title: Validation of Prediction Equations of Energy Values of a Single Ingredient or Their Combinations in Male Broilers.
abstract: A set of prediction equations to estimate the nitrogen-corrected apparent metabolizable energy (AMEn) of individual ingredients and diets used in the poultry feed industry was evaluated. The AMEn values of three energy ingredients (maize, sorghum and defatted maize germ meal), four protein ingredients (soybean meal, maize gluten meal 60% crude protein, integral micronized soy and roasted whole soybean) and four diets (three containing four feedstuffs, complex diets, and one containing only corn-soybean meal, basal diet) were determined using a metabolism assay with male broilers from 1 to 7, 8 to 21, 22 to 35, and 36 to 42 days old. These values were compared to the AMEn values presented in the tables of energy composition or estimated by equation predictions based on chemical composition data of feedstuffs. In general, the equation predictions more precisely estimated the AMEn of feedstuffs when compared to the tables of energy composition. The equation AMEn (dry matter [DM] basis) = 4,164.187+51.006 ether extract (% in DM basis)-197.663 ash-35.689 crude fiber (% in DM basis)-20.593 neutral detergent fiber (% in DM basis) (R(2) = 0.75) was the most applicable for the prediction of the energy values of feedstuffs and diets used in the poultry feed industry.
authors.affiliation: Veterinary Medicine Department, Federal University of Lavras, Lavras, MG 37200-000, Brazil .
authors.forename: R R
authors.initials: RR
authors.lastname: Alvarenga
authors.affiliation: Veterinary Medicine Department, Federal University of Lavras, Lavras, MG 37200-000, Brazil .
authors.forename: P B
authors.initials: PB
authors.lastname: Rodrigues
authors.affiliation: Veterinary Medicine Department, Federal University of Lavras, Lavras, MG 37200-000, Brazil .
authors.forename: M G
authors.initials: MG
authors.lastname: Zangeronimo
authors.affiliation: Veterinary Medicine Department, Federal University of Lavras, Lavras, MG 37200-000, Brazil .
authors.forename: E C
authors.initials: EC
authors.lastname: Oliveira
authors.affiliation: Exact Science Department, Federal University of Lavras, Lavras, MG 37200-000, Brazil .
authors.forename: F C M Q
authors.initials: FC
authors.lastname: Mariano
authors.affiliation: Veterinary Medicine Department, Federal University of Lavras, Lavras, MG 37200-000, Brazil .
authors.forename: E M C
authors.initials: EM
authors.lastname: Lima
authors.affiliation: Veterinary Medicine Department, Federal University of Lavras, Lavras, MG 37200-000, Brazil .
authors.forename: A A P
authors.initials: AA
authors.lastname: Garcia
authors.affiliation: Veterinary Medicine Department, Federal University of Lavras, Lavras, MG 37200-000, Brazil .
authors.forename: L P
authors.initials: LP
authors.lastname: Naves
authors.affiliation: Veterinary Medicine Department, Federal University of Lavras, Lavras, MG 37200-000, Brazil .
authors.forename: N B S
authors.initials: NB
authors.lastname: Nardelli
keywords: Energy; Feed Formulation; Poultry; Prediction Equation