Bai Jun-Hong, Deng Wei, Fang Hua-Jun, Xu Xiao-Feng
Lab. for Wetland Process and Environment, Changchun Institute of Geography, Chinese Academy of Sciences, Changchun 130021, China.
J Environ Sci (China). 2002 Jul;14(3):325-9.
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.
研究了长白山国家级自然保护区垂直带土壤-植物系统中铅元素（Pb）的垂直和水平变化特征。结果表明，垂直带土壤中Pb含量均高于25mg/kg，各土壤带平均Pb含量与其变异程度呈负相关，即棕色针叶林土带在四个土壤带中平均Pb含量最低，水平变异最高；而山地草甸森林土平均Pb含量最高，水平变异最低；各植物带植物Pb平均含量均分别低于全球植物Pb平均水平（克拉克值），植物Pb含量顺序与土壤Pb含量顺序一致，但它们的水平变异与土壤带不同，山地冻原森林带变异最高，而岳桦林带最低。植物Pb的垂直变异明显高于土壤，变异系数达89.76%；植物对Pb的富集能力取决于植物种类及植物的不同器官；母质与母岩、pH值、土壤有机质及土壤颗粒组成等是影响长白山国家级自然保护区垂直带土壤-植物系统中Pb含量变化的主要因素。
