Estimation of the sustainability of brown forest soil`s microflora to antibiotic pollution

In laboratory model researches resistance of a mikrobotsenoz of the brown forest soil to pollution by biocides (тилозин, a bastion) in concentration 1, 10, 100, 1000 mg/kg of the soil is studied. As a result of the conducted researches the negative impact of pollution of the brown forest soil by biocides, on change of the key microbiological indicators, confirming violation of ecological functions of the soil is established. Extent of influence of biocides is defined by their nature, concentration and terms of influence. The antibiotic тилозин makes stronger impact in comparison with fungicide a bastion. Introduction of small doses of pollutants (1, 10 mg/kg) leads to insignificant increase in number of soil microorganisms. Introduction of pollutants in high concentrations (100, 1000 mg/kg) leads to decrease in abundance of soil microorganisms. The maximum influence of biocides is shown in the first terms after pollution of the soil (3 days), on the subsequent terms of an exposition the tendency to restoration of microbic community is observed, however the complete recovery to control values isn’t observed also on 90 days after pollution.