Evaluation of Antibiotic Pollution in Soil of Vegetable Base in Yangling District，Shaanxi Province

In order to evaluate pollution status of antibiotics in soil of vegetable bases in Yangling District，contents of 19 antibiotics in 4 categories of quinolones，tetracyclines，sulfonamides and macrolides in soil samples from 20 bases were detected and analyzed.Results showed that，quinolones，sulfonamides and tetracyclines were all detected in 100% of soil samples，and detection rate of macrolides was 62%.The average contents of four antibiotics from high to low were quinolones（51.76 μg/kg）>tetracyclines（12.77 μg/kg）>sulfonamides（1.14 μg/kg）>macrolides（0.28 μg/kg），and norfloxacin，oxytetracycline，sulfamethazine and erythromycin were the main contents，respectively.According to trigger value of ecological toxic effect of antibiotics in soil（100 μg/kg）proposed by the Steering Committee of the International Coordinating Committee for Veterinary Medicine（VICH），contents of four classes of antibiotics in soil of study area were all lower than trigger value，indicating a small ecological risk.Compared with other domestic research reports，vegetable bases in this study area were also at a relatively low level of antibiotic pollution.