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Journal of Animal Science, Vol 68, Issue 9 2736-2747, Copyright © 1990 by American Society of Animal Science

JOURNAL ARTICLE

Interrelationships of dietary sodium, potassium and chloride on growth in young swine

D. I. Golz and T. D. Crenshaw
Dept. of Meat and Anim. Sci., University of Wisconsin, Madison 53706.

In a preliminary experiment, pigs fed a purified diet gained at the same rate as pigs fed a natural ingredient diet if the purified diet was formulated to provide 150% of the Na, K and Cl requirements. Subsequent experiments were designed to determine the interrelationships of dietary Na, K and Cl. Pigs were fed diets with Na (.03% to .60%), K (.1% to 1.0%) and Cl (.03% to .60%) levels arranged in a three-factor central composite design. Over the range of Na levels, predicted gain increased by .07 kg/d. Within this dietary range no interactions between Na and K or Na and Cl were observed, but changes in growth due to dietary K level were dependent on the dietary Cl level. Using canonical analysis of the response surface, a minimax of the observed K and Cl interaction was calculated to be .57% K and .27% Cl. An imbalance of dietary K and Cl was predicted to depress gain, and an increase in gain was predicted by a 1:1 addition of K and Cl above or below the minimax. The results of a third experiment failed to confirm that additions of K and Cl in a 1:1 ratio above the minimax altered gain (P greater than .10). Experiment 4 confirmed that an imbalance of K and Cl altered growth of pigs. At .1% K, an increase in dietary Cl from .03% to .57% depressed gain by .07 kg/d; at 1.1% K the same increase in dietary Cl improved gain by .16 kg/d (P less than .07). These results suggest that dietary K and Cl levels have an interactive effect on pig growth.


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R. A. Budde and T. D. Crenshaw
Chronic metabolic acid load induced by changes in dietary electrolyte balance increased chloride retention but did not compromise bone in growing swine
J Anim Sci, January 1, 2003; 81(1): 197 - 208.
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Copyright © 1990 by the American Society of Animal Science.