广西植物2018，Vol.38Issue(6)：746-754,9.DOI:10.11931/guihaia.gxzw201708039
南京市香樟树皮重金属含量及分布特征
Heavy metal contents and distribution characteristics in barks of Cinnamomum camphora in Nanjing
摘要
Abstract
Heavy metals are easily enriched in fine particles of the atmosphere and enter the alveolar deposits of the hu-man body through the respiratory tract,and endanger human health.In recent years,atmospheric heavy metal pollution is gradually aroused people's attention.The direct exposure of barks to the air is an important transitional step for heavy metals to enter plants,accumulating pollutants over the long term.Five different urban areas in Nanjing(commercial area,cultural and educational area,industrial area,traffic area and scenic area) were chosen to study the distribution characteristics of the contents of Cr,Pb,Cu and Zn in different seasons,using barks of Cinnamomum camphora trees as research objects.The differences in the spatial distribution of different heavy metal contents in barks and foliar particles were also compared.The main conclusions of this study can be summed up as follows: Heavy metal pollution in commer-cial and industrial areas are more serious.Heavy metal contents in the barks of C.camphora trees in different functional areas of Nanjing have obvious spatial and temporal distribution characteristics.The contents of heavy metals in the barks of different functional areas follow the order of commercial area(CA)＞cultural and educational area (CEA)≈indus-trial area (IA)＞traffic area (TA)＞scenic area (SA).Heavy metal contents in the barks in different seasons follows the order of Autumn＞Winter＞Spring＞Summer.Contents of heavy metals in particulate matter of leaves were higher than those in barks.Contents of heavy metals in foliar particles in commercial area were the highest,and contents in sce-nic area are the lowest.Pearson correlation analysis showed that there was a significant correlation (P＜ 0.05) between Cr in the barks of C.camphora trees in industrial and cultural areas,and significant correlations between Cu and Zn,in-dicating that these two kinds of elements may have similar origins.Contents of Pb between industrial area and traffic area were in significant correlation (P＜ 0.01),mainly from traffic emissions.Plant monitoring can indicate and predict the level of heavy metal pollution in the atmosphere.It is a simple and practical monitoring tool that can reflect the pollution in the area and provide a scientific basis for the monitoring of urban ecological environment.关键词
树皮/重金属/香樟/叶面颗粒物/南京Key words
barks/heavy metal/Cinnamomum camphora/particulate matter/Nanjing分类
农业科技引用本文复制引用
余岑涔,王国祥,韩睿明,张银龙..南京市香樟树皮重金属含量及分布特征[J].广西植物,2018,38(6):746-754,9.基金项目
国家自然科学基金(41403064) （41403064）
江苏省高校自然科学基金重大项目(13KJA80002) （13KJA80002）
江苏省高校研究生科研创新计划项目(KYZZ150255) （KYZZ150255）
江苏高校优势学科建设工程项目(PAPD) （PAPD）
江苏省科技厅基础研究计划(自然科学基金)青年基金项目(BK20140922) Supported by the National Natural Science Foundation of China(41403064) （自然科学基金）
the Natural Science Foundation of Jiangsu Province,China(13KJA80002) （13KJA80002）
Research Innovation Program for College Graduates of Jiangsu Province,China(KYZZ150255) （KYZZ150255）
Con-struction of Advantageous Disciplines in Colleges and Universities of Jiangsu Province,China(PAPD) （PAPD）
Natural Science Foundation for Youth of Jiangsu Province,China(BK20140922) （BK20140922）
