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Modelling energy utilisation in broiler breeder hens.

C B V Rabello1, N K Sakomura, F A Longo

  • 1Universidade Federal Rural de Pernambuco, Av. Dom Manoel de Medeiros, s/n, Dois Irmãos, Recife, Pernambuco, Brazil.

British Poultry Science
|October 20, 2006
PubMed
Summary

A new model accurately predicts the metabolisable energy (ME) needs for broiler breeder hens. This model optimizes energy utilization, leading to improved hen performance and feed conversion efficiency.

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Area of Science:

  • Animal Science
  • Nutritional Physiology
  • Poultry Science

Background:

  • Accurate estimation of nutrient requirements is crucial for optimizing broiler breeder hen performance.
  • Environmental factors, such as temperature, significantly influence energy metabolism and requirements.
  • Existing feeding programs may not fully account for the dynamic needs of broiler breeders.

Purpose of the Study:

  • To develop a comprehensive metabolisable energy (ME) requirement model for broiler breeder hens.
  • To quantify the impact of ambient temperature on the maintenance energy requirements.
  • To validate the developed ME model against established feeding recommendations.

Main Methods:

  • Comparative slaughter technique to determine energy requirements for maintenance at different temperatures (13°C, 21°C, 30°C).

Related Experiment Videos

  • Calculation of energy requirements for weight gain based on body energy content and utilization efficiency.
  • Determination of energy requirements for egg production based on egg energy content and deposition efficiency.
  • A feeding trial involving 400 broiler breeder hens and 40 males to compare the model's predictions with a standard feeding program.

    • Main Results:

    • A predictive model for ME requirements was established: ME = kgW0.75(806.53-26.45T + 0.50T2) + 31.90G + 10.04EM.
    • The model incorporates body weight, ambient temperature, weight gain, and egg mass.
    • The feeding trial demonstrated that the model-guided feeding resulted in comparable or superior productive and reproductive performance.
    • Improved feed and energy conversion ratios were observed when using the model compared to the strain recommendation.

    Conclusions:

    • The developed ME requirement model accurately predicts the energy needs of broiler breeder hens.
    • Application of the model enhances productive and reproductive outcomes.
    • The model offers a more efficient approach to feed and energy management in broiler breeder flocks.