| Effects of implanting and feeding zilpaterol hydrochloride on performance, carcass characteristics, and subprimal beef yields of fed cows. | |
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MedLine Citation:
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PMID: 18820157 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Sixty crossbred cull cows were used to determine the combined effects of a trenbolone acetate-estradiol implant and feeding zilpaterol hydrochloride on performance, carcass characteristics, and subprimal yields of mature cows fed for 70 d. Cows were assigned to 1 of 5 treatments: 1) grazing native grass pasture (G); 2) concentrate-fed (C) a grain sorghum-sorghum silage diet; 3) concentrate-fed and implanted (CI) with Revalor-200 (trenbolone acetate-estradiol); 4) concentrate-fed and fed Zilmax (zilpaterol hydrochloride) beginning on d 38 of the feeding period (CZ); and 5) concentrate-fed, implanted, and fed Zilmax beginning on d 38 (CIZ). The concentrate diet consisted primarily of ground grain sorghum and sorghum silage. During the last 34 d of the feeding trial, concentrate-fed (C, CI, CZ, and CIZ) cows had greater (P < 0.05) gains than G cows. Hot carcass weights and dressing percentages were greater (P < 0.05) for the concentrate-fed cows than for G cows. Longissimus muscle area was largest (P < 0.05) for CIZ cows, whereas subprimal weights from the chuck were heavier (P < 0.05) from CIZ cows than C and G cows, and carcasses from CI and CZ cows had heavier (P < 0.05) chuck subprimal weights than G cows. Rib and round subprimal weights were heavier (P < 0.05) for concentrate-fed cows compared with G cows. In addition, carcasses from CIZ cows had heavier (P < 0.05) total subprimal weights, and total subprimals were a greater percentage of their initial BW than C cows. Rib cut-out and total soft tissue weights from the 9-10-11th rib were less (P < 0.05) for G cows than concentrate-fed cows. Feeding cull cows a concentrate diet increased carcass weight, dressing percentage, and subprimal yields compared with feeding cows a grass-based pasture diet, and the combination of a trenbolone acetate-estradiol implant and feeding zilpaterol hydrochloride can maximize trimmed beef yields from cull cows fed a high-concentrate diet. |
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Authors:
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S Neill; J A Unruh; T T Marston; J R Jaeger; M C Hunt; J J Higgins |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2008-09-26 |
Journal Detail:
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Title: Journal of animal science Volume: 87 ISSN: 1525-3163 ISO Abbreviation: J. Anim. Sci. Publication Date: 2009 Feb |
Date Detail:
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Created Date: 2009-01-26 Completed Date: 2009-04-01 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8003002 Medline TA: J Anim Sci Country: United States |
Other Details:
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Languages: eng Pagination: 704-10 Citation Subset: IM |
Affiliation:
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Department of Animal Sciences and Industry, Kansas State University, Manhattan 66506, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Body Composition / drug effects* Cattle / growth & development, physiology* Diet / veterinary* Drug Administration Routes / veterinary Drug Implants Female Meat / standards* Random Allocation Trimethylsilyl Compounds / administration & dosage, pharmacology* Weight Gain / drug effects |
| Chemical | |
Reg. No./Substance:
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0/Drug Implants; 0/Trimethylsilyl Compounds; 0/Zilpaterol |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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