The fate of antibiotic resistance genes during co-composting of swine manure with cauliflower and corn straw.

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ID: 72957
2019
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Abstract
Composting is not completely effective in reducing antibiotic resistance genes (ARGs) in animal manure. This work studied the effects of different treatment conditions on the fate of ARGs in composting swine manure with cauliflower and corn straw as bulking agents. The results showed that the addition of microbial agents or the ratio of corn stalks to cauliflower (1:12) could significantly decrease the absolute abundances of most ARGs (an average of 480 times) compared with the control treatment. Principal component analysis indicated that bacterial communities were significantly correlated with ARG abundance, suggesting that microbial communities have an impact on ARG variation during co-composting. Redundancy and Network analysis confirmed the changing patterns of individual ARGs (qnrS, bla, bla) were influenced by the selectivity of host bacteria (Pseudomonas, Klebsiella, and Halocella) and environmental variables (TN, NH-N, TOC, and pH). These findings helped to optimize composting conditions, thereby reducing the risk of ARGs spread.
Reference Key
li2019thebioresource Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Li, Houyu;Cheng, Weimin;Li, Bihan;Xu, Yan;Zheng, Xiangqun;
Journal Bioresource technology
Year 2019
DOI
S0960-8524(19)31898-X
URL
Keywords
bacterial community antibiotic resistance genes corn straw cauliflower co-composting

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