Assessment of veterinary antibiotics from animal manure-amended soil to growing alfalfa, alfalfa silage, and milk

文献类型： 外文期刊

第一作者： Huang, Rongcai

作者： Huang, Rongcai;Guo, Zitai;Gao, Shengtao;Ma, Lu;Xu, Jianchu;Bu, Dengpan;Xu, Jianchu;Xu, Jianchu;Yu, Zhongtang;Bu, Dengpan;Bu, Dengpan

作者机构：

关键词： Alfalfa; Organic fertilizer; Exposure assessment; Milk; Veterinary antibiotic

期刊名称：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY （ 影响因子：6.291； 五年影响因子：6.393 ）

ISSN： 0147-6513

年卷期： 2021 年 224 卷

页码：

收录情况： SCI

摘要： Using animal manure as organic fertilizer to grow fodder crops is causing public health concerns because animal manure is the major reservoir of veterinary antibiotics. In this study, we used a mathematical model to estimate the risk of human exposure to veterinary antibiotics when using swine manure as organic fertilizer to grow alfalfa (Medicago sativa L.). Alfalfa was planted in a greenhouse and fertilized with swine manure spiked with oxytetracycline (OTC, at 0, 150, and 1500 mg/kg of manure), ofloxacin (OFL, at 0, 15, and 150 mg/kg), or sulfamonomethoxine (SMM, at 0, 5, 15 and 150 mg/kg). Alfalfa was harvested at the budding stage and ensiled for 60 days. Results showed that OTC and OFL could be detected in the alfalfa root, stem, and leaf with a concentration ranging from 8.85 to 59.17 mu g OTC /kg and from 1.50 to 4.10 mu g OFL/kg dry matter, but SMM could only be detected in the root ranging from 29.10 to 63.75 mu g/kg dry matter. The ensiling for 60 days decreased the OFL concentration by 68.7% but only slightly decreased the OTC concentration. The maximum daily exposures of humans to OTC and OFL through liquid milk consumption were estimated to be 5.84E-8 and 1.63E-8 mu g, respectively, both of which are well below the intake levels of OTC (72 mu g) and OFL (54 mu g) mandated by the European Union. The results of the present study indicate that using swine manure as organic fertilizer to grow alfalfa poses a limited risk for human exposure to veterinary antibiotics through the consumption of liquid milk.

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