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

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

Description

Title: Influence of body weight of the pullets at hatch on egg production at the onset of the subsequent laying period
Author/s:
  • Mandalawi, H. A.
  • Camara Garcia, Lourdes
  • Saldaña, B.
  • Guzmán, P.
  • Rodríguez, Raúl
  • Cámara, L.
  • Gonzalez Mateos, Gonzalo
Item Type: Presentation at Congress or Conference (Article)
Event Title: Poultry Science Association 104th Annual Meeting
Event Dates: 27/07/2015-30/07/2015
Event Location: Louisville, Kentucky
Title of Book: Poultry Science Association
Date: 2015
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Producción Agraria
Creative Commons Licenses: Recognition - No derivative works - Non commercial

Full text

[img]
Preview
PDF - Requires a PDF viewer, such as GSview, Xpdf or Adobe Acrobat Reader
Download (261kB) | Preview

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

More information

Item ID: 41567
DC Identifier: http://oa.upm.es/41567/
OAI Identifier: oai:oa.upm.es:41567
Deposited by: Memoria Investigacion
Deposited on: 24 Jun 2016 14:54
Last Modified: 24 Jun 2016 14:54
  • Logo InvestigaM (UPM)
  • Logo GEOUP4
  • Logo Open Access
  • Open Access
  • Logo Sherpa/Romeo
    Check whether the anglo-saxon journal in which you have published an article allows you to also publish it under open access.
  • Logo Dulcinea
    Check whether the spanish journal in which you have published an article allows you to also publish it under open access.
  • Logo de Recolecta
  • Logo del Observatorio I+D+i UPM
  • Logo de OpenCourseWare UPM