Partial replacement of corn with glycerin: digestibility and ruminal fermentation kinetics by in vitro gas production

Vanessa Peripolli; Ênio R Prates; Júlio OJ Barcellos; João Batista G Costa Jr; Rúbia B Lopes; Claudia M Camargo

doi:10.17533/udea.rccp.325014

Autores/as

Vanessa Peripolli Universidade Federal do Rio Grande do Sul. NESPRO/UFRGS
Ênio R Prates Universidade Federal do Rio Grande do Sul
Júlio OJ Barcellos Universidade Federal do Rio Grande do Sul
João Batista G Costa Jr Universidade Federal do Rio Grande do Sul
Rúbia B Lopes Universidade Federal do Rio Grande do Sul
Claudia M Camargo Universidade Federal do Rio Grande do Sul

DOI:

https://doi.org/10.17533/udea.rccp.325014

Palabras clave:

co-producto del biodiese, energía, factor de partición, fibra detergente neutra, modelo logístico bicompartimenta

Resumen

una alternativa al uso de la glicerina, generada como residuo de la producción de biodiesel, es su utilización en la alimentación animal. Objetivo: evaluar los efectos de la sustitución parcial de maíz con glicerina sobre la digestibilidad de la dieta y la cinética de la fermentación ruminal, usando la técnica de producción de gas in vitro. Métodos: los tratamientos consistieron en la substitución de maíz por glicerina cruda (0, 4, 8 y 12% en base seca). La digestibilidad in vitro de la fibra detergente neutra y la materia orgánica fue calculada por la diferencia entre la cantidad del sustrato incubado y el no digerido. La presión acumulativa de gas in vitro fue medida por un equipo automático. La cinética de la producción de gas fue analizada empleando un modelo logístico bicompartimental. Resultados: la inclusión de niveles crecientes de glicerina en substitución del maíz no afectó la digestibilidad in vitro de la fibra detergente neutra, la materia orgánica, la tasa de nitrógeno amoniacal o las tasas de degradación. Se observó un efecto lineal negativo en el factor de partición y un aumento lineal en la fracción de rápida degradación por la inclusión de glicerina. Conclusión: la inclusión dietaria de hasta 12% de glicerina (base seca) para reemplazar al maíz no afectó la digestibilidad de la misma. Se observó una mayor producción de gas con el mayor nivel de inclusión de glicerina, lo que indica que la combinación de heno de alfalfa, maíz y glicerina podría alterar la fermentación, lo que sugiere la existencia de efectos asociativos.

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Biografía del autor/a

Vanessa Peripolli, Universidade Federal do Rio Grande do Sul. NESPRO/UFRGS

Programa de Pós-Graduação em Zootecnia, NESPRO/UFRGS

Citas

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