Humus Soil Inhibits Antibiotic Resistance Gene Rebound in Swine Manure Composting by Modulating Microecological Niches.

ABSTRACT: Aerobic composting is widely used for the degradation of organic matter, simultaneously reducing the presence of antibiotic resistance genes (ARGs) in swine manure. However, the phenomenon of abundance rebound or even enrichment of ARGs is still a problem. The effect and mechanism of humus soil (Hs) on ARG reduction by adding it into the piles (0% for the control group (CK); 10% for S1 group; 20% for S2 group; and 30% for S3 group) after the thermophilic phase of composting was investigated. The results indicated that Hs promoted organic matter degradation and nitrogen loss. During days 15-36, the greatest reduction of 69.91% in total ARG abundance was observed in S2, while the abundance rebounded by 222.75% in CK and decreased only 13.71% in S3. With the 20% Hs addition, 85.42% abundance

SUBMITTER: Hao X 

PROVIDER: S-EPMC11944299 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature