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Growth performance and carcass characteristics were evaluated on 1,104 pigs fed combinations of L-carnitine, Paylean, and added fat in a 2 × 2 × 2 factorial arrangement. Dietary treatments of L-carnitine (0 or 50 ppm) and fat (0 or 6%) were initiated at approximately 97 lb. Paylean (0 or 9 g/ton) was fed for the last 4 weeks prior to market. Supplementing dietary carnitine did not affect (P>0.25) growth performance of pigs between 97 to 203 lb. The addition of 6% dietary fat improved (P<0.01) ADG and F/G during this period. During the last 4 weeks of the experiment, when Paylean was fed, a carnitine × Paylean interaction was observed (P<0.04) for ADG and F/G. Both carnitine and Paylean improved growth performance; however, the responses were not additive. Pigs fed added fat had improved (P<0.05) feed efficiency during the Paylean supplementation period.

kansas agricultural experiment station research reports

Interactive effects among L-carnitine, paylean (ractopamine⋅HCl), and dietary energy density on commercial finishing pig growth performance and carcass characteristics