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Gain, Feed Efficiency and Carcass Characteristics of Swine Fed Supplemental Lysine and Methionine in Corn-Soybean Meal Diets during the Growing and Finishing Periods^{1, 2,}

South Dakota State University, Brookings 57006

Abstract

Two trials involving 210 crossbred pigs were conducted to study the effect of dietary protein level and L-lysine HC1 and DL-methionine supplementation during the growth (13.5 and 17.5 kg, respectively, to 50.0 kg) and finishing (50.0 to 95.0 kg) periods. Rate of gain and feed/gain of pigs fed a 14% protein diet during the growing period were slightly, although not significantly, inferior to those of pigs fed diets of 17% protein or 14% protein supplemented with 0.1% lysine. Rate of gain during the finishing period was not influenced by level of dietary protein (14 vs. 11%) or lysine supplementation. However, pigs fed the low protein diet supplemented with 0.2% methionine gained significantly (P< .05) slower in trial 1. Feed/gain was significantly (P< .01) higher when pigs were fed the 11% protein diet or this diet supplemented with 0.2% methionine compared to pigs fed diets of 14% protein or 11% protein supplemented with lysine.

¹ Published with the approval of the Director of the South Dakota Agricultural Experiment Station as Publication. No. 1244 of the Journal Series.

² Department of Animal Science.