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Effect of Oral Potassium and Sodium Chloride on Plasma Composition of Cattle: A Grass Tetany Related Study¹

University of Nevada, Reno 89507

Abstract

Citric acid (53 g/100 kg body weight) was administered to two blocks of animals, one splenectomized and one intact, with 0, 40, 80 or 160 g KCl/100 kg body weight in water by stomach tube. In a second study animals received either no salts, 80 g KCl, 63 g NaCl or both KCl and NaCl with citric acid administered as before. A latin square experimental design was used with both studies. Serial blood samples were taken and plasma citric acid, Mg, K, Ca and Na measured.

Plasma citric acid increased and generally reached a peak hr. after drenching, regardless of the treatment; the increase was related directly to the amount of salt administered. Within 24 hr. plasma citric acid was within the normal range. Oral KCl and/or NaCl increased plasma Mg, Ca and Na in early periods post-administration. Plasma K was depressed in early intervals in those animals receiving no salt or only NaCl. All plasma constituents were normal in 24 hours. Splenectomized cattle had higher levels of plasma citric acid post-treatment than intact animals.

¹ Nevada Agricultural Experiment Station Journal Series No. 173.