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

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

doi:10.1590/0103-8478cr20200030

Talita Cristina Taffarel, Roberta Farenzena + Show 6 more

Open Access

https://doi.org/10.1590/0103-8478cr20200030

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Abstract

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.

Highlights

Mixture between grasses and temperate legumes has proved to be important for feeding beef cattle because these species possess excellent forage quality and provide high yields per area, allowing for long grazing periods, and improving the performance of animals during the critical production period (LISBINSKI et al, 2019)
The beef cattle production aiming for high meat quality depends on the nutritional value of the diet offered to the animals
The present study investigated the effects of energetic supplementation and mixture vetch (Vicia sativa L.) to evaluate the intramuscular fatty acid profiles of steers finished on oat (Avena sativa L.) pastures

Summary

Introduction

Mixture between grasses and temperate legumes has proved to be important for feeding beef cattle because these species possess excellent forage quality and provide high yields per area, allowing for long grazing periods, and improving the performance of animals during the critical production period (LISBINSKI et al, 2019). This increase in production is because of the long and later cycle of legume as compared to oat (WAGHORN & CLARK, 2004). Factors that influenced the quality of animal products can be controlled at various stages of their production through manipulation of parameters such as nutrition that directly affect the growth rate of animals (WOOD et al, 2003)

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