Pollution characterization and ecological effects of veterinary antibiotic in farmland system
Veterinary antibiotics(VAs),as a class of antimicrobial drugs,are commonly used in treating of bacterial infections in animals and as growth promoters in livestock and poultry feeds,and their use has exceeded 70%of the total global use of antibiotics.The ecological hazards and health risks associated with the agricultural land VAs contamination are of widespread concern.The results of the systematic analysis of the source,environmental behavior and biohazard of VAs in farmland systems showed that VAs mainly enter the farmland system by applying organic fertilizers and wastewater irrigation,among others.Their environmental behavior is affected by their physicochemical properties,and environmental factors,which leads to differences in adsorption capacity,migration rate,half-life,and so on.It can also be enriched by soil microorganisms,animals and crops,which affects their bioactivity.This paper systematically reviewed the pollution characteristics and ecological effects of VAs in farmland systems and analyzed the deficiencies of current researches.It not only could provide reference for related researches,but also could provide a scientific basis for ensuring the sustainable utilization of agricultural soil and water resources and food security.
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