Efecto de la forma de distribución de concentrado y paja (por separado o en forma de mezcla) sobre la fermentación ruminal en terneros de cebo intensivo

• A. Gimeno ^[1] ; A. Al Alami ^[1] ; S. Schauf ^[1] ; A. de Vega ^[1] ; M. Fondevila ^[1] ; C. Castrillo ^[1]
  1. [1] Universidad de Zaragoza

     Universidad de Zaragoza

     Zaragoza, España

     
• Localización: XVI Jornadas sobre Producción Animal: 19 y 20 de mayo de 2015, Zaragoza / Javier Álvarez Rodríguez (aut.), Begoña Panea Doblado (aut.), Jorge Hugo Calvo Lacosta (aut.), Mireia Blanco Alibés (aut.), José Alfonso Abecia Martínez (aut.), Daniel Villalba Mata (aut.), María Ángeles Latorre Górriz (aut.), Vol. 1, 2015, ISBN 978-84-606-7969-1, págs. 221-223
• Idioma: español
• Títulos paralelos:
  • Effect of the distribution form of concentrate and straw (separately or as total mixed ration) on ruminal fermentation of beef calves fed high-grain diets
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• Resumen

  • The effect of offering the concentrate and the straw separately (separate) or together as a total mixed ration (TMR) on rumen fermentation (rumen pH and ammonia, lactic acid and volatile fatty acid – VFA – concentrations) and feed intake pattern of ten intensively reared calves was studied in a two 42-day periods experiment, following a change-over arrangement. The proportion of straw included in total mixed ration on each period varied from 8 to 10%, according to previous experiments. No differences on feed intake pattern were promoted (11.19 vs. 10.74 kg FM for separate and TMR distribution, respectively, P>0.10), although separate distribution reduced the intake of straw (5 and 7% in first and second period). Animals fed the total mixed ration showed a more buffered rumen fermentation, characterised by higher daily mean rumen pH (6.09 vs. 5.87, P<0.001),ammonia concentration (110 vs. 89.0 mg/l, P<0.001) and acetic to propionic ratio (1,52 vs.1.07, P<0.001) and lower total VFA concentration (92.9 vs 104 mmol/l, P=0.008), as well as less observations indicative of acidosis – pH<5.6 (14 vs. 37%) and total VFA>150mM (6.3 vs. 9.4%) – compared to those fed the concentrate and straw separately. In view of the results, feeding the diet as a total mixed ration might be interesting to prevent acidosis.