Influence of feed form and energy concentration of the rearing phase diets on productivity, digestive tract development and body measurements of brown-egg laying hens fed diets varying in energy concentration from 17 to 46wk of age

Saldaña Mancebo, Beatriz and Gewehr, C. E. and Guzmán Medina, María del Pilar and García, J. and Gonzalez Mateos, Gonzalo (2016). Influence of feed form and energy concentration of the rearing phase diets on productivity, digestive tract development and body measurements of brown-egg laying hens fed diets varying in energy concentration from 17 to 46wk of age. "Animal Feed Science And Technology", v. 221 ; pp. 87-100. ISSN 0377-8401. https://doi.org/10.1016/j.anifeedsci.2016.08.025.

Description

Title: Influence of feed form and energy concentration of the rearing phase diets on productivity, digestive tract development and body measurements of brown-egg laying hens fed diets varying in energy concentration from 17 to 46wk of age
Author/s:
  • Saldaña Mancebo, Beatriz
  • Gewehr, C. E.
  • Guzmán Medina, María del Pilar
  • García, J.
  • Gonzalez Mateos, Gonzalo
Item Type: Article
Título de Revista/Publicación: Animal Feed Science And Technology
Date: November 2016
ISSN: 0377-8401
Volume: 221
Subjects:
Faculty: E.T.S. de Ingeniería Agronómica, Alimentaria y de Biosistemas (UPM)
Department: Producción Agraria
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The influence of feed form and energy content of the rearing phase diets on hen productivity,gastrointestinal tract (GIT) traits and body measurements was studied in brown-egg layinghens fed diets differing in energy concentration from 17 to 46 wk of age. The experimentwas completely randomized with 12 treatments arranged as a (2 × 3) × 2 factorial with twofeed forms (mash vs. crumbles) and three AMEnconcentrations of the rearing phase diets(low, medium and high) and two AMEnconcentrations (11.10 vs. 11.52 MJ/kg) of the layingphase diets. The AMEnof the rearing phase diets differed in 0.42 MJ/kg in all three periods(1?5 wk, 5?10 wk and 10?17 wk of age). Hen productivity was determined from 17 to 46wk and GIT and body traits were measured at 46 wk of age. The characteristics of the rearingphase diets did not affect any of the production, GIT traits or body measurements studiedduring the laying phase, except body weight gain (BWG) from 17 to 46 wk of age that washigher (P < 0.01) in hens that were fed mash during the rearing phase than in hens thatwere fed crumbles. An increase in the energy content of the laying phase diet from 11.10to 11.52 MJ AMEn/kg reduced feed intake (P < 0.001) and improved feed conversion ratio(P < 0.001) from 17 to 46 wk and reduced gizzard contents (P < 0.01) at 46 wk of age butdid not affect any of the other production trait studied. The characteristics of the rearingand laying hen diets did not affect any of the GIT traits or body measurements at 46 wk ofage. Body weight of the hens was positively (P < 0.001) related with body length, body massindex, tarsus length and tarsus diameter at this age. The data indicate that neither feed formnor energy concentration of the rearing phase diets affected subsequent hen performance.An increase in the AMEncontent of the layer diet from 11.10 to 11.52 MJ/kg decreased feedintake and improved feed conversion ratio but did not affect hen production or egg quality.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainAGL 2014-56139UnspecifiedUnspecifiedUnspecified

More information

Item ID: 45023
DC Identifier: http://oa.upm.es/45023/
OAI Identifier: oai:oa.upm.es:45023
DOI: 10.1016/j.anifeedsci.2016.08.025
Official URL: http://www.sciencedirect.com/science/article/pii/S0377840116305806
Deposited by: Memoria Investigacion
Deposited on: 31 Mar 2017 15:19
Last Modified: 19 Mar 2019 14:03
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