Effect of Dietary Fat Source and Buffer Level on Composition of Depot Fats, Gains and Liver Manganese of Sheep

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Abstract
Forty-four feeder lambs were employed in a 2×2 factorial design experiment to determine the effect of fat source and buffer level in all-concentrate diets on the composition of depot fat and on gains and liver manganese levels. Significant differences in the weight percents of each fatty acid studied occurred between at least two of three depot sites studied (brisket, backfat and kidney). Sheep fed corn oil deposited significantly more linoleic and oleic acids than tallow-fed animals. Tallow-fed animals deposited significantly more palmitoleic and linoleic acids. Depot stearic acid content also was significantly higher in lambs receiving the higher buffer level and a significant buffer level × site interaction occurred. Gains were not affected by fat source but were significantly higher in lambs receiving the higher buffer level. Liver manganese levels were significantly higher in corn oil-fed than they were in tallow-fed lambs.

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