Korean Journal of Soil Science and Fertilizer ISSN:0367-6315(Print) 2288-2162(Online) 한국토양비료학회 학회지

The veterinary antibiotics treated to livestock have a potential risk to reach to soil and water environment, and eventually be taken up by plants. The objective of the study was to investigate the effect of zeolite and shell meal fertilizer amendment on antibiotic uptake by plant when veterinary antibiotics in chicken manure compost were applied to agricultural land. Model antibiotics used in the study were chlortetracycline (CTC), tylosin (TYL), and sulfamethazine (SMT). Chlortetracycline level in lettuce was decreased to less than 0.08 ug kg^-1 by application of zeolite as compared with about 0.26 ug kg^-1 for control without amendment on 33 days after transplanting. Tylosin was not detected for all the treatment. Sulfamethazine levels in lettuce ranged from 11 to 19 μg kg^-1on a fresh weight basis and gradually decreased with time. Zeolite application decreased the SMT levels in lettuce by greater extent than shell meal fertilizer amendments. Results from the 61-d greenhouse experiment imply that application of zeolite at a rate of 1.5 Mg ha^-1 or shell meal fertilizer at a rate of 2.0 Mg ha^-1 can reduce CTC and SMT concentration in lettuce cultivated in soil fertilized with antibioticcontaminated chicken manure compost.

Concentrations of (a) CTC and (b) SMT in lettuce leaves on 33, 49, and 61 days after transplanting. SMF1 and SMF2 denote shell meal fertilizer application at levels of 0.5 and 2 Mg ha^-1, respectively and Zeolite1 and Zeolite2 denote zeolite at rates of 1.5 and 6 Mg ha^-1, respectively.