Lysine and Methionine Supplementation of Corn-Soybean Oil Meal Rations for Pigs in Drylot

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Abstract
Corn-soybean oil meal rations containing 12% and 14% protein were supplemented with four levels of L-lysine and/or four levels of DL-methionine and, in a 2 × 4 × 4 factorial arrangement of treatments, fed to pigs weighing 23 lb. until they reached a weight of 100 lb. The 32 ration treatments were imposed on pens of two pigs, one barrow and one gilt, in each of two replicates. On the 12% protein ration, rate of gain and feed efficiency were improved by L-lysine, up to the 0.10% supplemental level. Lysine supplementation of the 14% protein ration exerted no consistent effect. The protein level × supplemental lysine interaction was statistically significant for both rate of gain and feed conversion. Methionine supplementation of the 12% ration exerted no apparent effect on either gains or feed conversion. Methionine supplementation of the 14% ration gave indication of improvement in rate of gain and feed efficiency, up to the 0.05% supplemental level; however, differences were not statistically significant. Copyright © . .