Influence of biological product’s carriers on the biological properties of oil-contaminated sod-podzolic soil

Abstract

The article shows the effect of organomineral fertilizers and various disintegrants-carriers of oil-oxidizing biological product of a new generation on the biological indicators of sod-podzolic soil heavily polluted with oil (up to 10%), and on the decomposition rate of oil in it. Sawdust, lowland peat, barley straw, vermiculite, flax shover and lignin were studied as carriers of a bioproduct that showed positive effects during the 2019 growing season. Lignin showed the largest number of heterotrophs, the sawdust – hydrocarbon-oxidizing microorganisms. The introduction of the bioproduct with carriers contributed to the restoration of the enzymatic activity of the contaminated soil. Low-lying peat and flax shover had the greatest positive effect on this indicator. Improvement of biological properties of oil-contaminated soil by carriers of the bioproduct has sharply increased its efficiency in the decomposition of oil in it. The biolproduct in combination with flax shover, lignin and straw reduced the content of oil products as much as possible (by 9.9–10.9 mg/kg or 40.2–44.3%). Organomineral fertilizers also significantly improved the biological properties of oil-contaminated soils and reduced the residual oil content in them by 13.0 mg/kg or 52.8%.