Effect of wheat crops on the persistence and attenuation of antibiotic resistance genes in soil after swine wastewater application
文献类型： 外文期刊
作者： Wang Y.;Sutton N.B.;Zheng Y.;Dong H.;Rijnaarts H.
作者机构：
关键词： ARGs;Attenuation;Soil amendment;Swine wastewater
期刊名称： Journal of Hazardous Materials
ISSN： 0304-3894
年卷期： 2024 年 468 卷
页码：
收录情况： SCIE（2024版） ; ; EI（2024版）
摘要： Swine wastewater (SW) application introduces antibiotic resistance genes (ARGs) into farmland soils. However, ARG attenuation in SW-fertigated soils, especially those influenced by staple crops and soil type, remains unclear. This study investigated twelve soil ARGs and one mobile genetic element (MGE) in sandy loam, loam, and silt loam soils before and after SW application in wheat-planted and unplanted soils. The results revealed an immediate increase in the abundance of ARGs in soil by two orders of magnitude above background levels following SW application. After SW application, the soil total ARG abundance was attenuated, reaching background levels at 54 days; However, more individual ARGs were detected above the detection limit than pre-application. Among the 13 genes, acc(6′)-lb, tetM, and tetO tended to persist in the soil during wheat harvest. ARG half-lives were up to four times longer in wheat-planted soils than in bare soils. Wheat planting decreased the persistence of acc(6′)-lb, ermB, ermF, and intI2 but increased the persistence of others such as sul1 and sul2. Soil type had no significant impact on ARG and MGE fates. Our findings emphasize the need for strategic SW application and the consideration of crop cultivation effects to mitigate ARG accumulation in farmland soils. © 2024
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