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Raw cull peanuts as a fat source in diets for pigs

, : Raw cull peanuts as a fat source in diets for pigs. Soil & Crop Science Society of Florida Proceedings 57(0): 92-95

Raw peanut seed contains 40 to 55% oil. Peanuts not suitable for human consumption are used in the production of peanut oil. An alternative use of these "oil stock" peanuts is as a fat source in pig diets. A study was conducted to evaluate raw cull peanuts as a potential fat source when included at a low level in diets for growing and finishing pigs. The trial involved 90 pigs (30 kg average initial weight per pig) and three dietary treatments. Treatments consisted of diets with added fat (livestock feed fat-brown grease) at 4.5% of the diet and two raw cull peanut diets, 'Florunner' and an unnamed cultivar of peanuts that contained a high content of oleic acid (high oleic). Peanuts were added at 10% of the diet to add the same level of fat/oil as the feed fat-added diet. Diets were corn-soybean meal based. The peanuts averaged 43 and 40% crude fat for the two types (81 and 80% unsaturated, respectively); the feed fat was 69% unsaturated. Pigs were fed to 109 kg average final weight. Pig growth and feed efficiency were not affected (P > 0.10) by dietary treatment. Calculated carcass lean content also was not affected (P > 0.10) by treatment. Carcass fat firmness decreased slightly (P < 0.10) for pigs fed the peanut diets compared to pigs fed the feed fat-added diets. Average firmness scores indicated that the carcass fat was still firm enough for the meat processor. Inclusion of raw cull peanuts at 10% of the diet appeared to be well utilized as a fat source, with minimal negative effect on carcass fat firmness.

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