The effects of antibiotics on phytoremediation systems have attracted widespread attention to high concentrations of antibiotics in livestock wastewater. In this work, the effects of oxytetracycline (OTC) whose concentration was 0.05-1.00 mg/L on swine wastewater treatment by a duckweed-based phytoremediation systems were explored, including oxidative stress, nutrient production, bioconcentration, and community-level physiological profile. Results showed that the levels of H₂O₂ and peroxidases (PODs) of duckweed increased with an increase of OTC in the first 8 days. However, oxidative stress of duckweed disappeared after 18 days of exposure, except for 1.00 mg/L. Although OTC has negative effects on the production of high-value nutrients in duckweed, 0.05 and 0.25 mg/L OTC promoted the synthesis of starches and flavonoids, and the synthesis of vitamin C could restore after 28 days of exposure. In addition, a community-level physiological profile revealed that 0.05 mg/L OTC could significantly enhance the duckweed associated microorganisms metabolic activity. Therefore, this investigation adds to the understanding of antibiotics stress on high-value nutrients production in hydrophyte when was used to livestock wastewater management and also helps to clarify the metabolism profile of the phyllosphere and rhizosphere microbes; thereby providing new insight into effects of antibiotic on livestock wastewater phytoremediation.

抗生素对植物修复系统的影响引起了人们对家畜废水中高浓度抗生素的广泛关注。在这项工作中，探索了浓度为0.05-1.00  mg / L的土霉素对基于浮萍的植物修复系统处理猪废水的影响，包括氧化应激，养分产生，生物富集和社区一级的生理特征。结果表明，浮萍中H ₂ O ₂和过氧化物酶（PODs）的含量在头8天随OTC的增加而增加。然而，浮萍的氧化应激在暴露18天后消失，除了1.00 毫克/升 尽管OTC对浮萍中高价值养分的产生具有负面影响，但0.05和0.25  mg / L OTC可以促进淀粉和类黄酮的合成，暴露28天后维生素C的合成可以恢复。此外，社区水平的生理学资料表明，0.05  mg / L的OTC可以显着增强浮萍相关微生物的代谢活性。因此，这项研究使人们更加了解了抗生素在用于家畜废水管理中时对水生植物高价值养分产生的压力，并且有助于弄清叶际和根际微生物的代谢情况。从而提供新的见解，了解抗生素对家畜废水的植物修复作用。