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The effect of the β-adrenergic agonist cimaterol on performance and carcass and meat quality in culled dairy cows

Published online by Cambridge University Press:  02 September 2010

L. O. Fiems
Affiliation:
National Institute for Animal Nutrition, Agricultural Research Centre-Ghent, Scheldeweg 68, 9090 Melle-Gontrode, Belgium
Ch. V. Boucqué
Affiliation:
National Institute for Animal Nutrition, Agricultural Research Centre-Ghent, Scheldeweg 68, 9090 Melle-Gontrode, Belgium
D. L. de Brabander
Affiliation:
National Institute for Animal Nutrition, Agricultural Research Centre-Ghent, Scheldeweg 68, 9090 Melle-Gontrode, Belgium
B. G. Cottyn
Affiliation:
National Institute for Animal Nutrition, Agricultural Research Centre-Ghent, Scheldeweg 68, 9090 Melle-Gontrode, Belgium
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Abstract

Forty-eight culled dairy cows were assigned to one of two treatment groups to investigate the effect of a β-adrenergic agonist in mature cattle. They were finished during a 63-day period on a concentrate diet, containing 0 or 4 mg/kg cimaterol. No food was given in the 20 h prior to slaughter.

Cimaterol had no effect on food intake, but significantly improved food conversion efficiency and increased live-weight gain, carcass weight and dressing proportion (P < 0·05). Cimaterol induced muscle hypertrophy as evidenced by an improved EUROP carcass classification and a higher longissimus thoracis (LT) cross-sectional area (P < 0·001). EUROP fat score and fat content in the carcass and the LT were lowered (P < 0·05). Cimaterol resulted in brighter meat (higher L-value: 37·0 v. 35·6; P<0·05) with a higher shear force value (64·0 v. 46·4 Newton; P<0·01) compared with control animals. It seems likely that mature cattle receiving cimaterol respond similarly to younger growing animals.

Type
Research Article
Copyright
Copyright © British Society of Animal Science 1995

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