DOI: 10.17151/vetzo.2017.11.1.4
Cómo citar
Vélez-Ruiz J. P., Tequin-Ocampo E. B., & Vargas Sánchez J. E. (2017). Efecto in vitro del aceite de girasol (Helianthus annuus L.) sobre ácido transvacénico y patrón de ácidos grasos de cadena larga en la digesta rumina . Revista Veterinaria y Zootecnia (On Line), 11(1), 37 - 53. https://doi.org/10.17151/vetzo.2017.11.1.4

Autores/as

Juan Pablo Vélez-Ruiz
Universidad de Calda
a@a.com
Elsa Beatriz Tequin-Ocampo
Universidad de Caldas
a@a.com
Julio Ernesto Vargas Sánchez
Universidad de Caldas,
jvargas@ucaldas.edu.co

Resumen

La adición de aceites vegetales ricos en ácidos grasos de cadena larga (AGCL) a las dietas para rumiantes se ha propuesto como alternativa para disminuir las emisiones de metano (CH4) y aumentar los niveles de ácido linoleico conjugado (ALC) en la leche y la carne, que está mediado por la producción a ácido transvacénico (ATV) en el rumen. El objetivo de este estudio fue evaluar el efecto de la adición de aceite de girasol en proporciones de 0%, 1% y 3% (con base en MS) a substratos de fermentaciónin vitro (técnica de producción de gas): pasto Kikuyo (Pennisetum clandestinum) o pasto Ryegrass (Lolium perenne), sobre la cinética de producción de gas, la producción de CH4, la concentración de ácidos grasos volátiles (AGV), la producción de ALC y ATV y otros ácidos grasos de cadena larga (AGCL). La adición de aceite de girasol (1% y 3%) no disminuyó la producción de gas (A) ni la tasa de producción de gas (c); sin embargo, sí aumentó el tiempo de retardo en el inicio de la producción de gas (0,042, 0,425 y 0,564 h para control, 1% y 3%, respectivamente; P<0,001). La adición de aceites tampoco redujo la producción de CH4. No obstante, la adición de aceite incrementó ligeramente el porcentaje de ácido propiónico (22,0, 22,5 y 22,6% para control, 1% y 3%, respectivamente; P<0,05). La proporción de ácido linoleico conjugado (ALC) no varió como consecuencia de la adición de aceite, pero la proporción de ácido transvacénico (ATV) sí se incrementó significativamente en respuesta a la adición el aceite (13,4, 16% y 21,8% para control, 1% y 3%, respectivamente; P<0,01). La inclusión de aceite de girasol a niveles del 1 y 3% sobre la materia seca aumentó la producción de ATV a nivel ruminal sin afectar negativamente las variables que caracterizan la fermentación ruminal.

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