修饰生物炭对抗生素耐药性基因和微生物群落在肥堆肥中的影响
Hunan Liu1, Baihui Shi1, Wenwen Liu1
1National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, Key Laboratory of Agricultural Environment in Universities of Shandong, College of Resources and Environment, Shandong Agricultural University, 61 Daizong Road, Taian, 271018, China.
Environmental science and pollution research international
|September 26, 2023
概括
将修饰生物炭 (MBC) 添加到肥堆肥中,有效地降低了抗生素耐药性基因 (ARG). 这种生物炭处理还改善了堆肥质量,并抑制了与ARG相关的微生物群体,减轻了环境风险.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 农业科学 农业科学
背景情况:
- 牲畜中的抗生素耐药性基因 (ARG) 构成环境风险.
- 堆肥是一种减少ARG的潜在方法,但它的有效性可以提高.
- 修饰生物炭 (MBC) 被探索作为一种添加剂,以改善堆肥过程.
研究的目的:
- 调查在肥堆肥过程中添加MBC对ARG和微生物群落的影响.
- 评估MBC在减少特定ARG和移动遗传元素 (MGE) 丰度方面的有效性.
- 评估MBC对堆肥质量参数的影响,例如发芽指数和植物毒性.
主要方法:
- 便的堆肥中含有不同度的MBC.
- 使用分子方法量化了12种ARG和MGE的丰度.
- 分析了微生物社区的组成.
- 通过发芽指数和植物毒性测试来评估堆肥质量.
主要成果:
- 添加MBC导致更长的高温堆肥阶段,更高的发芽指数和降低的植物毒性.
- 在MBC治疗组中,某些ARG (tetT, tetO, tetM, tetW, ermB, intI2) 的丰度和总ARG显著下降.
- 2%的MBC添加减少了总ARG的0.67倍,是对照组的0.67倍.
- MBC显著降低了与ARG和MGE相关的Firmicutes和Proteobacteria的主导细菌家族的丰度.
- 大多数ARG与MGE相关,MBC减少了MGE的丰度,从而抑制了水平基因转移 (HGT).
结论:
- 经过修改的生物炭有效地减少了肥堆肥中的ARG和MGE.
- MBC提高了堆肥成熟度,降低了植物毒性,表明土壤质量有所改善.
- 该机制涉及减少携带ARG的微生物种群和抑制水平基因转移,从而减轻抗生素耐药性的传播.
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