Vertical migration of antibiotics during rainfall throughout a year in long-term manure-fertilized soils differing in pH
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View abstract on PubMed
Summary
This summary is machine-generated.Antibiotic migration in manure-fertilized soils during rain is significant, especially in acidic and neutral soils. This vertical movement, influenced by rainfall and soil properties, can increase antibiotic resistance genes in leachates.
Area Of Science
- Environmental Science
- Soil Science
- Environmental Chemistry
Background
- Antibiotic presence and movement in soils fertilized with manure are not well understood.
- Long-term manure application can lead to antibiotic accumulation and potential leaching.
Purpose Of The Study
- To investigate the vertical migration of antibiotics in different soil types (acidic, neutral, calcareous) under long-term manure fertilization during rainfall.
- To identify factors influencing antibiotic migration and assess associated environmental risks and antibiotic resistance gene dissemination.
Main Methods
- Analysis of antibiotic concentrations in soil profiles (0-60 cm) and leachates over one year across three soil types.
- Utilized random forest analysis to determine key factors affecting antibiotic migration.
- Conducted environmental risk assessment for antibiotics in leachates.
Main Results
- Higher total antibiotic concentrations in soil profiles and leachates were observed in acidic and neutral soils compared to calcareous soil.
- Rainfall induced vertical migration of antibiotics (tetracyclines, quinolones, sulfonamides) with varying dynamics across soil types.
- Precipitation, soil organic carbon, pH, sand content, and antibiotic Kow were key migration influencers.
Conclusions
- Precipitation drives vertical antibiotic migration in manure-fertilized soils, with soil properties significantly affecting the process.
- While leachates showed low aquatic toxicity, some antibiotic migration correlated with increased high-risk antibiotic resistance genes.
- Findings are crucial for understanding antibiotic fate in soils, especially with increasing severe rainfall events.
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