Dynamics of physicochemical properties, microbial composition, and antibiotic and antibiotic resistance genes during chicken manure composting with strain T4

文献类型： 外文期刊

第一作者： Wei, Qihang

作者： Wei, Qihang;Wei, Qihang;Wang, Xiaoxing;Feng, Yao;Li, Zhaojun;Wei, Qihang;Ren, Yanfang;He, Junyu

作者机构：

关键词： Antibiotic; Composting; Antibiotic resistance gene; Microbial community structure; Antibiotic-degrading strain

期刊名称：JOURNAL OF SOILS AND SEDIMENTS （ 影响因子：3.6； 五年影响因子：3.8 ）

ISSN： 1439-0108

年卷期： 2024 年

页码：

收录情况： SCI

摘要： PurposeCo-composting of chicken manure and edible mushroom residue inoculated with oxytetracycline-degrading strain T4 was conducted to reduce the risk of residual oxytetracycline and tetracycline resistance genes (TRGs) to the ecological environment.Materials and methodsThree treatments (CK: without bacteria agent T4 inoculated; AM: 1% bacteria agent T4 inoculated in mesophilic phase; AC: 1% bacteria agent T4 inoculated in cooling phase) were set to investigate dynamics of physicochemical properties, microbial composition, and antibiotic and antibiotic resistance genes.Results and discussionThe bacteria agent T4 inoculated in the mesophilic phase was conductive to the reservation of nutrients and maturity of chicken manure and improved oxytetracycline degradation (t1/2 was 2.77 days, and the total degradation rate was 80.78%). Bacterial community dynamic analysis showed that strain T4 reduced microbial richness and diversity in composting. In addition, the bacteria agent T4 could reduce the relative abundance of encoding efflux pump (EFP) TRGs significantly, and inoculated in the mesophilic phase was better than the cooling phase while having little effect on ribosomal protection protein (RPP) TRGs and enzymatic inactivation (EI) TRG.ConclusionsInoculation of strain T4 in the initial stage of composting could be a promising technology to solve the problem of oxytetracycline residue and its resistance genes in chicken manure. It was also found that the abundance of TRGs was affected by bacterial composition and dynamic, which was affected by the physicochemical properties of composting and fates of oxytetracycline, and vice versa.

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