中层
肥料
嗜热菌
生物
堆肥
食品科学
阶段(地层学)
细菌
生物技术
农学
微生物学
抗生素
遗传学
古生物学
作者
Rukun Cao,Jian Wang,Weiwei Ben,Zhimin Qiang
出处
期刊:Chemosphere
[Elsevier]
日期:2020-02-11
卷期号:250: 126181-126181
被引量:87
标识
DOI:10.1016/j.chemosphere.2020.126181
摘要
The variation of antibiotic resistance genes (ARGs) and influential factors in pig manure composting were investigated by conducting simulated composting tests using four different supplement materials (wheat straw, corn straw, poplar sawdust and spent mushroom). The results show that the relative abundance of total ARGs increased by 0.19-1.61 logs after composting, and tetX, sulI, sulII, dfrA1 and aadA were the major contributors. The variations of ARG profiles and bacterial communities throughout the composting were clearly divided into mesophilic-thermophilic and cooling-maturation stages in all tests, while different supplement materials did not exert a noticeable influence. Network analysis demonstrated the diversity of bacterial hosts for ARGs, the existence of multiple antibiotic resistant bacteria, and the weak correlations between ARGs and physicochemical factors in the composting piles. Of note, integron intI1 and Mycobacterium (a potential pathogen) were positively correlated with eight and four ARGs, respectively, that displayed increased abundance after composting.
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