Portal de Periódicos da CAPES

Artigo Acesso aberto Produção Nacional Revisado por pares

BIBTEX RIS

Intramuscular fatty acid composition of steers finished on oat pastures mixture with vetch or cornmeal supplementation

2020; UNIVERSIDADE FEDERAL DE SANTA MARIA; Volume: 50; Issue: 6 Linguagem: Inglês

10.1590/0103-8478cr20200030

1678-4596

Talita Cristina Taffarel, Luís Fernando Glasenapp de Menezes, Fernando Kuss, Wagner Paris, José Laerte Nörnberg, Roberta Farenzena, Eduardo Felipe Colerauz de Oliveira Lazzarotto, Matheus Massaru Goto Hirai,

Animal Nutrition and Physiology

ABSTRACT: The effects of energetic supplementation and mixture vetch (Vica sativa L.) were studied to evaluate the intramuscular fatty acid profile of steers finished on oat (Avena sativa L.) pastures. Eighteen 21-month-old crossbred steers were evaluated. The experiment was carried out in three treatments and six repetitions: oat pasture (OA), oat pasture + vetch (OA + VET), and oat pasture + supplementation (OA + SUP). Supplementation comprised the addition of corn meal at a daily dose of 1% of the animals’ body weight. Steers receiving supplementation had higher lipid content in Longissimus lumborum than did those fed with OA + VET (1.25 vs 1.02%), whereas those fed with OA (1.15%) showed intermediate values. Conjugated linoleic acid levels were higher in steers fed OA (0.57%) and OA + SUP (0.59%), whereas the highest amount of omega-3 fatty acids was observed in animals fed OA + VET (3.32%). Pasture-finishing without supplementation resulted in a lower ratio of n-6:n-3 (3.14). Steers finished in oat mixture with vetch showed healthier intramuscular fat than did those finished with cornmeal supplementation; importantly, the higher the amount of PUFAs, the better n-6:n-3 ratio.