Growth and Carcass Characteristics of High- and Low-Fat Swine Fed Diets Varying in Protein and Lysine Content

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Abstract
Diets containing either 11 or 16% crude protein were fed to high- and low-fat lines of Duroc and Yorkshire swine during a growing-finishing trial. A reduction in growth rate was significant when the 11% protein diet was fed. Relative decreases in growth rate were greatest for the low-fat lines in each breed. Weights of physically separated lean, fat, and bone were significantly higher for carcasses of animals fed the high-protein diet because of the heavier weights of animals on this treatment at each slaughter age. Increases in relative weights of lean tissue associated with the high-protein diet were greatest in carcasses from lean-line pigs. Taste panel evaluation of cooked samples of the longissimus muscle generally favored those from pigs fed the 11% protein diet. Copyright © 1976. American Society of Animal Science . Copyright 1976 by American Society of Animal Science