Obtención de leche bovina reducida en grasa saturada y naturalmente enriquecida en ácido linoleico conjugado

Resumen

El objetivo del trabajo fue reducir la presencia de los ácidos grasos (AG) saturados potencialmente aterogénicos (C12:0, C14:0 y C16:0) de la leche y aumentar la presencia del ácido linoleico conjugado (CLA) en vacas lecheras estabuladas alimentadas con ración completamente mezclada (RCM) a través del aporte suplementario de ácidos grasos poliinsaturados (AGPI). Se utilizaron dos lotes de 70 vacas multíparas en el primer tercio de lactancia. Luego de seis semanas experimentales y durante cinco días consecutivos se obtuvieron cinco muestras de leche estándar (LE) provenientes del tanque colector del lote vacas sin AGPI suplementarios, y cinco muestras de leche CLA (LCLA) provenientes del tanque de las vacas suplementadas con los AGPI. El tenor graso (g/100g) de la LE (3,84) resultó superior (p<0,001) al de LCLA (2,84) por reducción (17,21%) de los AG potencialmente aterogénicos. El índice aterogénico fue mayor (p<0,001) en la LE (4,07) comparado al de la LCLA (2,58). La concentración del CLA aumentó (p<0,001) un 122% en LCLA (0,77 g/100 g) respecto al valor registrado en LE (0,34 g/100 g). El ácido oleico (g/100 g) resultó superior (p<0,001) en la LCLA (23,37) comparado con la LE (18,78). El aporte suplementario de AGPI permitió incrementar el valor saludable de la leche producida en un sistema de alimentación estabulado manteniendo una adecuada relación (6,59) omega-6/omega-3 en la leche y confrmando la plasticidad en la composición de los AG constitutivos de la grasa láctea.  

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Publicado
2018-06-18
Como citar
GAGLIOSTRO, Gerardo Antonio et al. Obtención de leche bovina reducida en grasa saturada y naturalmente enriquecida en ácido linoleico conjugado. INNOTEC, [S.l.], n. 15 ene-jun, p. 37-43, june 2018. ISSN 1688-6593. Disponible en: <http://ojs.latu.org.uy/index.php/INNOTEC/article/view/452>. Fecha de acceso: 22 sep. 2018 doi: https://doi.org/10.26461/15.01.
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