The level of environmental contamination can vary according to different types of land use. The aim of the present study was to determine the relations among Cd, Pb, Ni and Cr content in plants (Taraxacum officinale) and soils for 10 types of land use in the urban areas of representative cities for central Europe region (Warsaw, Poznan and Wroclaw in Poland). Descriptive statistical analysis, as well as cluster analysis and principal component analysis, heatmaps and Andrews curves, was performed to identify relations between HMs and land use, as well as differences between particular cities. The investigations revealed variation among sites, plant organs and cities. The content (mg kg⁻¹ DW) in soils, roots and leaves for Cd varied between 0.4 and 3.6, 0.4–2.8 and 0.5–3.9, Cr ranged between 23.2 and 40.6, 14.0–26.1 and 15.8–24.8, Ni varied between 2.1 and 13.2, 0.2–42.1 and 0.0–3.9, while Pb varied between 27.0 and 231.5, 4.3–34.2 and 3.0–9.5, respectively. It was possible to note some tendencies. Nickel was the element with the highest content in the roots (up to 42.1 mg kg⁻¹ DW) in comparison to leaves and soils and the highest bioaccumulation factor (up to 15.0). This means that the main source of Ni might be contamination of the soil. The cluster analysis of standardized HM levels in leaves revealed that cadmium is a different from the other three elements, which might be related to the translocation factor, for which this element was found to have the highest levels at many sites.

环境污染的程度会根据土地使用的不同类型而变化。本研究的目的是确定中欧地区代表性城市（华沙，波兹南和华沙）10种土地利用类型植物（蒲公英）和土壤中Cd，Pb，Ni和Cr含量之间的关系。波兰的弗罗茨瓦夫）。进行了描述性统计分析，以及聚类分析和主成分分析，热图和安德鲁斯曲线，以识别HM与土地利用之间的关系以及特定城市之间的差异。调查显示地点，植物器官和城市之间存在差异。含量（mg kg ^-1镉在土壤，根和叶中的含量在0.4和3.6之间，0.4-2.8和0.5-3.9之间变化，铬在23.2和40.6之间，14.0-26.1和15.8-24.8之间变化，镍在2.1和13.2、0.2-42.1和之间变化0.0–3.9，而Pb分别在27.0和231.5、4.3–34.2和3.0–9.5之间变化。有可能注意到一些趋势。与叶和土壤相比，镍是根中含量最高的元素（最高42.1 mg kg ^-1 DW），而生物积累因子最高（最高15.0）。这意味着镍的主要来源可能是土壤污染。叶片中标准HM含量的聚类分析表明，镉与其他三个元素不同，这可能与易位因子有关，为此，发现该元素在许多位点中含量最高。