Utilización de granos secos de destilería de sorgo más solubles en terneros destetados precozmente
DOI:
https://doi.org/10.31285/AGRO.28.981Palabras clave:
granos de destilería, terneros, crecimiento, eficienciaResumen
Se evaluó el efecto de la alimentación de terneros de destete precoz con granos secos de destilería de sorgo más solubles (SDDGS) utilizados como fuente de energía y proteína en una dieta a base de sorgo grano. Veinticuatro terneros castrados (84,6 ± 11,0 kg) fueron asignados al azar a cuatro raciones que diferían en la concentración de SDDGS (0, 130, 260 o 390 g/kg, base seca), donde el SDDGS reemplazó una mezcla de sorgo grano (420 g/kg) y harina de soja (580 g/kg) para similar aporte de proteína cruda (185 g/kg) y energía metabolizable (12,1 MJ/kg) entre las raciones. Los animales se alimentaron individualmente ad libitum en tres comidas diarias, durante 70 días. Mayor SDDGS en la dieta aumentó linealmente el consumo de materia seca (MS), fibra y grasa (P < 0,01), sin afectar el consumo de nitrógeno o la digestibilidad de MS (P > 0,10). No se observó efecto (P > 0,10) en la ganancia de peso (1,13 kg/d, EE 0,05) o peso final (160,0 kg, EE 8,8), pero sí se redujo linealmente la eficiencia de ganancia (EG= −0,0012 × + 0,2679; P < 0,01). No se detectaron diferencias en la actividad de consumo, descanso o rumia (P > 0,10). La energía neta (EN) observada en la dieta de control estuvo por debajo del valor esperado basado en los estándares de alimentación; a medida que el SDDGS reemplazó una mayor proporción de sorgo y harina de soja en la dieta de control, la EN de la dieta disminuyó linealmente (P<0.01). La tasa de reemplazo más alta redujo 15% y 20% la EN para el mantenimiento y la ganancia de peso, respectivamente.
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