Evaluation of Dietary Salt Levels for Swine. I. Effect on Gain, Water Consumption and Efficiency of Feed Conversion2

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Abstract
Four experiments utilizing 73 crossbred barrows were designed to study the effect of dietary salt (NaCl) levels on average daily gain (ADG), feed conversion and water consumption. Conventional corn-soybean meal diets with varying amounts of supplemental salt and deionized water were offered ad libitum. The salt levels studied ranged from .06 to .48% total dietary salt equivalent. Feed conversion and average daily gains were inferior (P<05) below .20% total dietary salt equivalent. Water consumption was lower for the pigs with deficient salt intakes. Positive correlations between salt intake and average daily gain were significant and up to 48% of the variability of average daily gain can be accounted for by dietary salt alone. With a corn-soybean meal diet containing .06% salt equivalent or less prior to supplementation and the drinking water free of salt, the animals of these experiments required from .10 to .14% supplemental salt to sustain optimal growth and feed conversion. Copyright © 1976. American Society of Animal Science . Copyright 1976 by American Society of Animal Science.

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