Performance of brown layers fed reduced dietary protein levels in two rearing systems

Detalhes bibliográficos
Autor(a) principal: Viana,Eduardo de Faria
Data de Publicação: 2020
Outros Autores: Souza,Wesley José de, Costa,Miliane Alves da, Arnhold,Emmanuel, Carvalho,Fabyola Barros de, Mello,Heloisa Helena de Carvalho, Café,Marcos Barcellos, Stringhini,José Henrique
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=S1516-35982020000100609
Resumo: ABSTRACT An experiment was conducted aiming to evaluate the effect of different levels of crude protein, based on the ideal protein concept and two rearing systems, on productive performance of brown laying hens. A total of 400 Hisex Brown laying hens between 30 and 45 weeks of age were distributed in a completely randomized design and a 2×4 factorial arrangement, with main effects including two rearing systems (cage and floor) and levels of crude protein (140, 150, 160, and 180 g kg−1), totalizing eight treatments. Five replicates with 10 birds each were used per experimental unit. The following parameters were evaluated: egg production, feed intake, body weight gain, feed conversion ratio, and quality traits such as dirty, cracked, or broken eggs. No interaction effect was observed between dietary protein levels and rearing systems for body weight gain, feed intake, egg production, egg weight, and feed conversion ratio. Feed intake and egg production were higher in the floor rearing system. Feed conversion ratio (kg/dz) was improved in birds reared in the cage system. The rate of cracked and broken eggs was higher in the cage system. The layers reared in the floor system produced a higher percentage of dirty eggs. The dietary protein level did not affect the evaluated parameters. Thus, we conclude that a floor rearing system is an option for layers, and the dietary protein level can be reduced up to 140 g kg−1 for Hisex Brown hens from 30 to 45 weeks of age.
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spelling Performance of brown layers fed reduced dietary protein levels in two rearing systemseggideal protein levellitterproductivityrearing systemwelfareABSTRACT An experiment was conducted aiming to evaluate the effect of different levels of crude protein, based on the ideal protein concept and two rearing systems, on productive performance of brown laying hens. A total of 400 Hisex Brown laying hens between 30 and 45 weeks of age were distributed in a completely randomized design and a 2×4 factorial arrangement, with main effects including two rearing systems (cage and floor) and levels of crude protein (140, 150, 160, and 180 g kg−1), totalizing eight treatments. Five replicates with 10 birds each were used per experimental unit. The following parameters were evaluated: egg production, feed intake, body weight gain, feed conversion ratio, and quality traits such as dirty, cracked, or broken eggs. No interaction effect was observed between dietary protein levels and rearing systems for body weight gain, feed intake, egg production, egg weight, and feed conversion ratio. Feed intake and egg production were higher in the floor rearing system. Feed conversion ratio (kg/dz) was improved in birds reared in the cage system. The rate of cracked and broken eggs was higher in the cage system. The layers reared in the floor system produced a higher percentage of dirty eggs. The dietary protein level did not affect the evaluated parameters. Thus, we conclude that a floor rearing system is an option for layers, and the dietary protein level can be reduced up to 140 g kg−1 for Hisex Brown hens from 30 to 45 weeks of age.Sociedade Brasileira de Zootecnia2020-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982020000100609Revista Brasileira de Zootecnia v.49 2020reponame:Revista Brasileira de Zootecnia (Online)instname:Sociedade Brasileira de Zootecnia (SBZ)instacron:SBZ10.37496/rbz4920200063info:eu-repo/semantics/openAccessViana,Eduardo de FariaSouza,Wesley José deCosta,Miliane Alves daArnhold,EmmanuelCarvalho,Fabyola Barros deMello,Heloisa Helena de CarvalhoCafé,Marcos BarcellosStringhini,José Henriqueeng2020-08-18T00:00:00Zoai:scielo:S1516-35982020000100609Revistahttps://www.rbz.org.br/pt-br/https://old.scielo.br/oai/scielo-oai.php||bz@sbz.org.br|| secretariarbz@sbz.org.br1806-92901516-3598opendoar:2020-08-18T00:00Revista Brasileira de Zootecnia (Online) - Sociedade Brasileira de Zootecnia (SBZ)false
dc.title.none.fl_str_mv Performance of brown layers fed reduced dietary protein levels in two rearing systems
title Performance of brown layers fed reduced dietary protein levels in two rearing systems
spellingShingle Performance of brown layers fed reduced dietary protein levels in two rearing systems
Viana,Eduardo de Faria
egg
ideal protein level
litter
productivity
rearing system
welfare
title_short Performance of brown layers fed reduced dietary protein levels in two rearing systems
title_full Performance of brown layers fed reduced dietary protein levels in two rearing systems
title_fullStr Performance of brown layers fed reduced dietary protein levels in two rearing systems
title_full_unstemmed Performance of brown layers fed reduced dietary protein levels in two rearing systems
title_sort Performance of brown layers fed reduced dietary protein levels in two rearing systems
author Viana,Eduardo de Faria
author_facet Viana,Eduardo de Faria
Souza,Wesley José de
Costa,Miliane Alves da
Arnhold,Emmanuel
Carvalho,Fabyola Barros de
Mello,Heloisa Helena de Carvalho
Café,Marcos Barcellos
Stringhini,José Henrique
author_role author
author2 Souza,Wesley José de
Costa,Miliane Alves da
Arnhold,Emmanuel
Carvalho,Fabyola Barros de
Mello,Heloisa Helena de Carvalho
Café,Marcos Barcellos
Stringhini,José Henrique
author2_role author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Viana,Eduardo de Faria
Souza,Wesley José de
Costa,Miliane Alves da
Arnhold,Emmanuel
Carvalho,Fabyola Barros de
Mello,Heloisa Helena de Carvalho
Café,Marcos Barcellos
Stringhini,José Henrique
dc.subject.por.fl_str_mv egg
ideal protein level
litter
productivity
rearing system
welfare
topic egg
ideal protein level
litter
productivity
rearing system
welfare
description ABSTRACT An experiment was conducted aiming to evaluate the effect of different levels of crude protein, based on the ideal protein concept and two rearing systems, on productive performance of brown laying hens. A total of 400 Hisex Brown laying hens between 30 and 45 weeks of age were distributed in a completely randomized design and a 2×4 factorial arrangement, with main effects including two rearing systems (cage and floor) and levels of crude protein (140, 150, 160, and 180 g kg−1), totalizing eight treatments. Five replicates with 10 birds each were used per experimental unit. The following parameters were evaluated: egg production, feed intake, body weight gain, feed conversion ratio, and quality traits such as dirty, cracked, or broken eggs. No interaction effect was observed between dietary protein levels and rearing systems for body weight gain, feed intake, egg production, egg weight, and feed conversion ratio. Feed intake and egg production were higher in the floor rearing system. Feed conversion ratio (kg/dz) was improved in birds reared in the cage system. The rate of cracked and broken eggs was higher in the cage system. The layers reared in the floor system produced a higher percentage of dirty eggs. The dietary protein level did not affect the evaluated parameters. Thus, we conclude that a floor rearing system is an option for layers, and the dietary protein level can be reduced up to 140 g kg−1 for Hisex Brown hens from 30 to 45 weeks of age.
publishDate 2020
dc.date.none.fl_str_mv 2020-01-01
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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dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982020000100609
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982020000100609
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.37496/rbz4920200063
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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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.49 2020
reponame:Revista Brasileira de Zootecnia (Online)
instname:Sociedade Brasileira de Zootecnia (SBZ)
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instname_str Sociedade Brasileira de Zootecnia (SBZ)
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reponame_str Revista Brasileira de Zootecnia (Online)
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