色季拉山三种优势灌木对重金属的富集特征及修复潜力研究OA

This study investigated the heavy metal accumulation characteristics and phytoremediation potential of 3 dominant shrub species(Lonicera tangutica,Rosa omeiensis,and Berberis johannis)in Sejila Mountain of Xizang.Through analysis of Cd,Cr,Cu,Pb,Zn,and Hg concentrations in leaves and fine roots,combined with bioaccumulation factor(BCF),translocation factor(TF),and membership function analysis,we systematically evaluated their heavy metal accumulation patterns and ecological remediation potential.Results demonstrated:(1)Heavy metal concentrations in the three shrubs generally exhibited a leaf>fine root distribution pattern,with the overall content order Zn>Cr>Cu>Pb>Cd>Hg;(2)L.tangutica showed the strongest enrichment capacity for all heavy metals except Cu,with particularly prominent translocation ability for Cd,Cr,Zn,and Hg;(3)R.omeiensis displayed specific translocation advantages for Cu and Pb;(4)Membership function analysis revealed the comprehensive translocation capacity followed the order:B.johannis>R.omeiensis>L.tangutica.The study identified significant species-specific,organ-selective,and element-dependent characteristics in heavy metal accumulation and translocation,with leaves playing a dominant role in metal uptake.Notably,while L.tangutica exhibited optimal single-metal translocation capacity,B.johannis demonstrated more balanced multi-metal translocation performance,showing no significant correlation between single-metal and comprehensive translocation capacities.These findings confirm the hyperaccumulation potential of these shrubs for specific heavy metals,providing valuable germplasm resources and theoretical support for phytoremediation of contaminated soils in plateau regions.