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The Value of Dried Fermentation Solubles for Sows Fed in Drylot during Gestation and Lactation¹

University of Illinois^,3

Abstract

A basal ration composed of ground yellow com, expeller soybean meal, tankage, 5% dehydrated alfalfa meal, vitamin A and D oil, and minerals was nutritionally inadequate for yearling sows and for gilts fed in drylot during gestation and lactation. Only 37% and 9% of the pigs were weaned, respectively, by the yearling sows and the gilts fed this ration. Deficiency symptoms observed in the second test are described in detail.

The addition of either 0.5%, 1.0% or 2.0% of dried fermentation solubles (B-Y) did not correct the deficiency (or deficiencies) of the basal ration.Slight improvement was noted, however, especially in the survival of pigs when the basal diet was fortified with the riboflavin carrier.The first limiting deficiency (or deficiencies) of the basal ration apparently was not riboflavin.

One percent of sardine condensed fish solubles supplied the nutrients needed to correct the first limiting deficiency (or deficiencies) of the basal ration.Very significant improvement in 56 day weights of the pigs was found when 1 % of dried fermentation solubles was supplied in addition to 1% of fish solubles.The pigs produced by sows fed the latter supplements were sleeker, growthier and smoother than pigs from sows not fed the riboflavin carrier.

Comparable results were obtained when sows were fed combinations of either 1% or 2% of fish solubles with 1% dried fermentation solubles. Gestation-lactation performance of sows fed in drylot was significantly improved by feeding rations containing 2.3 milligrams of riboflavin per pound as compared to feeding rations containing 1.2 milligrams of this vitamin per pound. The additional riboflavin (1.1 milligrams per pound of diet) was supplied by dried fermentation solubles.

¹ This investigation was supported by the donation of funds and products to the University of Illinois by Commercial Solvents Corporation, Terre Haute, Indiana. The high-quality dehydrated alfalfa meal used in these tests was kindly supplied, analyzed, and assayed by Ralston Purina Company, St. Louis, Missouri.

² Present address, American Dry Milk Institute, Inc., Chicago, Illinois.

³ Animal Science Department, Urbana, Illinois. Acknowledgment is gratefully made for the assistance of R. F.Van Poucke, formerly Assistant in Animal Science, and of R. H. McDade, Chief Swine Herdsman, and his associates.