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Memorias de investigación
Communications at congresses:
Influence of body weight of the pullets at hatch on egg production at the onset of the subsequent laying period
Year:2015
Research Areas
  • Animal production
Information
Abstract
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
International
Si
Congress
Poultry Science Association 104th Annual Meeting
960
Place
Louisville, Kentucky
Reviewers
Si
ISBN/ISSN
0032-5791
Start Date
27/07/2015
End Date
30/07/2015
From page
146
To page
146
Poultry Science Association 104th Annual Meeting
Participants
  • Autor: Husham Abdulsattar Dawood (UPM)
  • Autor: Beatriz Saldaña Mancebo (UPM)
  • Autor: Pilar Guzmán (UPM)
  • Autor: Raúl Rodríguez (Ibérica de Tecnología Avícola (Ibertec) S.A.U, Valladolid, Spain.)
  • Autor: Lourdes Camara Garcia (UPM)
  • Autor: Gonzalo Gonzalez Mateos (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Producción Animal
  • Departamento: Producción Agraria
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