Impact of residual antibiotics on microbial decomposition of livestock manures in Eutric Regosol: Implications for sustainable nutrient recycling and soil carbon sequestration

文献类型： 外文期刊

第一作者： Fang, Linfa

作者： Fang, Linfa;Lakshmanan, Prakash;Su, Xiaoxuan;Shi, Yujia;Chen, Zheng;Zhang, Yu;Xiao, Ran;Chen, Xinping;Lakshmanan, Prakash;Wu, Junxi;Lakshmanan, Prakash;Lakshmanan, Prakash;Sun, Wei

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关键词： Residual antibiotics; Livestock manure decomposition; Microbial community; Co -occurrence network; Enzyme activities

期刊名称：JOURNAL OF ENVIRONMENTAL SCIENCES （ 影响因子：6.9； 五年影响因子：6.2 ）

ISSN： 1001-0742

年卷期： 2025 年 147 卷

页码：

收录情况： SCI

摘要： The land application of livestock manure has been widely acknowledged as a beneficial approach for nutrient recycling and environmental protection. However, the impact of residual antibiotics, a common contaminant of manure, on the degradation of organic compounds and nutrient release in Eutric Regosol is not well understood. Here, we studied, how oxytetracycline (OTC) and ciprofloxacin (CIP) affect the decomposition, microbial community structure, extracellular enzyme activities and nutrient release from cattle and pig manure using litterbag incubation experiments. Results showed that OTC and CIP greatly inhibited livestock manure decomposition, causing a decreased rate of carbon (28%-87%), nitrogen (15%-44%) and phosphorus (26%-43%) release. The relative abundance of gramnegative (G-) bacteria was reduced by 4.0%-13% while fungi increased by 7.0%-71% during a 28 -day incubation period. Co -occurrence network analysis showed that antibiotic exposure disrupted microbial interactions, particularly among G- bacteria, G + bacteria, and actinomycetes. These changes in microbial community structure and function resulted in decreased activity of urease, fi-1,4-N-acetyl-glucosaminidase, alkaline protease, chitinase, and catalase, causing reduced decomposition and nutrient release in cattle and pig ma

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