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

Jerilyn E. Hergenreder; Jonathon L. Beckett; Zachary K. Smith; Bradley J. Johnson

doi:10.3844/ajavsp.2021.99.104

Article Details

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

Authors:

Jerilyn E. Hergenreder | Jonathon L. Beckett | Zachary K. Smith | Bradley J. Johnson

Publisher:

Science Publications

Journal:

American Journal of Animal and Veterinary Sciences Vol.16 Issue 1, pp.99-104

Document Type:

Article

Publication Date:

3/2021

Document Language:

English

Document ID (Org No.):

2001396619

pISSN:

1557-4563

DOI:

10.3844/ajavsp.2021.99.104

Keywords:

Abstract:

 The 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.

Article Details

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

Authors:

Jerilyn E. Hergenreder | Jonathon L. Beckett | Zachary K. Smith | Bradley J. Johnson

Publisher:

Science Publications

Journal:

American Journal of Animal and Veterinary Sciences Vol.16 Issue 1, pp.99-104

Document Type:

Article

Publication Date:

3/2021

Document Language:

English

Document ID (Org No.):

2001396619

pISSN:

1557-4563

DOI:

10.3844/ajavsp.2021.99.104

Beta-Adrenergic Agonist

Carcass Grade

Feedlot Growth Performance

Holstein Steer

Ractopamine Hydrochloride

Issues

Article Details

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

Authors: Jerilyn E. Hergenreder | Jonathon L. Beckett | Zachary K. Smith | Bradley J. Johnson

Publisher: Science Publications

Journal: American Journal of Animal and Veterinary Sciences Vol.16 Issue 1, pp.99-104

Document Type: Article

Publication Date: 3/2021

Document Language: English

Document ID (Org No.): 2001396619

pISSN: 1557-4563

DOI: 10.3844/ajavsp.2021.99.104

Beta-Adrenergic Agonist

Carcass Grade

Feedlot Growth Performance

Holstein Steer

Ractopamine Hydrochloride

Issues

Authors:

Jerilyn E. Hergenreder | Jonathon L. Beckett | Zachary K. Smith | Bradley J. Johnson

Publisher:

Science Publications

Journal:

American Journal of Animal and Veterinary Sciences Vol.16 Issue 1, pp.99-104

Document Type:

Article

Publication Date:

3/2021

Document Language:

English

Document ID (Org No.):

2001396619

pISSN:

1557-4563

DOI:

10.3844/ajavsp.2021.99.104