Effect of forced-molting methods and rearing temperatures on the performance and organ biometrics of laying hens

Detalhes bibliográficos
Autor(a) principal: Sgavioli, S. [UNESP]
Data de Publicação: 2013
Outros Autores: Filardi, R. S. [UNESP], Praes, M. F F M [UNESP], Domingues, C. H F [UNESP], Andrade, P. C. [UNESP], Pileggi, J. [UNESP], Boleli, I. C. [UNESP], Junqueira, O. M. [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1590/S1516-635X2013000300011
http://hdl.handle.net/11449/76827
Resumo: An experiment was conducted to evaluate the biometrics of organs (ovary, oviduct, liver, proventriculus and gizzard) of laying hens submitted to different forced-molting methods of molt and maintained at three different temperature. Organs were evaluated after molting and resting period. Six hundred birds were distributed according to a completely randomized experimental design in a 5x3 factorial arrangement (forced-molting methods x environmental temperatures) into 15 treatments with 5 replicates of 8 birds each. The molting methods applied were the dietary inclusion of 90%, 70%, 50% of alfalfa, 2,800 ppm zinc oxide, or total feed restriction. Birds were kept at ±20 oC, ±27 oC, or ±35 oC. Data were submitted to analysis of variance and means were compared by orthogonal and polynomial contrasts. The traditional forced-molting method (feed fasting) resulted in adequate performance. However, as the aim of the present study was to find an alternative method to feed fasting, the highest dietary alfafa inclusion level (90%) was shown to be efficient compared with other methods, particularly when hens were kept at high temperature. Therefore, this alternative forced-molting may be applied, especially when bird welfare is taken into consideration.
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spelling Effect of forced-molting methods and rearing temperatures on the performance and organ biometrics of laying hensFeed restrictionHeat stressOvaryWelfareAn experiment was conducted to evaluate the biometrics of organs (ovary, oviduct, liver, proventriculus and gizzard) of laying hens submitted to different forced-molting methods of molt and maintained at three different temperature. Organs were evaluated after molting and resting period. Six hundred birds were distributed according to a completely randomized experimental design in a 5x3 factorial arrangement (forced-molting methods x environmental temperatures) into 15 treatments with 5 replicates of 8 birds each. The molting methods applied were the dietary inclusion of 90%, 70%, 50% of alfalfa, 2,800 ppm zinc oxide, or total feed restriction. Birds were kept at ±20 oC, ±27 oC, or ±35 oC. Data were submitted to analysis of variance and means were compared by orthogonal and polynomial contrasts. The traditional forced-molting method (feed fasting) resulted in adequate performance. However, as the aim of the present study was to find an alternative method to feed fasting, the highest dietary alfafa inclusion level (90%) was shown to be efficient compared with other methods, particularly when hens were kept at high temperature. Therefore, this alternative forced-molting may be applied, especially when bird welfare is taken into consideration.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Universidade Estadual Paulista Júlio de Mesquita Filho, Jaboticabal, SPUniversidade Estadual Paulista Júlio de Mesquita Filho, Jaboticabal, SPFAPESP: 07/555970-3FAPESP: 07/56447-2FAPESP: 10/01923-7Universidade Estadual Paulista (Unesp)Sgavioli, S. [UNESP]Filardi, R. S. [UNESP]Praes, M. F F M [UNESP]Domingues, C. H F [UNESP]Andrade, P. C. [UNESP]Pileggi, J. [UNESP]Boleli, I. C. [UNESP]Junqueira, O. M. [UNESP]2014-05-27T11:30:50Z2014-05-27T11:30:50Z2013-10-10info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article239-245application/pdfhttp://dx.doi.org/10.1590/S1516-635X2013000300011Revista Brasileira de Ciencia Avicola, v. 15, n. 3, p. 239-245, 2013.1516-635Xhttp://hdl.handle.net/11449/7682710.1590/S1516-635X2013000300011S1516-635X2013000300011WOS:0003268117000112-s2.0-848850337772-s2.0-84885033777.pdf68980547187752238942267939443572Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengRevista Brasileira de Ciência Avícola0.463info:eu-repo/semantics/openAccess2024-06-06T18:42:28Zoai:repositorio.unesp.br:11449/76827Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T23:32:09.564137Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Effect of forced-molting methods and rearing temperatures on the performance and organ biometrics of laying hens
title Effect of forced-molting methods and rearing temperatures on the performance and organ biometrics of laying hens
spellingShingle Effect of forced-molting methods and rearing temperatures on the performance and organ biometrics of laying hens
Sgavioli, S. [UNESP]
Feed restriction
Heat stress
Ovary
Welfare
title_short Effect of forced-molting methods and rearing temperatures on the performance and organ biometrics of laying hens
title_full Effect of forced-molting methods and rearing temperatures on the performance and organ biometrics of laying hens
title_fullStr Effect of forced-molting methods and rearing temperatures on the performance and organ biometrics of laying hens
title_full_unstemmed Effect of forced-molting methods and rearing temperatures on the performance and organ biometrics of laying hens
title_sort Effect of forced-molting methods and rearing temperatures on the performance and organ biometrics of laying hens
author Sgavioli, S. [UNESP]
author_facet Sgavioli, S. [UNESP]
Filardi, R. S. [UNESP]
Praes, M. F F M [UNESP]
Domingues, C. H F [UNESP]
Andrade, P. C. [UNESP]
Pileggi, J. [UNESP]
Boleli, I. C. [UNESP]
Junqueira, O. M. [UNESP]
author_role author
author2 Filardi, R. S. [UNESP]
Praes, M. F F M [UNESP]
Domingues, C. H F [UNESP]
Andrade, P. C. [UNESP]
Pileggi, J. [UNESP]
Boleli, I. C. [UNESP]
Junqueira, O. M. [UNESP]
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Sgavioli, S. [UNESP]
Filardi, R. S. [UNESP]
Praes, M. F F M [UNESP]
Domingues, C. H F [UNESP]
Andrade, P. C. [UNESP]
Pileggi, J. [UNESP]
Boleli, I. C. [UNESP]
Junqueira, O. M. [UNESP]
dc.subject.por.fl_str_mv Feed restriction
Heat stress
Ovary
Welfare
topic Feed restriction
Heat stress
Ovary
Welfare
description An experiment was conducted to evaluate the biometrics of organs (ovary, oviduct, liver, proventriculus and gizzard) of laying hens submitted to different forced-molting methods of molt and maintained at three different temperature. Organs were evaluated after molting and resting period. Six hundred birds were distributed according to a completely randomized experimental design in a 5x3 factorial arrangement (forced-molting methods x environmental temperatures) into 15 treatments with 5 replicates of 8 birds each. The molting methods applied were the dietary inclusion of 90%, 70%, 50% of alfalfa, 2,800 ppm zinc oxide, or total feed restriction. Birds were kept at ±20 oC, ±27 oC, or ±35 oC. Data were submitted to analysis of variance and means were compared by orthogonal and polynomial contrasts. The traditional forced-molting method (feed fasting) resulted in adequate performance. However, as the aim of the present study was to find an alternative method to feed fasting, the highest dietary alfafa inclusion level (90%) was shown to be efficient compared with other methods, particularly when hens were kept at high temperature. Therefore, this alternative forced-molting may be applied, especially when bird welfare is taken into consideration.
publishDate 2013
dc.date.none.fl_str_mv 2013-10-10
2014-05-27T11:30:50Z
2014-05-27T11:30:50Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1590/S1516-635X2013000300011
Revista Brasileira de Ciencia Avicola, v. 15, n. 3, p. 239-245, 2013.
1516-635X
http://hdl.handle.net/11449/76827
10.1590/S1516-635X2013000300011
S1516-635X2013000300011
WOS:000326811700011
2-s2.0-84885033777
2-s2.0-84885033777.pdf
6898054718775223
8942267939443572
url http://dx.doi.org/10.1590/S1516-635X2013000300011
http://hdl.handle.net/11449/76827
identifier_str_mv Revista Brasileira de Ciencia Avicola, v. 15, n. 3, p. 239-245, 2013.
1516-635X
10.1590/S1516-635X2013000300011
S1516-635X2013000300011
WOS:000326811700011
2-s2.0-84885033777
2-s2.0-84885033777.pdf
6898054718775223
8942267939443572
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Revista Brasileira de Ciência Avícola
0.463
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 239-245
application/pdf
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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