Resumen de Cebo de terneros con unifeed o pienso y paja: Efecto sobre el rendimiento y el ambiente ruminal
Raquel Posado Ferreras, Raúl Bodas Rodríguez, María José Tabernero de Paz Risueño, D.J. Bartolomé, P. Herraiz, J.J. García
Two groups of seven Avileña-Negra Ibérica calves (270±22,6 kg and 7±0,5 months) received either concentrate from hoppers (PIENSO) or maize silage based unifeed from bunk feeder (UNIFEED). Each bull calf wore a wireless intraruminal pH and temperature probe for the last 19 days before slaughter. This probe recorded pH and temperature values every 10 min. Animals were slaughter at 13 months of age (525±8,8 kg). Diet did not affect (P>0.10) final live weight, average daily gain, carcass weight or dressing percentage. Diet tended to affect (P<0.01) mean and minimum daily pH, PIENSO animals showing the greatest values. Maximum pH and temperature (mean, maximum and minimum) resulted unaffected by diet. Feed delivery may become more important than feed composition to determine ruminal pH and the associated risk of acidosis.
