فهرست مطالب reza parvar

This study was carried out to investigate the effects of different of oil sources on economic performance in fattening lambs. Thirty-five male lambs were used in a completely randomized design. Evaluation of economic performance of fattening lambs is done by 8 indices included Initial weight, final weight, dry matter intake, daily weight gain, feed conversation ratio, price of of feed intake and the cost of one kg live weight gain and 7 treatments included: 1- control diet based (without oil), 2- diet with 3 % fish oil, 3- diet with 3 % canola oil, 4- diet with 3 % soybean oil 5- diet with 1.5 % fish oil 1.5 % canola oil, 6- diet with 1.5 % fish oil 1.5 % soybean oil, 7- diet with 1.5 % canola oil 1.5 % fish oil. The results showed that the treatment contain canola oil had the highest rank. Diets containing fish oil, blend of fish oil plus soybean oil and blend of canola oil plus soybean oil had the lowest rank among treatments. The indices of initial body weight, dry matter intake and carcass weight had the highest influences on economic performance respectively. The results showed that adding of canola oil at 3% in diet had the highest economic performance, while blend of fish oil plus soybean oil and blend of canola oil plus soybean oil had the lowest economic performance and incorporation binary-blend of these oils in equal proportion is not recommended in diets of fattening lambs.