Explore

Communities in English

Advertise on Engormix

Productive energy (Arkansas Net Energy) is more sensitive than classic net energy determination to performance and actual net energy fractions for gain and maintenance

Published: February 16, 2024
By: Diego Martinez*, Nawin Suesuttajit, Cole Umberson, Craig Coon / University of Arkansas
Diego Martínez (University of Arkansas)
     
An energy system is needed to optimize feed formulation and influence economics and sustainability. This study assessed the sensitivity of productive energy (PE) and classic net energy (CNE) to BW gain (BWG), feed conversion ratio (FCR), and net energy for gain (NEg) and maintenance (NEm), and developed models to predict BWG, FCR, and protein accretion (PAC). 1920 chicks in 96 pens were assigned to one of 8 blocks and 12 experimental diets, which varied in total digestible amino acids (TDAA; T1-T3) or digestible (dig.) starch and TDAA (T4-T6), or increasing (oil, TDAA; T7-T9) or reducing (soy hulls; T10-T12) densities. Blocks received a standard diet before transitioning to successive one-week treatment intervals, starting after the previous block. Birds were control-fed to control energy intake. In each block, BWG and FCR were assessed, body protein, fat, and energy gain (NEg) were determined with dual-energy X-ray absorptiometry, and heat production (NEm, fasting one) in calorimetry chambers. Diet N-corrected apparent metabolizable energy (AMEn), non-starch polysaccharides and dig. fat, dig. starch, dig. crude protein (dCP), and TDAA were determined. CNE was calculated as AMEn – heat increment and PE as NEg + NEm. A Completely Randomized Block Design with 12 treatments, 8 blocks, and 1 replication per block was used. ANOVA and Tukey tests were run. The sensitivity of the energy systems was determined by comparing Tukey outcomes for PE and CNE with those of BWG, FCR, NEg, and NEm. Linear mixed modeling used JMP. BWG, FCR, PAC, NEg, and PE were positively influenced (P< 0.05) by TDAA or diet density (P< 0.05) and negatively by diet dilution. The PE (not AMEn or CNE) efficiency to produce BWG and PAC was stable (P> 0.05) across treatments. PE was 2.3, 1.8, 1.8, and 1.8 times more sensitive to BWG, FCR, NEg, and NEm, respectively, than CNE. Models to predict BWG, FCR, and PAC based on digestible nutrients were validated (adjR2> 0.95). Models to predict BWG (adjR2=0.99), FCR (adjR2=0.86), and PAC (adjR2=0.98) based on PE were validated. The one for FCR also included dCP. In conclusion, PE is 90% more sensitive than CNE to changes in performance and actual net energy constituents (NEg, NEm) than CNE, and models to predict BWG, FCR, and PAC based on PE were developed.
Key Words: Productive energy, Arkansas Net Energy, net energy, predicting performance, broilers.
      
Abstract presented at the International Poultry Scientific Forum at IPPE 2024 in Atlanta, USA.
Content from the event:
Related topics:
Authors:
Diego Martinez Patiño-Patroni
University of Arkansas (USA)
University of Arkansas (USA)
Nawin Suesuttajit
University of Arkansas (USA)
University of Arkansas (USA)
Cole Umberson
University of Arkansas (USA)
University of Arkansas (USA)
Craig Nelson Coon
University of Arkansas (USA)
University of Arkansas (USA)
Show more
Recommend
Comment
Share
MIGUEL A. CORREA
3 de marzo de 2024

Good morning, Diego Martinez.
I would like to know if there are values of Ep as a nutrient in the ingredients of common use for the formulation of balanced feed for poultry and/or pigs. Regards

Recommend
Reply
Profile picture
Would you like to discuss another topic? Create a new post to engage with experts in the community.
Featured users in Animal Feed
Dave Cieslak
Dave Cieslak
Cargill
United States
Inge Knap
Inge Knap
DSM-Firmenich
Investigación
United States
Alex Corzo
Alex Corzo
Aviagen
United States
Join Engormix and be part of the largest agribusiness social network in the world.