Effects of ractopamine HCl dose and treatment period on pig performance in a commercial finishing facility

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dc.contributor.author Main, R.G.
dc.contributor.author Dritz, Steven S.
dc.contributor.author Tokach, Michael D.
dc.contributor.author Goodband, Robert D.
dc.contributor.author Nelssen, Jim L.
dc.contributor.author DeRouchey, Joel M.
dc.date.accessioned 2012-04-06T20:35:38Z
dc.date.available 2012-04-06T20:35:38Z
dc.date.issued 2012-04-06
dc.identifier.uri http://hdl.handle.net/2097/13588
dc.description.abstract Objective: To evaluate effects of ractopamine HCl (RAC) dose and treatment period on growth performance and carcass composition in a commercial finishing environment. Materials and methods: In Experiment One, a total of 880 pigs (PIC L337 × C22; initially 106.5 ± 0.5 kg) were allotted to four treatments, including doses of 0, 5.0, 7.5, and 10.0 ppm of RAC for 21 days before slaughter. In Experiment Two, 1035 gilts (initially 103.2 ± 0.62 kg) were allotted to nine treatments. Treatments included doses of 5 or 10 ppm RAC for 7, 14, 21, or 28 days before slaughter and a control treatment without RAC. Results: In Experiment One, average daily gain (ADG), gain-to-feed ratio (G:F), and carcass yield increased (linear, P < .05) with increasing dose of RAC. The largest numeric differences were observed as RAC dose increased from 0 to 5 ppm. In Experiment Two, ADG and G:F were greater (P < .05) for pigs fed 5 ppm RAC for 14, 21, or 28 days and for pigs fed 10 ppm for all treatment periods than for control pigs. Carcass yield was greater in pigs fed 10 ppm RAC (P < .05) than in pigs fed 5 ppm RAC or in the controls. RAC dose (5 ppm versus 10 ppm) did not affect carcass lean measures (P > .16). Implications: Feeding RAC at 5 to 10 ppm for 14 to 28 days before slaughter increases ADG, G:F, and carcass yield of pigs reared in a commercial finishing environment. en_US
dc.rights Permission to archive granted by the Publications Manager of the American Association of Swine Veterinarians, April 14, 2011. en_US
dc.subject Swine en_US
dc.subject Ractopamine en_US
dc.subject Growth en_US
dc.subject Performance en_US
dc.title Effects of ractopamine HCl dose and treatment period on pig performance in a commercial finishing facility en_US
dc.type Article (publisher version) en_US
dc.date.published 2009 en_US
dc.citation.epage 139 en_US
dc.citation.issue 3 en_US
dc.citation.jtitle Journal of Swine Health and Production en_US
dc.citation.spage 134 en_US
dc.citation.volume 17 en_US
dc.contributor.authoreid dritz en_US
dc.contributor.authoreid mtokach en_US
dc.contributor.authoreid goodband en_US
dc.contributor.authoreid jnelssen en_US
dc.contributor.authoreid jderouch en_US

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