng
LI Shichun
LI Songtian
Abstract：In recent years,air pollution,especially caused by PM2.5 has become more and more serious.Magnetic properties of greening tree species have indicating function of PM2.5.This study measured magnetic indexes of 78 leaf samples of 19 domain greening tree trees in the different urban functional areas of Pingdingshan City,compared variation of the leaf magnetic indexes with the different greening tree species,and studied the correlation between PM2.5 concentrations and the leaf magnetic indexes.The results show that in the same urban function region,different tree species had significant variations in the leaf mass magnetization rate (LMMR) (p＜0.05).In the coal mine region where air pollution was serious,the leaf mass magnetization rates for all tree species were greater than any other regions.The tree species with the greatest value of LMMR was Magnolia grandiflora (67.30x10-9 m3/kg),and that with lowest value for LMMR was Platanus acerifolia (6.41x10-9 m3/kg).At the same region,these tree species including Magnolia grandiflora,Broussonetia papyrifera,Platycladus orientalis,Koelreuteria paniculata,Pinus tabulaeformis has greater values of LMMR than any other species,and had higher ability for purification air pollution.In the different urban function region,the same tree species showed the significant variance in the values of LMMR (p＜0.05).LMMRs of Platanus acerifolia,Magnolia grandiflora,and Populus,which were widely distributed in the five urban regions,were significantly regressed with the concentrations of PM2.5 (p＜0.05).This study suggested that the tree species with greater LMMR could be recommended to be planted for purification of air pollution.Moreover,LMMR of the widely distributed tree species in the five urban regions,such as Platanus acerifolia,Magnolia grandiflora,and Populus could be used to indicate and monitor the heterogeneity of the spatial distribution of PM2.5 in Pingdingshan City.
Keywords：coal cityurban functional areagreening tree speciesmagnetic susceptibilityPM2.5indicative function
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 38-42 )