Feed additives affect pork quality and shelf-life from pigs fed ethanol co-products and pork subject to three storage methods
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[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Two experiments were performed to determine the effect of corn distiller's dried grains with solubles on meat quality when fed at two different inclusion levels, as well as to investigate the effectiveness of specific feed additives in mitigating any possible quality issues following long-term storage. In the first experiment, the shelf-life of fresh pork from finishing pigs fed 20% distiller's dried grains with solubles (DDGS), ractopamine hydrochloride, and conjugated linoleic acid was evaluated. Pork loins were portioned into one of three storage conditions for a specified amount of time and then placed on retail display. Inclusion of conjugated linoleic acid aided in mitigating effects of DDGS. Storage method altered color values regardless of diet (P < 0.05), but effects of storage method x diet treatment interaction were minimal. In Experiment 2, the shelf-life of fresh pork from finishing pigs fed 50% DDGS, a chelated trace mineral, and a dietary antioxidant was evaluated following the same methodology as Experiment 1. Inclusion of 50% DDGS decreased carcass performance measures of HCW and LEA (P < 0.05). Overall, addition of a chelated trace mineral and a dietary antioxidant did not affect carcass performance, or shelf-life characteristics of fresh pork following storage. Results of these studies indicate DDGS can be fed at 20% or 50% levels with minimal impact on meat quality, however 50% DDGS may not be cost effective due to decreases in carcass performance.
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