title: Spatial variations of Pb in the vertical zone of the soil-plant system in the Changbai Mountain National Nature Reserve.
abstract: The characteristics of vertical and horizontal variations of lead element(Pb) in soil-plant system of vertical zone in Changbai Mountain National Nature Reserve(CNNR) were studied. The results showed that Pb concentrations in soils of vertical zone are all above 25 mg/kg, and the average Pb concentration of each soil zone negatively correlates its degree of variation, i.e. brown coniferous forest soil zone has the lowest average Pb concentration of four soil zones, and the highest horizontal variation; however, mountain soddy forest soil has the highest average Pb concentration, and the lowest horizontal variation; the average concentration of plant Pb of each plant zone is lower than the worldwide average level of Pb in plant(Clarke), respectively, and plant Pb content order is consistent with soil Pb content order, but their horizontal variations are different from those in soil zones, the variation of mountain tundra forest zone is highest, but Betula ermanii forest zone the lowest. Vertical variation of plant Pb is obviously higher than that in soils with variation coefficient of 89.76%; the enrichment capability of plant for Pb is depended on the plant types and the different organs of plant; parent material and parent rock, pH values, soil organic matter and soil particle fraction etc. are the main factors influencing variations of Pb content in soil-plant system of vertical zone in CNNR.
authors.affiliation: Lab. for Wetland Process and Environment, Changchun Institute of Geography, Chinese Academy of Sciences, Changchun 130021, China. junhongbai@263.net
authors.forename: Jun-Hong
authors.initials: JH
authors.lastname: Bai
authors.forename: Wei
authors.initials: W
authors.lastname: Deng
authors.forename: Hua-Jun
authors.initials: HJ
authors.lastname: Fang
authors.forename: Xiao-Feng
authors.initials: XF
authors.lastname: Xu
mesh_terms: D029662:Betula / Q000737:chemistry*; D002681:China; D004784:Environmental Monitoring; D007854:Lead / Q000032:analysis*; D010316:Particle Size; D012989:Soil Pollutants / Q000032:analysis*; D014197:Trees
chemical_list: D012989:Soil Pollutants; D007854:Lead