Metabolizable energy values and metabolizability coefficients of ether extracts of different types of corn oil for broilers

Abstract

This study aimed to determine and compare the metabolizable energy values and metabolizability coefficients of three types of corn oil (crude, semi-refined, and acid) in broiler chickens. A total of 240 Cobb500™ lineage chickens were randomly distributed into metabolic cages with four treatments, 10 repetitions, and 6 birds per experimental unit. The birds were fed with specific diets for each treatment, and the total excreta collection was conducted from days 23 to 27. Gross energy (GE), apparent metabolizable energy (AME), and nitrogen-corrected apparent metabolizable energy (AMEn) values were calculated for each type of oil. Metabolizability coefficients of the ether extract (MCEE) were also determined. Statistical analysis of the results was performed using the Tukey test at a 5% probability level. There was a significant difference in AME and MCEE values (P<0.05). Crude corn oil showed higher AME values compared to acid corn oil. The same trend was observed for MCEE (P<0.05). The values found for the oils were: crude corn oil - GE: 9330 kcal/kg, AME: 8916.84 kcal/kg, AMEn: 8905.60 kcal/kg, MCEE: 97.14%; semi-refined corn oil - GE: 9480 kcal/kg, AME: 8547.99 kcal/kg, AMEn: 8303.46 kcal/kg, MCEE: 96.64%; acid corn oil - GE: 9114 kcal/kg, AME: 7197.73 kcal/kg, AMEn: 7515.68 kcal/kg, MCEE: 96.17%.