The Thai Journal of Veterinary Medicine


The objective of this study was to evaluate the effect of different inclusion levels of OPF in total mixed ration (TMR)-based diet on yield, composition, FA profile and CLA content of milk in dairy goats. Six nulliparous female dairy goats (Saanen x Thai native, 19-21 months old, first lactation) were randomly set according to a 3x3 Latin square design with 2 replications for receiving diets consisted of 0% OPF (OPF0), 20% OPF (OPF20) and 40% OPF (OPF40). The average weight of the goats was 32.48±1.30 kg (mean±s.d.). The findings of this study showed that dry matter intake (DMI) and all nutrient intake of the goats increased significantly as OPF inclusion was increased (p<0.05), excluding crude protein intake (CPI) (p>0.05). Goats from OPF40 group had the highest CPI, however, there was no significant difference (p>0.05) in CPI of OPF20 and OPF0 groups. Feeding OPF altered the composition of protein and lactose, density and freezing point (p<0.05). However, it did not influence (p>0.05) the composition of fat, solid non-fat and minerals in the milk. There were no significant differences in oleic acid, dihomo-γ-linoleic acid, and eicosapentaenoic acid in milk fat of goats (p>0.05). 40% OPF inclusion increased the production of LnA, DHA, CLA and the ratio of PUFA:SFA; and lowered AA production and n-6:n-3 ratio of goat milk (p>0.05). It can be concluded that 40% OPF inclusion in TMR-based diet can be used as an alternative to producing goat’s milk with enriched potential health benefits.

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