کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2454280 | 1110381 | 2007 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Meta-Analysis of the Ractopamine Response in Finishing Swine
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
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چکیده انگلیسی
Ractopamine HCl (RAC) is a phenethanolamine β-adrenergic agonist used as a feed supplement that repartitions nutrients from fat deposition to increased protein synthesis and muscle protein accretion without deleteriously affecting pork quality. This literature review, as well as meta-analyses of the available results, was undertaken to evaluate the live performance, carcass, and pork quality responses to the various dietary inclusion levels (0, 5, 10, and 20 mg/kg) of RAC. Consensus of literature and meta-analysis indicated that pigs fed RAC, regardless of dietary inclusion level, gained faster (P < 0.001) and more efficiently (P < 0.001) and produced heavier (P = 0.024), more muscular (P < 0.001) carcasses than pigs fed untreated control diets. Furthermore, carcasses from pigs fed diets containing 10 and 20 mg/kg (but not 5) of RAC were trimmer (P < 0.001) and had greater percentages of fat-free lean (P < 0.001) than carcasses of untreated controls. The literature indicates that dietary RAC has no deleterious effects on fresh pork color, firmness, and water-holding capacity; and, although some studies have noted a reduction in marbling, i.m. fat content, or both, meta-analysis of the available information reveals that RAC does not (P = 0.994) alter marbling or i.m. fat content. Inclusion of RAC in swine finishing diets will, therefore, effectively improve performance and carcass compositional attributes that are economically relevant to today's swine producers.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Professional Animal Scientist - Volume 23, Issue 3, June 2007, Pages 179-196
Journal: The Professional Animal Scientist - Volume 23, Issue 3, June 2007, Pages 179-196
نویسندگان
J.K. Apple, P.J. Rincker, F.K. McKeith, S.N. Carr, T.A. PAS, P.D. Matzat,