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Efficacy of Supplemental Lysine, Methionine and Rolled Oats for Weanling Pigs Fed a Low-Protein Corn-Soybean Meal Diet

University of Illinois at Urbana-Champaign, Urbana 61801

Abstract

Two trials involving 175 pigs of mixed breeding, averaging 5 weeks of age and 8.5 kg, were carried out to determine the efficacy of supplemental lysine and methionine when added to a low-protein starter diet. A basal corn-soybean meal diet containing 16% protein was supplemented with either lysine or a combination of lysine and methionine to bring the levels of these amino acids up to those contained in a 19% protein corn-soybean meal diet. A 19% protein complex starter diet containing corn, soybean meal, rolled oats, fishmeal and dried whey was also fed in these trials. In the first trial lysine addition increased rate and efficiency of gain. Addition of methionine to the lysine-supplemented diet was without effect. Weight gain of pigs fed the 16% protein, lysine-supplemented diet was equivalent to that of pigs fed the 19% protein corn-soybean meal control diet. In the second trial there were no differences in gain among treatments, but lysine addition increased gain/feed ratio. Methionine again was without effect. Pigs fed the 19% protein complex starter diet exhibited feed efficiencies superior to those of pigs fed the remaining diets.

A third trial was conducted to determine the efficacy of rolled oats in a 19% protein complex starter diet. Crossbred weanling pigs were fed diets in which rolled oats contributed either none, , or of the grain portion, the rest being comprised of ground yellow corn. Pigs performed similarly on all treatments, suggesting that rolled oats are of questionable value in diets for young pigs.

¹ Present address: Department of Animal Science, Texas Tech University Lubbock 79409.

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