Suplementación con Grasa Protegida a Vacas Lecheras de Alta Producción en Inicio de Lactancia

Supplementation with bypass fat in silvopastoral systems diminishes the ratio of milk saturated/unsaturated fatty acids

“…Thus, if Gagliostro et al (2002), Jensen (2002) and Maiztegui (2002) are correct, an increase in fat concentration was not expected. Moreover a decrease in fat did not occur perhaps due to the fact that the content of CLA2 did not change in relation to the control; therefore the 'low fat syndrome' was not present (Baumgard et al 2001;Peterson et al 2004).…”

“…Gagliostro et al (2002), Jensen (2002), and Maiztegui (2002) on the other hand explain the increase in fat by the fact that the body condition of the experimental cows was low; thus bypass fat may have been the source for the increased fat in milk. On the contrary, the decrease in fat concentration reported by many authors such as Baumgard et al (2001) and Peterson et al (2004), is explained by the 'low fat milk syndrome' that is related to the formation and absorption of trans 10, cis 12 conjugated linoleic acid (CLA2) and possibly other unique fatty acids generated by biohydrogenation in rumen.…”

“…Just as McNamara et al (2003), and Rojas-Bourillon and Palavicini (1996) reported in Jersey cows an increase in milk production and a decrease of fat and protein. Gagliostro et al (2002), Jensen (2002), and Maiztegui (2002) found that supplementation with bypass fat increases fat in milk. Finally, Gulati et al (2003) reported an increase in milk production as well as in protein and fat in goat milk.…”