Effect of digestible threonine level of dietar on productivo performance, commercial ego grading and ego Quality of 55 to 61 week-old playing heno

Callejo Ramos, Antonio and Dos Santos, Andrea Luciana and Nicodemus Martin, Nuria and Gutiérrez del Alamo, A. and Buxade Carbo, Carlos and Borges Amorim, Alessandro and Dib Saleh, Mayra Anton (2017). Effect of digestible threonine level of dietar on productivo performance, commercial ego grading and ego Quality of 55 to 61 week-old playing heno. "Journal of Veterinary Health Care", v. 1 (n. 2); pp. 18-25. ISSN 2575-1212. https://doi.org/10.14302/issn.2575-1212.jvhc-17-1795.

Description

Title: Effect of digestible threonine level of dietar on productivo performance, commercial ego grading and ego Quality of 55 to 61 week-old playing heno
Author/s:
  • Callejo Ramos, Antonio
  • Dos Santos, Andrea Luciana
  • Nicodemus Martin, Nuria
  • Gutiérrez del Alamo, A.
  • Buxade Carbo, Carlos
  • Borges Amorim, Alessandro
  • Dib Saleh, Mayra Anton
Item Type: Article
Título de Revista/Publicación: Journal of Veterinary Health Care
Date: 2017
Volume: 1
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 aim of this study was to establish the digestible threonine (dig. Thr) requirements and the ideal proportion between Thr and Lys for Isa Brown laying hens on productive traits and egg quality characteristics from 55- to 58- and 59- to 61 weeks of age. Increased levels of L-Thr were added to a basal diet that contained 3.7 g/kg of dig. Thr. Therefore, diets containing 3.7, 4.0, 4.3, 4.6, 4.9 and 5.2 g/kg of dig. Thr and a relation between Thr and Lys of 0.58, 0.63, 0.67, 0.72, 0.77 and 0.81, respectively were provided to laying hens. A total of 216 hens were distributed in a randomized design among the 6 experimental diets. There were 9 replicates per treatment, and 4 birds per replicate. Data were analyzed by repeated measures analysis using the MIXED procedure of SAS. The main effects (dig. Thr level and experimental period) and their interaction were studied. Neither the dig. Thr level nor the experimental period had effect on performance traits and egg quality. Also, commercial egg grading was not influenced by period. However, there was a quadratic effect (P<0.001) of dig. Thr level within each scale egg weight. In conclusion, diets containing more than 3.7 g/kg of dig. Thr do not improve laying hens productivity at 55- to 61-week-old.

More information

Item ID: 49469
DC Identifier: http://oa.upm.es/49469/
OAI Identifier: oai:oa.upm.es:49469
DOI: 10.14302/issn.2575-1212.jvhc-17-1795
Official URL: https://openaccesspub.org/jvhc/article/624#idm1851276636
Deposited by: Memoria Investigacion
Deposited on: 22 Feb 2018 10:11
Last Modified: 19 Mar 2019 14:32
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