Related Experiment Video
Updated: Oct 16, 2025
11:08
A Facile Protocol to Generate Site-Specifically Acetylated Proteins in Escherichia Coli
Published on: December 9, 2017
7.2K
Modelling Broiler Requirements for Lysine and Arginine
Bernardo Rocha Franco Nogueira1, Nilva Kazue Sakomura1, Matheus de Paula Reis1
1Department of Animal Sciences, Faculty of Agrarian and Veterinary Science, São Paulo State University, Jaboticabal 14884-900, São Paulo, Brazil.
Animals : an Open Access Journal From MDPI
|October 23, 2021
Summary
Broiler chickens efficiently utilize standardized ileal digestible lysine and arginine, with utilization rates unaffected by age or sex. Accurate prediction models are crucial for optimizing broiler nutrition.
Area of Science:
- Animal Science
- Poultry Nutrition
- Nutrient Utilization
Background:
- Optimizing broiler nutrition requires precise understanding of amino acid utilization.
- Standardized ileal digestible (SID) lysine (Lys) and arginine (Arg) are critical for growth and protein deposition.
- Existing models may need refinement for accurate prediction of broiler nutrient requirements.
Purpose of the Study:
- To investigate male and female broiler responses to SID Lys and Arg.
- To estimate the efficiency of utilization (k) for both amino acids.
- To adjust factorial models for predicting SID Lys and Arg intake in broilers.
Main Methods:
- Six assays involving 1280 Cobb 500® broilers (male and female) per assay.
- Dietary treatments with varying levels of SID Lys or SID Arg using dilution technique.
- Linear regression analysis to contrast utilization efficiencies (k) across different growth phases and sexes.
Main Results:
- Estimated efficiencies of utilization were 0.79 for Lys and 0.62 for Arg.
- Amino acid utilization efficiencies were not significantly affected by growth phase or sex.
- Factorial models based on protein deposition (M2) showed lower prediction error for SID Lys and Arg intake.
Conclusions:
- Broiler chickens require 94.9 mg/d SID Lys and 92.9 mg/d SID Arg per gram of body protein deposited.
- The efficiency of SID Lys and Arg utilization is consistent across different broiler ages and sexes.
- Model M2 provides a more accurate estimation of SID Lys and Arg requirements for broiler growth.
