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Nutritive Value of Lard as Affected by the Proportion of Fat in the Diet

Animal Husbandry Division, Bureau of Animal Industry, Agricultural Research Administration, U. S. Department of Agriculture, Beltsville, Maryland²

Modified paired-feeding experiments were conducted with three groups of 8 young male albino rats to determine the effects of isocaloric diets containing 5.0, 10.98, and 18.27% of lard upon gains in weight, fat, protein, and energy, and upon the efficiency of utilization of feed energy.

No statistically significant differences were found in the gains in weight, in the storage of fat, protein or energy, or in the efficiency of the utilization of feed energy as related to the fat content of the diets.

² The authors wish to give credit to Ivan Lindahl and Harry Slofsky of the Bureau staff for determining the gross energy values of diets and carcasses, and for the statistical work, respectively, in connection with the study.

Manuscript received 29 January 1952.