Distribution Characteristics of Typical Antibiotic-Resistant Bacteria and Antibiotic Resistance Genes in Different Land Types in Jinji River Basin
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1.Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences;2.Beijing Animal Husbandry General Station

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the National Key R & D Program of China (No. 2023YFC3207701); Beijing Innovation Consortium of Livestock Research System (Beijing Livestock Innovation Consortium) (BAIC05-2025) and the Agricultural Science; Technology Innovation Program of the Chinese Academy of Agricultural Sciences (No. CAAS-CFSGLCA-IEDA-202302)

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    Abstract:

    【Objective】 The application of antibiotics has significantly advanced animal husbandry and agriculture. However, the resulting contamination by antibiotic-resistant bacteria (ARB) and antibiotic resistance genes (ARGs) poses a severe threat to the ecological environment and human health. This study aims to systematically investigate the effects of different land use types within the same region on the distribution of ARB and ARGs in soil. 【Method】 This study collected 210 soil samples from six typical land use types (vegetable fields, wheat fields, flower gardens, orchards, nurseries and livestock farms) in the Jinji River basin of Beijing. The abundance of total cultivable bacteria, chlortetracycline-resistant bacteria, sulfamethoxazole-resistant bacteria, and representative ARGs in the soil was measured. Additionally, the structural characteristics of representative soil microbial communities were analyzed using high-throughput sequencing technology. 【Result】 The results indicate that the resistance contamination in Zhang Town and Longwantun Town of the Jinji River basin was the most severe. The abundance of ARB, ARGs, and intI1 in vegetable field soil was significantly higher than that in other land use types (P<0.05). Bacteroidetes, Firmicutes, Saccharibacteria, and Deinococcus-Thermus were the dominant bacterial phyla in the soil. Also, Lysobacter and Devosia were identified as the main host bacteria for ARGs, and they showed significant positive correlations with sul1, sul2, tetG, tetX, and intI1 (P<0.05). 【Conclusion】 Based on our results, the resistance level of vegetable field soil in the Jinji River sub-basin was significantly higher than that of other land use types. Thus, it is essential to focus on the optimized application of organic fertilizers to reduce the potential risks of soil microbial resistance and ecological health.

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History
  • Received:February 13,2025
  • Revised:August 25,2025
  • Adopted:September 22,2025
  • Online: November 12,2025
  • Published:
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