分析揭示了使用生物炭控制土壤中抗生素耐药性基因的过程和条件
Dishen Li1, Pinjie Su2, Mingbo Tang3
1School of Environment, Liaoning University, Shenyang, 110036, China.
Journal of environmental management
|May 13, 2025
概括
生物炭的应用通过降低抗生素含量和改变细菌群落,显著减少土壤中的抗生素耐药性基因 (ARG). 来自木材的生物炭和中性的性土壤条件提高了ARG修复的有效性.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 土壤科学 土壤科学
背景情况:
- 土壤含有抗生素耐药性基因 (ARG),造成临床感染和植物疾病的风险.
- 已知生物炭可以降低土壤ARG,但机制和影响因素需要进一步阐明.
研究的目的:
- 对已发表的研究进行元分析,以了解生物炭如何修复ARG污染的土壤.
- 确定影响生物炭在减少土壤ARG中的有效性的主要因素.
主要方法:
- 对65项已发表的研究进行了元分析,调查生物炭对土壤ARG的影响.
- 使用统计分析量化生物炭对抗生素含量,移动遗传元素,ARG宿主细菌和ARG总体丰度的影响.
主要成果:
- 生物炭修正案导致抗生素含量减少24.1%,移动遗传元素减少23.5%,ARG宿主细菌减少12.1%.
- 总体而言,土壤ARG的丰度下降了41.8%,这归因于抗生素减少,移动元素抑制和细菌群落改变.
- 在300-500°C下烧解的木制生物炭显示出优异的ARG修复作用,与酸性土壤相比,性土壤和中性土壤的效果更为明显.
结论:
- 生物炭通过多种机制有效地减轻土壤中的ARG,包括降低抗生素水平和修改微生物群落.
- 优化的生物炭特性 (木材衍生,300-500°C热解) 和土壤pH (性/中性) 增强了ARG修复.
- 这项研究为制定控制和预防土壤生态系统中ARG污染的策略提供了关键的见解.
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