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"Dried Fat" for Growing-Finishing Swine^1,2,

University of Nebraska, Lincoln 68583

Abstract

Three trials were conducted to determine the effect of "dried fat" (fats absorbed on carriers) in diets for growing-finishing swine. In trial I pigs receiving diets containing 5% added fat gained faster (.74 vs .71 kg/d), consumed less feed (1.87 vs 2.43 kg/d) and had a better feed efficiency (2.52 vs 2.88) than pigs fed diets without added fat (all P<.01). Pigs given the "dried fat" treatments gained faster (P<.01) and more efficiently (P<.01) than pigs fed the nonfat carrier counterpart. "Dried fats" containing whey plus fat and wheat bran plus fat produced similar performance to that observed with pigs fed a conventional tallow diet. Pigs fed verxite plus fat had higher feed intakes and feed:gain ratios (P<.01) than pigs on the other two "dried fat" treatments. In trial II, diets with 5% added fat had higher (P<.01) average apparent energy and protein digestibilities than the diets without added fat. Each treatment containing "dried fat" resulted in higher (P<.01) apparent energy and protein digestibilities than did the nonfat counterpart. The verxite plus fat diet had a lower apparent protein and energy digestibility than the bran plus fat and whey plus fat treatments. The third trial was conducted to determine the interaction between protein and energy content of the diet. Five treatments contained 14% protein and five, 18% protein. "Dried fat" (HoMilc 7-60) was added to provide 0, 4, 8, 12 and 16% added fat within each protein level. Average daily gain and feed efficiency improved linearly (P<.01) as the level of added fat increased in the diet. Backfat increased (P<.05) as the level of fat increased in the diet. Pigs receiving the 14% protein diets had more backfat (P<.01) than those given the 18% protein diets (3.79 vs 3.52 cm).

¹ Published as Paper No. 6768, Journal Ser. Nebraska Agr. Exp. Sta.

² Research supported in-part by Fats and Protein Research Foundation, Des Plaines, IL.

³ Present address: DeKalb Feeds Inc., Rock Falls, IL.

⁴ Present address: Anim. Sci. Dept., Univ of Missouri, Columbia.

⁵ Present address: Anim. Sci. Dept., Univ. of Wisconsin, Madison.