Net energy prediction and energy efficiency of feed for broiler chickens

ABSTRACT Global consumption of chicken meat has increased at a faster rate than any other animal protein source, and thus refinements in energy formulation techniques for feed have continued to gain importance. Formulation of animal feed based on net energy (NE) has been implemented in ruminants and...

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Bibliographic Details
Published in:Poultry science 2019-03, Vol.98 (3), p.1222-1234
Main Authors: Wu, Shu-Biao, Swick, Robert A, Noblet, Jean, Rodgers, Nicholas, Cadogan, David, Choct, Mingan
Format: Article
Language:English
Subjects:
Animal Feed - analysis
Animal Nutritional Physiological Phenomena
Animals
Chickens - physiology
Diet - veterinary
Energy Metabolism
Food and Nutrition
Life Sciences
Male
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Summary:ABSTRACT Global consumption of chicken meat has increased at a faster rate than any other animal protein source, and thus refinements in energy formulation techniques for feed have continued to gain importance. Formulation of animal feed based on net energy (NE) has been implemented in ruminants and pigs but not in poultry. A closed-circuit respiratory calorimetry system was employed on 25- to 28-day-old broilers fed 19 diets formulated with varying nutrient composition to produce equations to predict NE and apparent metabolizable energy (AME) efficiency of feed for broiler chickens. Performance, energy and N balance, respiratory quotient, and energy utilization were measured in the birds. Linear regression analysis was performed to generate prediction equations for dietary energy content and AME efficiency. The NE content was positively related to AME and ether extract, but negatively to crude protein. The study generated equations that can accurately predict NE, and NE/AME using AME value and chemical composition of feeds. The NE prediction equations were further validated on a separate set of diets with high correlation (r = 0.99) and accuracy. The outcomes are an important step for the broiler industry to adapt to an NE system in place of AME systems for the formulation of broiler chicken feeds following robust validation experiments.
ISSN:0032-5791
1525-3171
DOI:10.3382/ps/pey442