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ASSESSMENT OF THE ECOLOGICAL CONDITION OF DARK BROWN SOIL IN ANTIBIOTIC POLLUTION CONDITIONS
Abstract
In model laboratory studies, the effect of veterinary antibiotic tylosin (concentrations of 1, 10, 100, 1000 mg/kg of soil) on the ecological state of dark brown soil under conditions of contamination with antibiotics and the degree of change of microbiological and biochemical parameters was studied. To assess the ecological state, the following biological indicators were studied: from microbiological - the total number of bacteria, the abundances of bacteria of the genus Azotobacter, from biochemical - the activity of catalase, dehydrogenase, as well as acidity (pH) and phytotoxic properties. It has been established that the contamination of dark brown soil with tylosin leads to a change, to a greater extent, to a decrease in all the biological parameters studied. It has been established that the contamination of dark brown soil with tylosin leads to a change, to a greater extent, to a decrease in all the biological parameters studied. Of the enzymes studied, the antibiotic leads to the greatest decrease in the activity of dehydrogenases than catalases. The decrease in the total number of bacteria when contaminated with tylosin (at a concentration of 1000 mg / kg) is more than 50%, for bacteria bacteria of the genus Azotobacter - 43%. When assessing the phytotoxic properties under conditions of contamination with tylosin, a reduction in the length of the shoots and roots of the radish test object (?Heat? variety) was found, as well as a decrease in the total aboveground phytomass, in the pollutant concentration of 100 and, especially, 1000 mg/kg of soil. Contamination with tylosin leads to a slight shift of pH to the alkaline side.
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