Influence of body weight of the pullets at hatch on egg production at the onset of the subsequent laying period

Mandalawi, H. A.; Camara Garcia, Lourdes; Saldaña, B.; Guzmán, P.; Rodríguez, Raúl; Cámara, L. y Gonzalez Mateos, Gonzalo (2015). Influence of body weight of the pullets at hatch on egg production at the onset of the subsequent laying period. En: "Poultry Science Association 104th Annual Meeting", 27/07/2015-30/07/2015, Louisville, Kentucky. p. 1.

Descripción

Título: Influence of body weight of the pullets at hatch on egg production at the onset of the subsequent laying period
Autor/es:
  • Mandalawi, H. A.
  • Camara Garcia, Lourdes
  • Saldaña, B.
  • Guzmán, P.
  • Rodríguez, Raúl
  • Cámara, L.
  • Gonzalez Mateos, Gonzalo
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: Poultry Science Association 104th Annual Meeting
Fechas del Evento: 27/07/2015-30/07/2015
Lugar del Evento: Louisville, Kentucky
Título del Libro: Poultry Science Association
Fecha: 2015
Materias:
Escuela: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Departamento: Producción Agraria
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

We studied the influence of pre-incubation weight of eggs (EW) laid by 24 wk-old brown laying breeders on egg production from 18 (start of egg production) to 22 wk of age (average egg production across EW treatments of 87.8%). The experiment consisted in 7 treatments based on the initial EW (47 to 53 g with 1 g difference between groups) Average BW of the extreme groups varied at hatching from 32.5 to 35.4 g, respectively. Feed intake, egg production, and egg weight were recorded weekly by replicate as well as for the entire experiment (18 to 22 wk of age). Hens were weighed by replicate at the beginning and at the end of the experiment. From these data, ADFI, egg production, egg weight, egg mass, feed conversion ratio per kilogram of eggs and per dozen of eggs, and BW gain were calculated by week and for the entire experiment. Also, the number of dirty, broken, and shell-less eggs was recorded daily by replicate in all eggs produced. Data were analyzed as a completely randomized design with 7 treatments differing in the initial pre-hatching EW. Effects of EW on the variables studied were partitioned into linear and quadratic components. EW did not affect the age at which pullets reached 50% egg production, cumulative egg production, or BW gain of the hens from 18 to 22 wk of age. Egg weight and the proportion of dirty, broken, and shell-less eggs were not affected by the BW of the pullets at hatching. In summary, small eggs (>47 g) laid by young, healthy laying breeders, can be used successfully to produce high quality pullets

Más información

ID de Registro: 41567
Identificador DC: http://oa.upm.es/41567/
Identificador OAI: oai:oa.upm.es:41567
Depositado por: Memoria Investigacion
Depositado el: 24 Jun 2016 14:54
Ultima Modificación: 24 Jun 2016 14:54
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