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Archivos de medicina veterinaria

versión impresa ISSN 0301-732X

Resumen

MARTINEZ MARIN, AL et al. Adding plant oils to dairy goat diets: effect on fatty acid content of milk fat. Arch. med. vet. [online]. 2013, vol.45, n.3, pp.259-266. ISSN 0301-732X.  http://dx.doi.org/10.4067/S0301-732X2013000300005.

The aim of this study was to investigate the effects of adding differently unsaturated vegetable oils to a dairy goat diet on fatty acid content of milk fat. Twelve Malagueña goats were randomly allocated to one of four treatments: no oil basal diet and the same basal diet supplemented with 48 g/d of high oleic sunflower oil, regular sunflower oil or linseed oil. The basal diet was made of alfalfa hay and a pelleted concentrate (30:70 w/w). The concentrate included the respective oils. Supplemented diets decreased medium chain saturated fatty acid content in milk fat (P < 0.05). High oleic sunflower oil increased stearic and oleic acid contents (P < 0.05) and did not affect neither the content of trans monounsaturated fatty acids of 18 carbon atoms nor conjugated linoleic acid content (P > 0.05). Regular sunflower oil increased C18:1t10, vaccenic and rumenic acid contents as well as linoleic to α-linolenic acid ratio (P < 0.05). Linseed oil increased vaccenic, rumenic and α-linolenic acid contents and substantially decreased linoleic to α-linolenic acid ratio (P < 0.05) without affecting C18:1t10 content (P > 0.05). It was concluded that compared to high oleic o regular sunflower oils, adding linseed oil in dairy goat diets modifies milk fat fatty acid content more favourably from the point of view of human health.

Palabras clave : plant oil; dairy goats; fatty acid profile; milk fat.

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