Effect of Ractopamine Hydrochloride on Growth Performance and Carcass Traits in Calf-Fed and Yearling Holstein Steers Fed to Slaughter

Vogel, G. J.; Duff, G. C.; Lehmkuhler, J. W.; Beckett, J.L.; Drouillard, James S.; Schroeder, Alice; Platter, W. J.; Koevering, M.T. Van; Laudert, S.B.

doi:10.15232/s1080-7446(15)30675-6

Cited by 19 publications

(30 citation statements)

References 6 publications

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“…This increase in productivity of cattle fed a β-agonist has been previously reported by Capper and Hayes (2012). Results from the current study are similar to efficiencies reported by Bass et al (2009), and Vogel et al (2009, who collectively reported greater final BW (3.5 to 13.4 kg increase), an increase in ADG (0.03 to 0.24 kg/d), and an increase in G:F (0.007 to 0.024) of calf-fed Holstein steers fed a β-agonist compared to cattle that were not fed a β-agonist.…”

Section: Feeding Performancesupporting

confidence: 91%

“…Each value is the mean of 4 composites collected monthly. Beckett et al (2009), Vogel et al (2009), and Lawrence et al (2011, who collectively reported increased HCW (3.1 to 17.2 kg), dressed yield (-0.07% to 1.56%), and LM area (1.7 to 8.9 cm2) and decreased USDA calculated YG (0.06 to 0.34 units) of calf-fed Holstein steers fed a β-agonist compared to steers not fed a β-agonist. Calffed Holstein steers fed ZH have been shown to increase the dorsal-ventral dimensions of the LM, resulting in a plumper LM compared to the typical angular LM in calffed Holstein steers not supplemented ZH (Lawrence et al, 2011).…”

Section: Carcass Characteristicsmentioning

confidence: 99%

“…Previous research has shown that calf-fed Holstein steers fed either ZH or RH had increased feed efficiency (G:F), ADG, dressing percentage, carcass weight, and LM area (Bass et al, 2009;Beckett et al, 2009;Vogel et al, 2009). Although individual analyses of ZH and RH have been conducted, limited data have evaluated the comparative effects of these additives on calf-fed Holstein steer performance and carcass characteristics.…”

Section: Introductionmentioning

confidence: 99%

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Comparative effects of zilpaterol hydrochloride and ractopamine hydrochloride on live performance and carcass characteristics of calf-fed Holstein steers12

Brown

Sexten

Lawrence

et al. 2014

Journal of Animal Science

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Holstein steers (n = 2,275) were assigned to 1 of 3 treatments: 1) a control diet containing no β-agonists, 2) a diet that contained zilpaterol hydrochloride (ZH; 8.3 mg/kg [100% DM basis]) for 20 d with a 3-d withdrawal period before harvest, and 3) a diet that contained ractopamine hydrochloride (RH; 30.1 mg/kg [100% DM basis]) for 28 d before harvest. No differences (P ≥ 0.18) were detected between treatments for initial BW, BW at d 28, or DMI. Final BW, BW gain for the last 28 d, total BW gain, ADG for the last 28 d, and overall ADG were greater (P < 0.05) for steers fed ZH or RH than for steers fed the control diet. Additionally, G:F for the last 28 d and G:F for the entire trial was increased (P < 0.02) for steers fed ZH (0.147, 0.147) or RH (0.153, 0.151) compared to steers fed the control diet (0.134, 0.143), respectively. Steers fed ZH or RH had HCW that were 15.5 and 8.2 kg heavier (P ≤ 0.01) and LM areas that were 7.1 and 2.3 cm 2 larger (P < 0.01) than control cattle. Steers fed ZH also had dressed carcass yields that were 1.3% to 1.5% greater and USDA calculated yield grades that were decreased 0.16 to 0.23 units compared to RH and control steers. No differences (P ≥ 0.39) were found between treatments for marbling score, fat thickness, and percentage KPH. Steers fed ZH had an increased (P ≤ 0.04) percentage of yield grade 1 and 2 carcasses (15.1, 55.0) and a reduced (P ≤ 0.02) percentage of yield grade 3 carcasses (27.1) compared with those fed RH (10.5, 49.1, 36.1) or the control diet (9.0, 47.4, 36.4), respectively. Additionally, ZH-fed steers had a decreased (P ≤ 0.04) percentage of yield grade 4 and 5 carcasses (2.8) compared with steers fed the control diet (6.9). Steers fed ZH had an increased (P ≤ 0.01) percentage of USDA Select grading carcass (31.0%) and a decreased (P ≤ 0.01) percentage of USDA Choice grading carcasses (65.0%) compared with steers fed RH (25.8%, 70.2%) and no β-agonist (24.8%, 72.0%), respectively. Feeding either β-agonist to calf-fed Holstein steers increased live performance through increased BW, BW gain, and ADG. Furthermore, supplementing calf-fed Holstein steers with ZH provides greater improvements in HCW, LM area, and yield grade components, with a slight decrease in quality grade when compared to calf-fed Holstein steers supplemented with RH.

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Section: Feeding Performancesupporting

confidence: 91%

Section: Carcass Characteristicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparative effects of zilpaterol hydrochloride and ractopamine hydrochloride on live performance and carcass characteristics of calf-fed Holstein steers12

Brown

Sexten

Lawrence

et al. 2014

Journal of Animal Science

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“…A grande variabilidade das doses pode ter interferido nos resultados. Trabalhos comparando doses de ractopamina (VoGel et al, 2009;Bryant et al, 2010;Boler et al, 2012) verificaram que esta possui influência no ganho de peso diferencial, não alterando o consumo alimentar e consequentemente alterando a eficiência alimentar. Nenhum dos trabalhos citados comparou diferentes doses de zilpaterol na mesma categoria animal.…”

Section: Efeitos No Desempenho De Bovinos De Corteunclassified

Agonistas beta-adrenérgicos como aditivo para bovinos de corte

et al. 2014

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RESUMO: Os receptores de agonistas beta-adrenérgicos (β-AA) estão presentes em praticamente todos os tipos de células de mamíferos e são estimulados pelas catecolaminas (adrenalina e noradrenalina) produzidas pelo próprio organismo. Os agonistas β-AA são substâncias sintéticas com estrutura similar a estas aminas. Quando fornecidos na ração alteram a composição corporal dos animais, afetando a repartição dos nutrientes em favor da deposição proteica e diminuindo a lipogênese. Apesar dos mecanismos de ação não serem completamente entendidos, estes podem causar alterações morfofisiológicas, tais como o aumento do fluxo sanguíneo, a diminuição do nível plasmático de insulina, a diminuição da lipogênese e a hipertrofia muscular principalmente nas fibras do tipo II. Observam-se também alterações na motilidade do trato gastrointestinal e secreções, além da influência direta sobre as bactérias do rúmen, podendo alterar a digestibilidade da dieta. Os agonistas β-AA liberados em alguns países para utilização em bovinos de corte são o Cloridrato de Ractopamina e o Cloridrato de Zilpaterol. De acordo com dados de literatura, a inclusão destes aditivos na dieta de bovinos confinados tem sido relacionada com aumento na eficiência alimentar e ganho de peso diário, e igual ou menor consumo de ração. Nas características de carcaça tem sido observado aumento no peso das carcaças, e aumento da área de olho de lombo, porém com possibilidade de diminuição da espessura de gordura subcutânea e de marmoreio. Avaliações em painel sensorial da carne de animais consumindo agonistas β-AA mostraram diminuição na maciez, com igual ou menor suculência. Os agonistas β-AA melhoram o desempenho e as características de carcaça, porém mais estudos são necessários para comprovar se possuem influência negativa nas características organolépticas da carne.Palavras-chaves: novilhos, ractopamina, terminação, zilpaterol. BETA-ADRENERGIC AGONISTS AS ADDITIVE IN BEEF CATTLEABSTRACT: The agonists receptor beta-adrenergic (β-AA) are present in virtually all types of mammalian cells and are stimulated by catecholamines (epinephrine and norepinephrine) produced by the organism itself. The β-AA agonists are synthetic substances with similar structure to these amines. When provided in the diet they alter the body composition of animals, affecting the distribution of nutrients toward to protein deposition, and decreasing lipogenesis. Although the mechanisms of action are not fully understood, these may cause morphological and physiological changes such as increased blood flow decrease in plasma insulin, decreased lipogenesis, and muscle hypertrophy mainly in type II fibers. We also observed changes in motility and secretions grastointestinal tract, beyond the direct influence on the rumen bacteria, altering the digestibility of the diet. The β-AA agonists released in some countries for use in beef cattle are ractopamine hydrochloride and zilpaterol hydrochloride. According to literature data, the inclusion of these additives in the diet of feedlot cattle has bee...

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“…Effects on carcass characteristics from cattle fed ZH and RH include increased rib eye area (REA), increased hot carcass weight (HCW), increased dressing percent (DP), reduced yield grade, and a reduction in tenderness (Beckett et al, 2009;Holmer et al, 2009;Vogel et al, 2005).…”

Section: Carcass Effectsmentioning

confidence: 99%

Effect of feeding Zilpaterol hydrochloride for 20 days to calf-fed Holstein steers with a 3 or 10 day withdrawal period antemortem on carcass characteristics and tenderness

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Effect of Ractopamine Hydrochloride on Growth Performance and Carcass Traits in Calf-Fed and Yearling Holstein Steers Fed to Slaughter

Cited by 19 publications

References 6 publications

Comparative effects of zilpaterol hydrochloride and ractopamine hydrochloride on live performance and carcass characteristics of calf-fed Holstein steers12

Comparative effects of zilpaterol hydrochloride and ractopamine hydrochloride on live performance and carcass characteristics of calf-fed Holstein steers12

Agonistas beta-adrenérgicos como aditivo para bovinos de corte

Effect of feeding Zilpaterol hydrochloride for 20 days to calf-fed Holstein steers with a 3 or 10 day withdrawal period antemortem on carcass characteristics and tenderness

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