Diagnostics of Lithium Ecotoxicity in Soils of Different Buffering Capacity by Invertase Activity

The study of the effect of lithium pollution on invertase activity in Haplic Chernozem, Eutric Cambisol and Eutric Arenosol was carried out. Lithium was introduced in the form of chloride and hydroxide at concentrations of 15, 100 and 500 mg/kg. The control was uncontaminated soil with a natural background content of the element. Incubation was carried out for 10 days. As a result of the study of the effect of lithium pollution on invertase activity in soils of different buffering, it was found that contamination of the studied soils with lithium compounds leads to a decrease in invertase activity. The change in enzymatic activity depended on the concentration of the element in the soil. When low concentrations of lithium compounds are introduced, the effect of hormesis is recorded. Haplic Chernozem and Eutric Cambisol showed the greatest resistance to lithium contamination, while Eutric Arenosol showed the least resistance.