Rendimiento de vacas lactantes alimentadas con ensilaje de caña de azúcar tratadas con aditivos microbianos
DOI:
https://doi.org/10.17533/udea.rccp.v35n1a02Palabras clave:
vaca, digestibilidad, consumo de materia seca, Holandés, Lactobacillus buchneri, Lactobacillus plantarum, aditivos microbianos, inoculantes microbianos, producción de leche, Pediococcus pentosaceus, forrajeResumen
Antecedentes: No existen estudios que evalúen la adición de Lactobacillus plantarum y Pediococcus pentosaceus en el ensilaje de caña de azúcar para vacas lactantes. Objetivo: Evaluar dietas con diferentes forrajes y ensilajes con y sin inoculantes microbianos sobre el consumo, digestibilidad y producción láctea de vacas de mediana producción. Metodología: Quince vacas Holstein se distribuyeron en un diseño de bloques al azar. Los tratamientos fueron: 1) dieta con ensilaje de maíz (CS), 2) dieta con caña de azúcar fresca (SC), 3) dieta con ensilaje de caña sin inoculantes (SS), 4) dieta con ensilaje de caña de azúcar ensilada con Lactobacillus buchneri (SSLB), y 5) dieta con ensilaje de caña de azúcar ensilada con Lactobacillus plantarum y Pediococcus pentosaceus (SSLP). Resultados: El consumo de materia orgánica digestible fue menor (p<0,05) en la dieta SSLB (9,77 kg day-1) en comparación con CS (13,29 kg dia-1) y SSLP (12,42 kg dia-1). El ensilaje de caña de azúcar promovió un mayor consumo de fibra detergente neutra (NDF) en comparación con SC (promedio de 6,00 kg dia-1 versus 4,97 kg dia-1; p<0,05). La digestibilidad de la materia seca fue mayor (p<0,05) para la dieta CS (77,80%) en comparación con las dietas con ensilaje de caña de azúcar, mientras que la digestibilidad de la NDF fue menor para las dietas a base de caña de azúcar (p<0,05). La producción de leche fue similar entre CS (27,99 kg), SC (25,59 kg) y ensilajes con aditivos (25,47 y 27,07 para SSLB y SSLP, respectivamente). Las vacas alimentadas con ensilaje de maíz produjeron más leche corregida por grasa (25,89 kg) que las alimentadas con dietas a base de caña de azúcar (p<0,05). Conclusión: La caña de azúcar fresca o ensilada con aditivos se puede utilizar como fuente de forraje para vacas que producen hasta 23,43 kg d-1 leche corregida por grasa, siempre que la dieta total esté equilibrada adecuadamente.
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