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Environmental consequences of using antibiotics in agriculture in the Baikal Region

The article presents the results of a study that investigated the phytotoxicity of tetracycline, one of the most frequently used antibiotics in agriculture when raising farm animals that enters the soil in high concentrations with manure when applied to fields as fertilizer. Tests to assess the phytotoxicity of tetracycline and wastewater from the manure storage of one of the pig breeding farms located in the Usolye Municipality of the Baikal Region were carried out by seed germination according to the GOST method. As test organisms, we used shelling peas, whole-leaved garden cress (dicotyledonous plants), and Asian rice (monocotyledonous plant). It was found that significant inhibition of the vital functions of test plants, such as germination energy and seedling length, was observed at tetracycline concentrations of 50-100 mg/L. Peas were more sensitive to tetracycline contamination, and of the studied functions - the length of the roots. Tetracycline at concentrations of 25 mg/L and below can accumulate in plants and enter into metabolic changes with the participation of oxidases, primarily peroxidases.