Effect of soybean oil and its acidulated soapstock on broiler performance, carcass traits and blood

600 seven day-old Ross broiler chicks were tested in a factorial experiment (2×5) with two levels of oil (three and six percent) and five levels of soybean oil and soapstock (100:0, 75:25, 50:50, 25:75 and 0:100) with four replicates. Rations were isocaloric and isonitrogenus. The chicks of the rations with three percent fat had higher weight gain and lower feed intake and feed: gain ratio (P<0.05) in whole period. In starter and grower periods, the chicks of ration with three percent fat with soybean oil: soapstock ratio of 0: 100 had lower feed intake and better feed: gain ratio. It was concluded that the acidulated soaopstock could be replaced by soybean oil completely in three percent level in all periods.