Effects of nitrogen fertilization on the fate of high-risk antibiotic resistance genes in reclaimed water-irrigated soil and plants
文献类型： 外文期刊
作者： Cui, Erping 1 ; Zhou, Zhenchao 3 ; Cui, Bingjian 1 ; Fan, Xiangyang 1 ; Abid, Abbas Ali 4 ; Chen, Taotao 1 ; Gao, Feng 1 ; Du, Zhenjie 1 ;
作者机构： 1.Chinese Acad Agr Sci, Inst Farmland Irrigat, Xinxiang 453002, Peoples R China
2.Chinese Acad Agr Sci, Grad Sch, Beijing 100000, Peoples R China
3.Zhejiang Univ, Coll Environm & Resource Sci, Dept Environm Engn, Hangzhou 310058, Peoples R China
4.Zhejiang Univ, Zhejiang Prov Key Lab Agr Resources & Environm, Key Lab Environm Remediat & Ecol Hlth, Hangzhou 310058, Peoples R China
关键词： Nitrogen fertilization; Antibiotic resistance genes; Bacterial community; Reclaimed water irrigation; Soil-plant system
期刊名称：ENVIRONMENT INTERNATIONAL （ 影响因子：9.7； 五年影响因子：11.6 ）
ISSN： 0160-4120
年卷期： 2024 年 190 卷
页码：
收录情况： SCI
摘要： High-risk antibiotic resistance genes (ARGs) in reclaimed water-irrigated soil pose a potential threat to ecosystem and human health. Inorganic fertilization - including with nitrogen, a key ingredient in agricultural production - may affect the ARG profile in soil. However, little is known about nitrogen fertilization's influence on ARGs profiles in the soil-plant system. This study investigated the effects of different nitrogen fertilizer types (CO (NH2)(2), NO3--N (NaNO3) and NH4+-N (NH4HCO3)) and different nitrogen fertilizer application rates (low, medium, high) on the distribution of high-risk ARGs in reclaimed water-irrigated soil and plants using quantitative PCR, high-throughput sequencing and metagenomic sequencing. Soil microcosms results revealed that nitrogen fertilization significantly affected the pattern of high-risk ARGs in soil, and also affected high-risk ARGs abundance and transfer capacity in plants. Compared with nitrogen fertilizer application rate, nitrogen fertilizer types significantly contributed to enhancing the soil resistome, with the order of CO(NH2)(2) > NO3--N ti NH4+-N. The medium application of NO3--N and NH4+-N significantly reduced high-risk ARGs abundance in the leaf endophyte. Bacterial community mainly drove the variation of ARGs in nitrogen-fertilized soil-plant system, and class I integron and metal resistance genes (MRGs) also had direct effects on these high-risk ARGs. A similar high-risk ARGs pattern was also found in field plot experiments, and several dangerous pathogens were observed as the main high-risk ARGs potential hosts in nitrogen-fertilized soil. Based on an economic assessment, application of NH4+-N (NH4HCO3) could reduce costs by $1,312.83 ha(-1) compared with NO3--N (NaNO3). These results showed that the more important role of nitrogen type might be an effective and economical way to control high-risk ARGs spread in soil-plant system under reclaimed water irrigation.
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