| Response of barrows to space allocation and ractopamine. | |
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MedLine Citation:
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PMID: 15542485 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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An experiment using 264 crossbred barrows was conducted to examine the interaction between space allocation and dietary ractopamine addition on pig performance and carcass characteristics using a 2 x 2 factorial arrangement of treatments. Treatments were 0.55 (19 pigs per pen) or 0.74 (14 pigs per pen) m2/pig from start (29.7 +/- 0.1 kg BW) to slaughter (108 kg BW) in a fully slatted facility and 0 or 10 ppm (as-fed basis) ractopamine for 28 d before slaughter. There were few treatment interactions. Pigs given 0.55 m2/pig had a lower ADG (P = 0.010), ADFI (P = 0.088), 10th-rib backfat depth on d 86 (P = 0.010), and carcass loin muscle depth (P = 0.011) than pigs given 0.74 m2/pig. There was no difference in feed conversion (P = 0.210) as a result of space allocation. Pigs fed diets containing 10 ppm ractopamine had decreased (P = 0.004) ADFI and improved (P = 0.001) feed conversion efficiencies for the 28-d feeding period, along with greater loin depth (P = 0.005) and carcass lean percent (P = 0.001). The improvements in 28-d carcass lean growth associated with feeding 10 ppm ractopamine resulted in an improvement in overall daily fat-free lean gain (P = 0.046). Under these experimental conditions, the response to dietary ractopamine was similar for crowded and uncrowded pigs. |
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Authors:
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M C Brumm; P S Miller; R C Thaler |
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Publication Detail:
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Type: Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of animal science Volume: 82 ISSN: 1525-3163 ISO Abbreviation: J. Anim. Sci. Publication Date: 2004 Nov |
Date Detail:
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Created Date: 2004-11-15 Completed Date: 2006-07-27 Revised Date: 2006-11-15 |
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: 3373-9 Citation Subset: IM |
Affiliation:
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Haskell Agricultural Laboratory, University of Nebraska, Concord 68728, USA. mbrumm1@unl.edu |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adrenergic beta-Agonists
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administration & dosage,
pharmacology* Animal Feed Animals Body Composition / drug effects Crowding* Diet Housing, Animal* Male Phenethylamines / administration & dosage, pharmacology* Swine / growth & development* |
| Chemical | |
Reg. No./Substance:
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0/Adrenergic beta-Agonists; 0/Phenethylamines; 97825-25-7/ractopamine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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