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Effects of Dietary Sodium Citrate and Oxytetracycline upon Fattening Lambs^1,2,

Purdue University, Agricultural Experiment Station, Lafayette, Indiana

Abstract

A highly significant increase in rate of gain was observed in lambs on a self-fed fattening diet supplemented with sodium citrate at a level of 60 lb. to 2000 lb. of basal diet. Increased feed consumption and efficiency of feed utilization were also noted. Dietary sodium citrate elicited an increased water intake and urine excretion. The urine had a higher pH, lower specific gravity and lower concentration of citrate although the total citrate excretion in the urine was higher. Urinary mineral excretion measurements revealed a higher Na and K excretion and a lower Mg, Ca and P excretion in lambs receiving sodium citrate. Limited observations indicated similar alteration in mineral excretion with lambs receiving dietary oxytetracycline. Dietary oxytetracycline induced an increased rate of gain, however, not as great as sodium citrate. Visual differentiating characteristics in papillae morphology and pigmentation in lambs receiving oxytetracycline were evident.

¹ Contribution from the Department of Biochemistry, Journal Paper No. 2067, Purdue University, Lafayette, Indiana.

² Oxytetracycline was supplied by Chas. Pfizer and Company, Terre Haute, Indiana.

³ Present address: Department of Medicine, Duke University, Durham, North Carolina.