Abstract
The influence of bacterial-humus preparations based on Gumigel (Agrosintez Company) on the biological activity of soddy-podzolic soil polluted with Pb(CH3COO)2 and gasoline was studied in a model experiment. Some indicators of biological activity are shown to depend on soil pollution to different extents. The process of nitrogen fixation and the activity of dehydrogenase and phosphatase were mostly inhibited by Pb(CH3COO)2 and gasoline. Gasoline compared to Pb(CH3COO)2 inhibited the soil biological activity to a greater extent. The bacterial-humus preparations exerted a significant positive effect on the biological activity of the polluted soils manifested in the increase of the total number of bacteria and of the enzyme activity (1.5–5.0 times), in the intensification of nitrogen fixation and denitrification (3–8 times), as well as in the increase in the biomass of the plants grown (1.5–2.0 times). The application of bacterial suspensions of pure cultures or the microbial complex without the preparations of humic acids did not always give a positive effect.
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Original Russian Text © E.N. Kozlova, A.L. Stepanov, L.V. Lysak, 2015, published in Pochvovedenie, 2015, No. 4, pp. 452–461.
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Kozlova, E.N., Stepanov, A.L. & Lysak, L.V. The influence of bacterial-humus preparations on the biological activity of soils polluted with oil products and heavy metals. Eurasian Soil Sc. 48, 400–409 (2015). https://doi.org/10.1134/S1064229315020052
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DOI: https://doi.org/10.1134/S1064229315020052