Effects of crude protein levels on egg quality traits of brown layers raised in two production systems

Detalhes bibliográficos
Autor(a) principal: Viana,Eduardo de Faria
Data de Publicação: 2017
Outros Autores: Stringhini,José Henrique, Carvalho,Fabyola Barros de, Viana,Débora Macedo Paronetto, Costa,Miliane Alves da
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Revista Brasileira de Zootecnia (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017001100847
Resumo: ABSTRACT The objective of this study was the evaluation of egg quality of 30 to 45-week-old brown layers, raised in cages or on floor, supplemented with amino acids, using the ideal protein concept with levels of 14, 15, 16, and 18% crude protein. A total of 400 birds (Hy-sex Brown) were used, distributed into two breeding systems (conventional cage or floor). The evaluated variables were the yolk relative weight, yolk height, albumen relative weight, albumen height, specific gravity, eggshell thickness, and eggshell weight. Treatments consisted of reduced levels of crude protein and were provided to both groups equally. We adopted a completely randomized design, in a factorial scheme, composed of two breeding systems and four levels of crude protein, totaling eight treatments. Five replicates per treatment and 10 birds per experimental unit were used. The breeding system on floor was configured as an option in the breeding of brown layers, of Hy-sex Brown commercial lineage, in the period between the 30th and the 45th week of age, since it presents results equivalent to the ones obtained in the breeding system in cages, having the egg quality as parameter. The system of production on floor is configured as an option in the farming of brown layers, of the commercial lineage Hy-sex Brown.
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spelling Effects of crude protein levels on egg quality traits of brown layers raised in two production systemsbrown layercageeggfloorABSTRACT The objective of this study was the evaluation of egg quality of 30 to 45-week-old brown layers, raised in cages or on floor, supplemented with amino acids, using the ideal protein concept with levels of 14, 15, 16, and 18% crude protein. A total of 400 birds (Hy-sex Brown) were used, distributed into two breeding systems (conventional cage or floor). The evaluated variables were the yolk relative weight, yolk height, albumen relative weight, albumen height, specific gravity, eggshell thickness, and eggshell weight. Treatments consisted of reduced levels of crude protein and were provided to both groups equally. We adopted a completely randomized design, in a factorial scheme, composed of two breeding systems and four levels of crude protein, totaling eight treatments. Five replicates per treatment and 10 birds per experimental unit were used. The breeding system on floor was configured as an option in the breeding of brown layers, of Hy-sex Brown commercial lineage, in the period between the 30th and the 45th week of age, since it presents results equivalent to the ones obtained in the breeding system in cages, having the egg quality as parameter. The system of production on floor is configured as an option in the farming of brown layers, of the commercial lineage Hy-sex Brown.Sociedade Brasileira de Zootecnia2017-11-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017001100847Revista Brasileira de Zootecnia v.46 n.11 2017reponame:Revista Brasileira de Zootecnia (Online)instname:Sociedade Brasileira de Zootecnia (SBZ)instacron:SBZ10.1590/s1806-92902017001100003info:eu-repo/semantics/openAccessViana,Eduardo de FariaStringhini,José HenriqueCarvalho,Fabyola Barros deViana,Débora Macedo ParonettoCosta,Miliane Alves daeng2018-01-03T00:00:00Zoai:scielo:S1516-35982017001100847Revistahttps://www.rbz.org.br/pt-br/https://old.scielo.br/oai/scielo-oai.php||bz@sbz.org.br|| secretariarbz@sbz.org.br1806-92901516-3598opendoar:2018-01-03T00:00Revista Brasileira de Zootecnia (Online) - Sociedade Brasileira de Zootecnia (SBZ)false
dc.title.none.fl_str_mv Effects of crude protein levels on egg quality traits of brown layers raised in two production systems
title Effects of crude protein levels on egg quality traits of brown layers raised in two production systems
spellingShingle Effects of crude protein levels on egg quality traits of brown layers raised in two production systems
Viana,Eduardo de Faria
brown layer
cage
egg
floor
title_short Effects of crude protein levels on egg quality traits of brown layers raised in two production systems
title_full Effects of crude protein levels on egg quality traits of brown layers raised in two production systems
title_fullStr Effects of crude protein levels on egg quality traits of brown layers raised in two production systems
title_full_unstemmed Effects of crude protein levels on egg quality traits of brown layers raised in two production systems
title_sort Effects of crude protein levels on egg quality traits of brown layers raised in two production systems
author Viana,Eduardo de Faria
author_facet Viana,Eduardo de Faria
Stringhini,José Henrique
Carvalho,Fabyola Barros de
Viana,Débora Macedo Paronetto
Costa,Miliane Alves da
author_role author
author2 Stringhini,José Henrique
Carvalho,Fabyola Barros de
Viana,Débora Macedo Paronetto
Costa,Miliane Alves da
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Viana,Eduardo de Faria
Stringhini,José Henrique
Carvalho,Fabyola Barros de
Viana,Débora Macedo Paronetto
Costa,Miliane Alves da
dc.subject.por.fl_str_mv brown layer
cage
egg
floor
topic brown layer
cage
egg
floor
description ABSTRACT The objective of this study was the evaluation of egg quality of 30 to 45-week-old brown layers, raised in cages or on floor, supplemented with amino acids, using the ideal protein concept with levels of 14, 15, 16, and 18% crude protein. A total of 400 birds (Hy-sex Brown) were used, distributed into two breeding systems (conventional cage or floor). The evaluated variables were the yolk relative weight, yolk height, albumen relative weight, albumen height, specific gravity, eggshell thickness, and eggshell weight. Treatments consisted of reduced levels of crude protein and were provided to both groups equally. We adopted a completely randomized design, in a factorial scheme, composed of two breeding systems and four levels of crude protein, totaling eight treatments. Five replicates per treatment and 10 birds per experimental unit were used. The breeding system on floor was configured as an option in the breeding of brown layers, of Hy-sex Brown commercial lineage, in the period between the 30th and the 45th week of age, since it presents results equivalent to the ones obtained in the breeding system in cages, having the egg quality as parameter. The system of production on floor is configured as an option in the farming of brown layers, of the commercial lineage Hy-sex Brown.
publishDate 2017
dc.date.none.fl_str_mv 2017-11-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017001100847
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017001100847
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/s1806-92902017001100003
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Zootecnia
publisher.none.fl_str_mv Sociedade Brasileira de Zootecnia
dc.source.none.fl_str_mv Revista Brasileira de Zootecnia v.46 n.11 2017
reponame:Revista Brasileira de Zootecnia (Online)
instname:Sociedade Brasileira de Zootecnia (SBZ)
instacron:SBZ
instname_str Sociedade Brasileira de Zootecnia (SBZ)
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institution SBZ
reponame_str Revista Brasileira de Zootecnia (Online)
collection Revista Brasileira de Zootecnia (Online)
repository.name.fl_str_mv Revista Brasileira de Zootecnia (Online) - Sociedade Brasileira de Zootecnia (SBZ)
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