抗生素对DAMO过程和牛中的微生物的影响
Ting He1,2, Qidong Yin1, Xu Li1
1Department of Civil and Environmental Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States.
Environmental science & technology
|February 13, 2024
概括
脱无氧甲氧化 (DAMO) 微生物在牛中大量存在. 虽然chlortetracycline没有影响,但高度的蒂洛辛抑制了DAMO,可能会增加甲排放.
科学领域:
- 环境微生物学 环境微生物学
- 农业科学 农业科学
- 生物地质化学生物地质化学
背景情况:
- 牛产生的甲排放对畜牧业对环境的影响有很大影响.
- 脱无氧甲氧化 (DAMO) 是缓解甲排放的一个关键过程.
- 牛中的DAMO微生物的存在和功能仍未得到充分研究.
研究的目的:
- 为了调查牛中的DAMO微生物的存在和丰富性.
- 评估兽医抗生素,特别是甲和泰洛辛对牛中的DAMO过程的影响.
主要方法:
- 在牛中检测到高度的DAMO古生物和细菌.
- 用牛播种的批量反应器的测序表明,随着时间的推移,DAMO活动和微生物生物质的增加.
- 暴露实验评估了不同度的甲和泰洛辛对DAMO活性和微生物基因度的影响.
主要成果:
- 高达5000微克L-1的甲素并没有抑制DAMO活性或微生物基因度.
- 提洛辛在50和500微克L-1的剂量最初增强了DAMO的微生物活性.
- 高度的泰洛辛 (5000μg L-1) 显著抑制了DAMO活性,并减少了微生物种群.
结论:
- 牛中普遍存在DAMO微生物,这表明它们在甲减排中的潜在作用.
- 某些抗生素的度升高,如泰洛辛,可以破坏DAMO过程.
- 抗生素对DAMO的影响可能会影响牛管理系统的净甲排放.
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