Effect of intensive fattening of bulls fed a high-grain diet on selected health indicators
2006
Stercova, E.(Veterinarni a Farmaceuticka Univ., Brno (Czech Republic). Ustav Vyzivy, Zootechniky a Zoohygieny) E-mail:[email protected] | Haas, D.(Veterinarni a Farmaceuticka Univ., Brno (Czech Republic). Ustav Vyzivy, Zootechniky a Zoohygieny) | Krasa, A.(Veterinarni a Farmaceuticka Univ., Brno (Czech Republic). Ustav Vyzivy, Zootechniky a Zoohygieny) | Lepkova, R.(Veterinarni a Farmaceuticka Univ., Brno (Czech Republic). Ustav Vyzivy, Zootechniky a Zoohygieny) | Sterc, J.(Veterinarni a Farmaceuticka Univ., Brno (Czech Republic). Ustav Vyzivy, Zootechniky a Zoohygieny)
Eighteen experimental Czech Pied bulls were fed a diet containing from 75.0% to 83.6% concentrate and 18 control Czech Pied bulls were fed a mixed ration based on maize silage. Rumen fermentation, acid-base balance and selected biochemical indicators were evaluated during the fattening period. Samples of cancellous tissue from tuber coxae were collected after the slaughter. Among the studied variables, rumen fermentation was the most affected by the high-grain diet. Lower rumen fluid pH, lower counts of infusoria, higher total titration activity, higher total level of VFA and propionate proportion, and a lower acetate proportion was observed in experimental vs control bulls. Serum AST and P levels were increased, but the differences were not significant in most cases. Ca concentrations in the cancellous tissue of tuber coxae were significantly lower in experimental than in control bulls.
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