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Modelling energy utilisation in broiler breeder hens.
Rabello, C B V; Sakomura, N K; Longo, F A; Couto, H P; Pacheco, C R; Fernandes, J B K.
Afiliação
  • Rabello CB; Universidade Federal Rural de Pernambuco, Av. Dom Manoel de Medeiros, s/n, Dois Irmãos, Recife, Pernambuco, Brazil.
Br Poult Sci ; 47(5): 622-31, 2006 Oct.
Article em En | MEDLINE | ID: mdl-17050108
1. The objective of this study was to determine a metabolisable energy (ME) requirement model for broiler breeder hens. The influence of temperature on ME requirements for maintenance was determined in experiments conducted in three environmental rooms with temperatures kept constant at 13, 21 and 30 degrees C using a comparative slaughter technique. The energy requirements for weight gain were determined based upon body energy content and efficiency of energy utilisation for weight gain. The energy requirements for egg production were determined on the basis of egg energy content and efficiency of energy deposition in the eggs. 2. The following model was developed using these results: ME = kgW0.75(806.53-26.45T + 0.50T2) + 31.90G + 10.04EM, where kgW0.75 is body weight (kg) raised to the power 0.75, T is temperature ( degrees C), G is weight gain (g) and EM is egg mass (g). 3. A feeding trial was conducted using 400 Hubbard Hi-Yield broiler breeder hens and 40 Peterson males from 31 to 46 weeks of age in order to compare use of the model with a recommended feeding programme for this strain of bird. The application of the model in breeder hens provided good productive and reproductive performance and better results in feed and energy conversion than in hens fed according to strain recommendation. In conclusion, the model evaluated predicted an ME intake which matched breeder hens' requirements.
Assuntos
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Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Galinhas / Metabolismo Energético / Modelos Biológicos Tipo de estudo: Prognostic_studies Limite: Animals Idioma: En Revista: Br Poult Sci Ano de publicação: 2006 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido
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Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Galinhas / Metabolismo Energético / Modelos Biológicos Tipo de estudo: Prognostic_studies Limite: Animals Idioma: En Revista: Br Poult Sci Ano de publicação: 2006 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido