Effectiveness of Using Medicago L. Species in Bioremediation Technologies for Oil-Contaminated Gray-Brown Soils of the Absheron Peninsula

The potential use of Medicago L. in the phytoremediation of oil-contaminated gray-brown soils on the Absheron Peninsula is explored. The number of heterotrophic microorganisms in the rhizosphere and rhizoplane of plants, as well as the number of microorganisms of physiological groups growing in contaminated soil, was significantly higher than in uncontaminated soil. Their activity accelerates the self-purification of hydrocarbons from oil-contaminated soils. The total hydrocarbon content in the alfalfa rhizosphere was only 1.5 g/100 g of soil, compared to 7.9 g/100 g of soil, confirming the effectiveness of Medicago L. in the cleanup and restoration of oil-contaminated soils.