Chitosan as additive affects the bacterial community, accelerates the removals of antibiotics and related resistance genes during chicken manure composting

文献类型： 外文期刊

第一作者： Liu, Hongdou

作者： Liu, Hongdou;Ye, Xuhong;Chen, Songling;Sun, Aobo;Duan, Xinying;Zhang, Yanqing;Zou, Hongtao;Zhang, Yulong;Liu, Hongdou;Ye, Xuhong;Chen, Songling;Sun, Aobo;Duan, Xinying;Zhang, Yanqing;Zou, Hongtao;Zhang, Yulong;Liu, Hongdou;Ye, Xuhong;Chen, Songling;Sun, Aobo;Duan, Xinying;Zhang, Yanqing;Zou, Hongtao;Zhang, Yulong;Zhang, Yanqing

作者机构：

关键词： Chitosan addition; Antibiotic resistance gene (ARG); Potential host bacteria; Aerobic composting; In-feed antibiotic

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）

ISSN： 0048-9697

年卷期： 2021 年 792 卷

页码：

收录情况： SCI

摘要： Manures, storages for antibiotic resistance genes (ARGs), pollute soil and water as well as endanger human health. Recently, we have been searching a better solution to remove antibiotics and ARGs during aerobic composting. Here, the dynamics of chitosan addition on the profiles of 71 ARGs, bacterial communities, chlortetracycline (CTC), ofloxacin (OFX) were investigated in chicken manure composting and compared with zeolite addition. Chitosan addition effectively reduces antibiotics contents (CTC under detection limit, OFX 90.96%), amounts (18) and abundance (56.7%, 11.1% higher than zeolite addition) of ARGs and mobile genetic elements (MGEs) after 42 days composting. Network analysis indicated that a total of 27 genera strains assigned into 4 phyla (Firmicutes, Proteobacteria, Actinobacteria and Bacteroidetes) were the potential hosts of ARGs. Redundancy analysis (RDA) demonstrated that bacterial community succession is the main contributor in the variation of ARGs. Overall, chitosan addition may effect bacterial composition by influencing physic-chemical properties and the concentration of antibiotics, Cu2+, Zn2+ to reduce the risk of ARG transmission. This study gives a new strategy about antibiotics and ARGs removal from composting on the basis of previous studies. (C) 2021 Elsevier B.V. All rights reserved.

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