Effects of glycerol and ractopamine hcl (paylean) on growth performance, carcass characteristics, and loin quality of finishing pigs

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dc.contributor.author Duttlinger, A.W.
dc.contributor.author Tokach, Michael D.
dc.contributor.author Dritz, Steven S.
dc.contributor.author Houser, Terry A.
dc.contributor.author Prusa, K.J.
dc.contributor.author DeRouchey, Joel M.
dc.contributor.author Nelssen, Jim L.
dc.contributor.author Goodband, Robert D.
dc.date.accessioned 2009-10-06T20:24:53Z
dc.date.available 2009-10-06T20:24:53Z
dc.date.issued 2009-10-06T20:24:53Z
dc.identifier.uri http://hdl.handle.net/2097/1790
dc.description.abstract A total of 1,054 barrows and gilts (PIC, initially 207.8 lb) were used in a 28-d study to determine the influence of glycerol and ractopamine HCl (Paylean) on growing-finishing pig performance, carcass characteristics, and loin quality. The experiment was conducted in a commercial swine research facility in southwest Minnesota. Pigs were blocked by weight and randomly allotted to 1 of 4 dietary treatments with 10 replications per treatment. Pigs were fed corn-soybean meal-based diets. Dietary treatments were arranged in a 2 × 2 factorial with main effects of glycerol (0 or 5%) and ractopamine HCl (0 or 6.75 g/ton). Overall (d 0 to 28), there were no glycerol × ractopamine HCl interactions (P > 0.10) observed for growth performance. Pigs fed dietary glycerol had improved (P < 0.04) F/G, but ADG and ADFI (P > 0.40) were not affected. Pigs fed diets with added ractopamine HCl had improved (P < 0.01) ADG and F/G with a tendency (P > 0.08) for lower ADFI than pigs fed diets with no ractopamine HCl. For carcass characteristics, there were glycerol × ractopamine HCl interactions observed (P < 0.05) for percent yield and fat free lean index (FFLI). Adding either ractopamine HCl or glycerol to the control diet increased yield and FFLI; however, there were no additive effects when the combination of glycerol and ractopamine HCl was fed. Pigs fed ractopamine HCl had increased (P < 0.04) HCW, yield, loin depth, and FFLI. There was a glycerol × ractopamine HCl interaction (P < 0.01) observed for loin chop drip loss. Loin chop drip loss was numerically improved when glycerol and ractopamine HCl were added separately to the control diet; however, loin chop drip loss numerically decreased when the combination of glycerol and ractopamine HCl was fed. Glycerol did not affect (P > 0.22) loin characteristics. Ractopamine HCl tended to improve (P < 0.08) sirloin chop a* (redness) color. Neither ractopamine HCl nor glycerol influenced iodine value of belly fat, jowl fat, or backfat. In conclusion, pigs fed 5% glycerol had improved F/G, whereas pigs fed ractopamine HCl had improved growth and carcass characteristics and a tendency for improved loin a* color. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Swine day, 2008 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 09-074-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 1001 en_US
dc.subject Finishing pigs en_US
dc.subject Glycerol en_US
dc.subject Ractopamine HCl en_US
dc.title Effects of glycerol and ractopamine hcl (paylean) on growth performance, carcass characteristics, and loin quality of finishing pigs en_US
dc.type Conference paper en_US
dc.date.published 2008 en_US
dc.citation.epage 245 en_US
dc.citation.spage 236 en_US
dc.contributor.authoreid jderouch en_US
dc.contributor.authoreid mtokach en_US
dc.contributor.authoreid dritz en_US
dc.contributor.authoreid jnelssen en_US
dc.contributor.authoreid goodband en_US
dc.contributor.authoreid houser en_US

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