PERFIL DE ÁCIDOS GRAXOS NO LEITE DE CABRAS ALIMENTADAS COM NÍVEIS CRESCENTES DE FENO DE FLOR-DE-SEDA

Abstract

The objective in this study was to evaluate the effects of replacing concentrate by flor-de-seda hay under the levels of 0; 15; 30; 45 and 60 % on the fatty acids profile of goat milk. Five multiparus goats of the alpine origin were used with 106 days on lactation at the beginning of the trial, being milked twice daily (06:00 and 16:00 hs). The goats were allotted into a 5 x 5 Latin Square, consisted of five periods of 13 days which, in which the first 10 days were for adaptation of the animals to the new diet and the other three days used to collect the milk from the animals. It was identified the presence of 13 fatty acids, being 8 saturated, small, medium and large chain (C6 to C20), 3 monounsaturated of medium and long chain (C14 to C18) and 2 polyunsaturated of long chain (C18:2 and C18:3). There was not detected any significant difference (P>0.05) on the variables evaluated but on miristoleic acid (P<0.05). The presence of CLA (linoleic conjugated acid) was not evident, although its precursors (C18:2 and C18:3) were identified. It could be concluded that flor-de-seda hay can be included in the diet up to the level of 60% without causing a depression on milk content of essential fatty acids.