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    China is the world's largest livestock and poultry breeding country, but also the largest use of veterinary antibiotics. When a large amount of chicken manure is applied to the soil, it will cause the number of antibiotic residues and resistant bacteria to increase, which will bring about the pollution of antibiotic resistance genes (ARGs) in the soil, and then increase the risk of environmental pollution and human health. Field experiments were conducted to study the changes of soil tetracycline antibiotic residues, resistant bacteria and resistance genes treated with different types and dosage of chicken manure (no chicken manure, (CK), low fresh chicken manure treatment (300 kg·667 m-2), high fresh chicken manure treatment (600 kg·667 m-2), low decomposed chicken manure treatment (300 kg·667 m-2) and high decomposed chicken manure treatment (600 kg·667 m-2)). After one-year application of chicken manure, content of soil organic matter increased by 1.0%-3.2% compared with the control. The activity of soil catalase significantly increased by 84.3-91.5%, 81.9-102.9% in fresh and decomposed chicken manure treatments compared with the control, respectively. The amount of soil resistant bacteria under the same treatment was in the order of Anti-OTC > Anti-TC > Anti-CTC. After one-year application of chicken manure, the total tetracycline amount in the soil was increased by 168.5-217.9% compared with the control. The amount of antibiotic residue in soil treated with fresh chicken manure was 3.0-9.1% higher than that treated with decomposed chicken manure. The abundance of ARGs in the soil was in the order of that treated with high fresh chicken manure > low fresh chicken manure > high decomposed chicken manure > low decomposed chicken manure. The risk of tetracycline antibiotics to soil ecological environment may be greatly reduced after chicken manure decomposed. © 2021. The Author(s), under exclusive licence to Springer Nature B.V.


    Longshui Xu, Weizhong Wang, Weihong Xu. Effects of tetracycline antibiotics in chicken manure on soil microbes and antibiotic resistance genes (ARGs). Environmental geochemistry and health. 2022 Jan;44(1):273-284

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    PMID: 34114159

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