Resumo

CASTILLO MITRE, Gastón Federico et al. Productivity, quality and fatty acids profile in milk of goats feed with two forages source. Ecosistemas y recur. agropecuarios [online]. 2016, vol.3, n.8, pp.173-180. ISSN 2007-901X.

Forty French Alpine goats (39.3 ± 2.0 kg PVI, first calf) were used under a completely randomized desing to evaluate the effects of two sources of fodder on their diet: Alfalfa (Medicago sativa) (T1) and alfalfa + maralfalfa grass (Pennisetum purpureum Var CT-115) (T2) on the productive response, quality and fatty acids profile of the milk on the first third of the lactating period (60 d). The consumption of dry matter (CDM) was similar (p > 0.05) for both groups. The goats that received T1 produced 0.52 kg more milk (p < 0.01), without a significant effect in fat and lactose. T2 showed more concentration of protein, total solids, density and non fat solids. The concentration of short-chain fatty acids (SCFA) had a tendency to be greater (p = 0.07) in T1, in particular the caprylic acid increased (p < 0.05). On the other hand, both the long-chain fatty acids (LCFA) as well as the mono-unsaturated fatty acids were greater (p < 0.05) in T2. The linoleic acid was lower (p < 0.01) in T2, which was reflected in a greater (p < 0.05) concentration of conjugated linoleic acid (CLA). The inclusion of maralfalfa grass in the diet of the French Alpine milk goats has a positive effect on the quality and fatty acids profile, such as the conjugated linoleic acid, which has shown to have beneficial effects on nutrition and human health.

Palavras-chave : Production; milk quality; goats; fatty acids.