School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, China.
School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, China.
J Environ Manage. 2022 Nov 1;321:116042. doi: 10.1016/j.jenvman.2022.116042. Epub 2022 Aug 24.
Aerobic composting is considered as an economically as well as environmentally friendly technology that prevents the diffusion of ARGs and ARBs from manure to farmland soil, on which many studies have been conducted. However, the transmission route and potential ecological risks of ARGs in soil-vegetable systems after application of manure at different maturity stages remain unclear. Therefore, through a pot experiment, this study analyzed the effects of manure composted from livestock excrement on ARGs and microbial community in different soil-vegetable systems, taking leafy plants (Shanghai green) and tuber plants (carrot) as examples. It was noted that the highly matured manure could reduce the ARGs contamination in soil and crops, and the ARGs in soil tended to accumulate in the direction of plant roots. The edible part of crops often had a more serious ecological risk of ARGs, and the potential pathogenic bacteria and ARGs could harm human health through exposure and dietary routes. In summary, this study provides new evidence for the transmission of ARGs in soil-vegetable systems with different mature stages of manure and highlights the potential safety risks of the transfer of antibiotic resistance from manure to soil and ultimately to the human food chain.
好氧堆肥被认为是一种经济且环保的技术，可防止 ARGs 和 ARB 从粪便扩散到农田土壤，对此已有许多研究。然而，在不同成熟阶段施用粪便后，土壤-蔬菜系统中 ARGs 的传播途径和潜在生态风险仍不清楚。因此，本研究通过盆栽实验，以叶菜类（上海青菜）和根茎类蔬菜（胡萝卜）为例，分析了来自家畜粪便的腐熟堆肥对不同土壤-蔬菜系统中 ARGs 和微生物群落的影响。研究表明，高度腐熟的粪便可以减少土壤和作物中的 ARGs 污染，土壤中的 ARGs 倾向于向植物根系方向积累。农作物的可食用部分通常具有更严重的 ARGs 生态风险，潜在的致病细菌和 ARGs 可能通过暴露和饮食途径危害人类健康。综上所述，本研究为不同成熟阶段粪便的土壤-蔬菜系统中 ARGs 的传播提供了新的证据，并强调了抗生素耐药性从粪便向土壤最终向人类食物链转移的潜在安全风险。
