A Greater dose of Ractopamine Hydrochloride Enhances Feedlot Performance and Impacts Carcass Characteristics of Calf-Fed Holstein Steers

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dc.creatorHergenreder, Jerilyn E.
dc.creatorBeckett, Jonathon L.
dc.creatorSmith, Zachary K.
dc.creatorJohnson, Bradley J.
dc.date.accessioned2021-08-11T21:57:03Z
dc.date.available2021-08-11T21:57:03Z
dc.date.issued2021
dc.description© 2021 Jerilyn E. Hergenreder, Jonathon L. Beckett, Zachary K. Smith and Bradley J. Johnson. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.en_US
dc.description.abstractThe objective was to evaluate the effects of supplementing ractopamine HCl at the rate of 400 mg steer1 daily in the final 28 d of the feeding period on growth performance and carcass characteristics of Holstein steers. Steers (n = 1,498; initial BW = 547 kg) were randomly assigned to pens (10 pens/treatment) and to a treatment: (1) 0 mg∙steer1∙d1 of RH (CON); (2) Ractopamine HCl fed at 400 mg∙steer1∙d1 of RH (RH) for evaluation over a 28 d period. Steers were fed a finishing diet based on steam-flaked corn and alfalfa hay. Dry matter intake decreased, Average Daily Gain (ADG) was increased and improved feed efficiency (P<0.05) was noted in RH steers. Steers supplemented with RH had heavier final Body Weight (BW) and HCW, greater Dressing Percentage (DP) and larger Longissimus Muscle (LM) area (P<0.05). Ractopamine HCl steers had improved yield grades, as evidenced by a greater percentage of yield grade 1 and a decreased percentage of yield grade 3 (P<0.05) carcasses. Steers supplemented RH had a decreased percentage of cattle grading USDA Choice and a greater percent grading USDA Select (P<0.05). These data indicate that 400 mg∙steer1 daily of ractopamine HCl fed to Holstein steers may improve feedlot phase growth performance, DP, HCW and LM area while having minimal impact on USDA quality grade distribution.en_US
dc.identifier.citationHergenreder, J. E., L. Beckett, J., K. Smith, Z. & J. Johnson, B. (2021). A Greater dose of Ractopamine Hydrochloride Enhances Feedlot Performance and Impacts Carcass Characteristics of Calf-Fed Holstein Steers. American Journal of Animal and Veterinary Sciences, 16(1), 99-104. https://doi.org/10.3844/ajavsp.2021.99.104en_US
dc.identifier.urihttps://doi.org/10.3844/ajavsp.2021.99.104
dc.identifier.urihttps://hdl.handle.net/2346/87617
dc.language.isoengen_US
dc.subjectBeta-Adrenergic Agonisten_US
dc.subjectCarcass Gradeen_US
dc.subjectFeedlot Growth Performanceen_US
dc.subjectHolstein Steeren_US
dc.subjectRactopamine Hydrochlorideen_US
dc.titleA Greater dose of Ractopamine Hydrochloride Enhances Feedlot Performance and Impacts Carcass Characteristics of Calf-Fed Holstein Steersen_US
dc.typeArticleen_US

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