The effects of feeding oxidized and refined oils with various mineral adsorbents on broiler’s performance and blood parameters

This experiment was conducted to investigate the possibility of using refined oil with various adsorbents in broiler chicken feed and its effect on performance and blood parameters. Soybean oil was heated at 180C for 20 hours. Then various adsorbents were added to it and the quality of oil was evaluated. Heating increased (P<0.05) peroxide, acidic, iodine, and carbonyl values in heated oil. Treatment of burned oil with adsorbents improved oil quality (P<0.05). Then, the possibility of using refined oil in 480 broiler chicks of the commercial strain of Ross 308 was investigated in 8 treatments, 5 replications, and 12 chicks per replicate. Dietary treatments were as: T1: Control (3% crude oil), T2: 3% crude oil+200 ppm α-tocopherol, T3: 3% oxidized oil, T4: 3% oxidized oil+200 ppm α-tocopherol, T5: 3% refined oil using calcium silicate, T6: 3% refined oil using zeolite, T7: 3% refined oil using rice hull ash, T8: 3% refined oil using a mixture of 3 absorbents. The results showed that adding untreated burnt oil to diet led to a remarkable decrease in chicken’s weight gain and significant increase in FCR in the entire rearing period (P < 0.05). Using α-tocopherol and refining oil compensated for some negative effects of burned oil (P<0.05). Untreated burnt oil had the lowest total protein concentration compared to other treatments (P < 0.05). These results showed that addition of alpha-tocopherol, calcium silicate, and a combination of the three inorganic adsorbents to burnt oil leads to improved growth performance during the entire growth period.