Assessment of the nitrogen correction factor in evaluating metabolizable energy of corn and soybean meal in diets for broilers

Poultry Science
G Lopez, S Leeson

Abstract

Three experiments were carried out to determine AME and AMEn of corn and soybean meal (SMB) in diets for growing broilers. In experiments 1 and 2, ingredient-specific basal diets or a combination of these basal diets with corn and SBM were prepared. For corn, the substitution was 25, 50, or 75% of the total diet, whereas SBM substitution was at 10, 20, or 30%. In experiment 1, birds were fed the experimental diets continuously from 0 to 33 d, and AME and AMEn were determined during 9 to 12 d and 30 to 33 d of age. In experiment 2, birds were fed the experimental diets only around the time of the collection period. The AMEn of corn was 95 to 97% of corresponding AME, whereas for SBM, AMEn was 93 to 88% of AME. Linear regression was used as an alternative method of calculating ingredient energy values resulting in a significant regression of diet AME and AMEn content on inclusion level, for each period of time and for each ingredient (corn and SBM). Based on varying inclusion levels of test ingredients in the diet, the extrapolated AME and AMEn of corn were estimated more precisely (R2 = 0.90 to 0.95) than those of SBM (R2 = 0.57 to 0.85), suggesting that the variability of AME and AMEn is better explained by a linear regression ...Continue Reading

Citations

Aug 3, 2016·Journal of Animal Science·B J KerrG C Shurson
Apr 11, 2019·Poultry Science·S CerrateC Coon
Jun 22, 2019·Poultry Science·Shahram BarzegarRobert A Swick
Nov 21, 2020·Animals : an Open Access Journal From MDPI·Shravani Veluri, Oluyinka Abiona Olukosi

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