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Impact of growth curve and dietary energy-to-protein ratio of broiler breeders on offspring quality and performance.
Heijmans, J; Duijster, M; Gerrits, W J J; Kemp, B; Kwakkel, R P; van den Brand, H.
Afiliación
  • Heijmans J; De Heus Animal Nutrition B.V., Ede, the Netherlands; Animal Nutrition Group, Department of Animal Sciences, Wageningen University, Wageningen, the Netherlands; Adaptation Physiology Group, Department of Animal Sciences, Wageningen University, Wageningen, the Netherlands. Electronic address: jheijman
  • Duijster M; De Heus Animal Nutrition B.V., Ede, the Netherlands.
  • Gerrits WJJ; Animal Nutrition Group, Department of Animal Sciences, Wageningen University, Wageningen, the Netherlands.
  • Kemp B; Adaptation Physiology Group, Department of Animal Sciences, Wageningen University, Wageningen, the Netherlands.
  • Kwakkel RP; Animal Nutrition Group, Department of Animal Sciences, Wageningen University, Wageningen, the Netherlands.
  • van den Brand H; Adaptation Physiology Group, Department of Animal Sciences, Wageningen University, Wageningen, the Netherlands.
Poult Sci ; 101(11): 102071, 2022 Nov.
Article en En | MEDLINE | ID: mdl-36130449
The impact of growth curve (GC) and dietary energy-to-protein ratio of broiler breeder hens on chick quality and broiler performance was investigated. Pullets (n = 1,536) were randomly allotted to 24 pens and assigned to 1 of 8 treatments from hatch onwards, according to a 2 × 4 factorial arrangement with 2 GC (standard growth curve = SGC or elevated growth curve = EGC, +15%) and 4 diets, differing in energy-to-protein ratio (96%, 100%, 104%, and 108% AMEn diet). At 28 and 36 wk of age, 60 hatching eggs per maternal pen were selected for incubation and 768-day-old broilers were assigned to 32 pens according to maternal treatment. Broilers from EGC breeders were 1.9 g heavier at hatch (P < 0.001) and 36 g heavier at slaughter (P = 0.001) than broilers from SGC breeders due to a 1.0 g/d higher growth rate (P = 0.003) and 1.5 g/d higher feed intake (P = 0.006) from hatch to 32 d of age. An increase in breeder dietary energy-to-protein ratio resulted in a linear decrease in embryonic mortality in the first 3 d of incubation (ß = -0.2% per % AMEn; P = 0.05). At hatch, broiler BW decreased with an increasing breeder dietary energy-to-protein ratio (ß = -0.1 g per % AMEn; P = 0.001), whereas at slaughter broiler BW increased with an increasing breeder dietary energy-to-protein ratio (ß = 3.2 g per % AMEn; P = 0.02). This was due to a linear increase in growth rate (ß = 0.1 g/d per % AMEn; P = 0.004) and feed intake (ß = 0.1 g/d per % AMEn; P = 0.02). Additionally, an increase in breeder dietary energy-to-protein ratio resulted in a linear decrease in body weight corrected feed conversion ratio (ß = -0.002 per % AMEn; P = 0.002). Overall, it can be concluded that a higher GC of breeders and an increase in breeder dietary energy-to-protein ratio enhances offspring performance.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Pollos / Fenómenos Fisiológicos Nutricionales de los Animales Límite: Animals Idioma: En Revista: Poult Sci Año: 2022 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
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Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Pollos / Fenómenos Fisiológicos Nutricionales de los Animales Límite: Animals Idioma: En Revista: Poult Sci Año: 2022 Tipo del documento: Article Pais de publicación: Reino Unido