The effects of canola oil and oregano essential oil on performance,blood parameters, and chemical carcass compositions of Dalagh fattening lambs

This study aimed to evaluating the effects of canola oil and oregano oil on performance, carcass components, blood parameters, and chemical compositions of Dalagh fattening lambs. 16 Dalagh male lambs with an average weight of 25 ± 2 kg in a completely randomized design allocated to four treatments and four replications over 80 days. Experimental treatments included: 1- control diet based without canola oil and oregano essential oil, 2- Control diet supplemented with 2 % canola oil, 3- Control diet supplemented with 2 % canola oil and 0.2 % oregano essential oil and 4- diet supplemented with 0.2 % oregano essential oil. Sheep fed by diets supplemented with canola oil and oregano oil had highest in full carcass, fresh carcass and tight weight (P<0.05). In addition, sheep fattened by oregano essence treatment and control treatment had lowest and highest in abdominal fat and half rump weight, respectively (P<0.05). The amounts of plasma glucose, total cholesterol, triglyceride, HDL and LDL were significantly affected by the treatments (P<0.05). Also, albumin, total protein and urea nitrogen of serum were not significantly affected by a treatments (P>0.05).The results showed that addition of oregano essential oil plus to canola oil proved performance, and also adding 0.2% oregano essential oil in comparison to other treatments led to positive effects on blood parameters.