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Addition of Synthetic Nutrients to Protein Supplemental Feeds in Swine Rations¹

Minnesota Agricultural Experiment Station

Abstract

Fish meal was a more efficient supplement to corn than tankage or soybean oilmeal. The average daily gain of pigs fed fish meal was considerably higher than the gains when tankage or soybean oilmeal furnished the supplemental protein. The addition of choline to the ration containing soybean oilmeal had a depressing effect upon daily feed consumption and rate of gain. The addition of methionine to the ration containing soybean oilmeal did not alter the average daily gain or feed consumption in spite of severe scouring of the pigs receiving methionine. The interaction of some ingredients of the ration plus methionine caused scouring as indicated by a reversal experiment following the original trial. This scouring may have been caused by a more active intestinal flora for it was arrested by oral administration of sulphathaladine.

¹ Paper No. 2238, Scientific Journal Series of the Minnesota Agricultural Experiment Station.

² The assistance of Dr. J. W. Hayward and Mr. L. B. Corman of Archer-Daniels-Midland Co., Minneapolis, Minnesota, is gratefully acknowledged.