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Related Experiment Videos

Comparison between broilers and layers for growth and protein use by embryos.

Y Ohta1, T Yoshida, N Tsushima

  • 1Nippon Veterinary and Animal Science University, 1-7-1, Kyonan-cho, Musashino-shi, Tokyo, Japan, 180-8602. ohta-y@nvau.ac.jp

Poultry Science
|May 15, 2004
PubMed
Summary

Amino acid supplementation enhanced broiler hatching plasma amino acid concentrations but not in layers. Broiler embryos showed higher growth and protein content later in incubation, suggesting egg protein is insufficient for maximum broiler embryo growth.

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Area of Science:

  • Animal Science
  • Poultry Nutrition
  • Embryonic Development

Background:

  • Broilers and layers have distinct growth potentials and nutritional requirements.
  • Understanding embryonic development and protein utilization is crucial for optimizing poultry production.
  • Egg composition and nutrient availability during incubation influence chick quality and growth.

Purpose of the Study:

  • To compare embryonic growth and protein utilization between broiler and layer chickens.
  • To investigate the impact of amino acid supplementation on plasma amino acid profiles in newly hatched chicks.
  • To determine if egg protein content is adequate for broiler embryonic development.

Main Methods:

  • Three experiments involving broiler and layer eggs of similar weight.

Related Experiment Videos

  • In ovo injection of amino acid (AA) solutions or control into eggs at day 7 of incubation.
  • Analysis of plasma amino acid concentrations, embryo weights, and crude protein (CP) content during incubation.

    • Main Results:

    • Amino acid injection increased plasma concentrations of specific amino acids (Tau, Thr, Lys) in hatched broiler chicks, but not in layers.
    • Amino acid injection altered the amino acid ratio to Lys in broilers, but not layers.
    • Broiler embryos exhibited higher weights and crude protein content on days 14 and 19 of incubation compared to layer embryos.

    Conclusions:

    • Egg protein content appears adequate for hatching but may be insufficient for optimal broiler embryo growth.
    • Broiler embryos have a higher demand for nutrients during later stages of incubation compared to layer embryos.
    • Amino acid supplementation can positively impact plasma amino acid levels in newly hatched broilers.