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Related Experiment Videos

Dietary lysine needs of late-developing heavy broilers.

A Corzo1, W A Dozier, M T Kidd

  • 1Department of Poultry Science, Mississippi State University, Mississippi State 39762, USA. acorzo@poultry.msstate.edu

Poultry Science
|March 24, 2006
PubMed
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Dietary lysine supplementation improved feed conversion and meat yield in male broilers aged 42-56 days. Female broilers showed no response, indicating different lysine requirements for optimal growth and meat production.

Area of Science:

  • Animal Science
  • Poultry Nutrition
  • Avian Physiology

Background:

  • Broiler nutrition is critical for meat production efficiency.
  • Lysine (Lys) is an essential amino acid influencing growth and meat yield.
  • Optimizing dietary nutrient levels is key to maximizing broiler performance.

Purpose of the Study:

  • To determine the dietary lysine requirements for late-developing broiler males and females.
  • To evaluate the impact of varying lysine concentrations on growth, feed conversion, and meat yield.
  • To establish optimal lysine levels for high-yield broiler production.

Main Methods:

  • Two studies were conducted on Hubbard Ultra Yield broilers from 42 to 56 days of age.
  • Broilers were fed diets with 7 gradient concentrations of lysine (0.68% to 1.10%).

Related Experiment Videos

  • Regression analysis was used to estimate lysine requirements based on observed responses.

    • Main Results:

    • Female broilers did not respond to dietary lysine supplementation for any measured variable.
    • Lysine supplementation linearly improved feed conversion in male broilers (P < 0.01).
    • Fillet and tender weights increased linearly in males, while carcass, fillet, and breast meat yields showed quadratic responses, optimizing at 0.88-0.93% lysine.

    Conclusions:

    • High-yield male broilers require a minimum of 0.93% total dietary lysine (0.85% digestible) from 42 to 56 days.
    • Female broilers may require less dietary lysine for adequate growth and meat yield.
    • These findings aid in formulating precise diets for different broiler sexes to enhance production efficiency.