Effects of Different Levels of Dietary Oils on Growth Performance and Fatty Acid Proportion of Steaks from Sarabi Steers

An experiment was conducted to evaluate effects of diet supplementation with vegetable oils sources on bulls performance and fatty acid (FA) proportion of steaks. Twenty one Sarabi steers (20Q±20 kg BW ) were assigned in seven treatment, fed diets containing 0% oil (control), 2 and 4% of canola oil (CO), sunflower oil (SO) and restaurant waste oils (RWO). Ribeye steaks from steers fed CO, SO and RWO for 90 days of experiment were used after slaughtering to evaluate the effects of oil source on fatty acid profile. Fattening bulls fed 2% oils and control tended to have greater diy matter intake (DME) as compared with those fed 4% oil (P <0.05). The highest daily weight gain (DWG) was observed in 2% RWO, followed by 2% SO dietaiy groups, but differences were not significant. The SFAs contents of steaks of bulls fed diets supplemented with 2% CO did showed the lowest value and followed by 2% SO dietaiy groups. Steaks from bulls fed 2% CO and SO had highest aggregation of polyunsaturated fatty acids (PUFA, 52 and 53%, respectively) and lowest saturated/polyunsaturated FAs ratio (0.647 and 0.753, respectively).