Influence of chemical pollutants on stability of forest soil microbiocenoses (natural model experiments)

The influence of different concentrations (10, 30, 50, 100, 150, 300) of the maximum permissible concentrations of fluoride and sulfide pollutants (Na₂SO₄, NaF and Na₂SO₃ + NaF) on highly buffered soils of larch forest of Pogorelskii pine wood in Krasnoyarsk forest-steppe was studied. As a result of the influence of treatment with high concentrations of fluoride and sulfide compounds, the intensity of respiration of microorganisms and values of the microbe metabolic coefficient increased, and the biomass of microorganisms and enzymatic activity decreased compared to the control by 1.3–2.7 times. By the end of vegetation, the ecophysiological condition of microbiocenoses of the studied experimental plots had stabilized.