Abstract
Effects of physiological modifications of thyroid function on serum alkaline phosphatase level in the chicken were studied. The administration of daily doses of 24μg and 48μg of L-thyroxine for 4 days into 6-week-old cockerels caused a significant (100-200%) increase in serum alkaline phosphatase level. Feeding of 0.2% thiouracil in diet for 14 days to 7-week-old cockerels significantly decreased (50%) serum alkaline phosphatase level. Serum alkaline phosphatase level seems to be controlled by thyroid function in the chicken.
