Effects of Dietary Copper Sulfate and Protein on the Fatty Acid Composition of Porcine Fat

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Abstract
Sixty-four Hampshire × Yorkshire barrows and gilts were fed barley-fishmeal, barley-meat meal, barley-soybean meal or barley-rapeseed meal diets with or without 250 mg supplemental copper per kg diet. Daily feed intake averaged 2.5 kg and was not influenced by dietary protein source or supplemental copper. Pigs receiving the barley-fishmeal and barley-soybean meal diets gained more rapidly and required less feed per kilogram gain than those fed the barley-meat meal or barley-rapeseed meal diets. Rate of gain and feed conversion efficiency were not significantly influenced by supplemental copper. In comparison with animals receiving the basal diets, copper supplementation of the fishmeal, meat meal and soybean meal-supplemented diets resulted in a significant increase in the proportion of UFA and a concomitant decrease in the proportions of SFA present in the backfat of pigs at 34, 45, 57, 68, 79 and 88 kg live weight. Copper supplementation of the barley-rapeseed meal diet did not result in similar changes. Copyright © 1970. American Society of Animal Science. Copyright 1970 by American Society of Animal Science

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