CHLORTETRACYCLINE IN SOIL AMENDED WITH POULTRY MANURE

Abstract

Poultry manure from birds fed a ration containing 11 μg chlortetracycline (CTC)/g feed contained 22.5 μg CTC/g. Recovery rates of CTC added to manure were low (22–28%), so 22.5 μg/g must be considered a low estimate. When manure containing CTC was added to soil, no CTC was recovered at manure to soil ratios greater than 1:10. CTC in manure added to soil at practical levels did not affect the respiration pattern of the soil.