Concentrations of heavy metals (HM) that may have a significant negative impact on plants and soil microbiota have been identified at different pollution levels for sod-podzolic, gray forest, leached chernozem and chestnut soils. The investigated soils can be arranged in descending resistance to HM in the following order: leached chernozem, gray forest soil, chestnut, sod-podzolic soil. A comparison of the results of phytotoxicity determination in growing plants on soils and on soil extracts showed that phytotoxicity on soils polluted with HM appears at lower concentrations than on soil extracts. This is a consequence of low solubility of heavy metal compounds that are strongly sorbed by the mineral and organic components of soils, and also remain in the form of poorly soluble compounds.

中文翻译：

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生物测试方法在土壤生态状况评估中的应用

对于草皮-土壤，灰色森林，黑钙土和栗子土壤，在不同的污染水平下，已经确定了可能对植物和土壤微生物群产生重大不利影响的重金属（HM）浓度。可以按以下顺序对被调查土壤进行抗HM降序排列：沥滤黑钙土，灰色森林土壤，栗子，草皮土壤。对生长中的植物在土壤和土壤提取物中的植物毒性测定结果的比较表明，被HM污染的土壤中的植物毒性比土壤提取物浓度低。这是重金属化合物溶解度低的结果，重金属化合物被土壤的矿物和有机成分强烈吸收，并且仍以难溶化合物的形式保留。