A comparison of Soybean Oil Ingredients for Broilers was conducted to estimate the true metabolizable energy (TME) values of acidulated soybean oil soapstock and crude soybean oil and to evaluate their effect on broiler production. True metabolizable energy values of oils were estimated using a rooster assay. These determined values were then used to formulate broiler diets. Ross 308 broiler chicks were randomly allotted to the two treatments and 8 replications, with 16 birds each. Fatty acid methyl ester analysis showed that soybean oil contained a higher proportion of unsaturated fatty acids, whereas soybean soapstock had a higher proportion of saturated fatty acids. Soybean oil had higher TME values (8.99 Mcal/kg) compared to soybean soapstock oil (8.11Mcal/kg) (P < 0.05).
Results of the broiler feeding experiment did not show significant differences (P > 0.05) in weight gain, feed consumption, feed conversion rate, or mortality between oil treatments. In conclusion, acidulated soybean oil soapstock was shown to have lower TME and TMEn values compared to crude soybean oil, however, it can be safely included in broiler diets without negatively affecting their productivity.