Quantitative feed restriction from 35 to 42 days of age for broiler chickens
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Revista Brasileira de Saúde e Produção Animal |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1519-99402013000400011 |
Resumo: | The objective of this study was to evaluate the effect of increasing levels of feed restriction in broilers aged from 35 to 42 days, on the performance, carcass parameters and intensity of lesions at slaughter. A total of 1,225 one-day old chicks were obtained from a commercial hatchery and were grown over a 34-days period (five weeks). At 34 days of age all birds were weighed and redistributed into a completely randomized design to perform the following treatments: control (0% feed restriction), 10, 20, 30 or 40% feed restriction. The amount of feed given to animals was adjusted daily according to the previous day's intake of the control treatment. At 42 days, birds were weighed and two birds per pen were slaughtered, one to evaluate carcass yield and cuts and the other for body composition analysis. Weight gain and feed intake were decreased linearly (p<0.05) according to increasing levels of restriction, while the feed:gain ratio showed a quadratic effect (p<0.05). The hot eviscerated carcass weight decreased linearly (p<0.05) according to increasing levels of restriction, without effects on the carcass, breast and thigh yield. The dry matter and fat of the carcass decreased and the crude protein increased (p<0.05), according to levels of restriction. We conclude that feed restriction of 2.5% in the last week of life can improve the feed efficiency of poultry, when there is a higher accumulation of fat in the carcass. |
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Quantitative feed restriction from 35 to 42 days of age for broiler chickensbody composition of chickenscarcass yieldfeed managementThe objective of this study was to evaluate the effect of increasing levels of feed restriction in broilers aged from 35 to 42 days, on the performance, carcass parameters and intensity of lesions at slaughter. A total of 1,225 one-day old chicks were obtained from a commercial hatchery and were grown over a 34-days period (five weeks). At 34 days of age all birds were weighed and redistributed into a completely randomized design to perform the following treatments: control (0% feed restriction), 10, 20, 30 or 40% feed restriction. The amount of feed given to animals was adjusted daily according to the previous day's intake of the control treatment. At 42 days, birds were weighed and two birds per pen were slaughtered, one to evaluate carcass yield and cuts and the other for body composition analysis. Weight gain and feed intake were decreased linearly (p<0.05) according to increasing levels of restriction, while the feed:gain ratio showed a quadratic effect (p<0.05). The hot eviscerated carcass weight decreased linearly (p<0.05) according to increasing levels of restriction, without effects on the carcass, breast and thigh yield. The dry matter and fat of the carcass decreased and the crude protein increased (p<0.05), according to levels of restriction. We conclude that feed restriction of 2.5% in the last week of life can improve the feed efficiency of poultry, when there is a higher accumulation of fat in the carcass.UFBA - Universidade Federal da Bahia2013-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1519-99402013000400011Revista Brasileira de Saúde e Produção Animal v.14 n.4 2013reponame:Revista Brasileira de Saúde e Produção Animalinstname:Universidade Federal da Bahia (UFBA)instacron:UFBA10.1590/S1519-99402013000400011info:eu-repo/semantics/openAccessBortoluzzi,CristianoFernandes,Jovanir Inês MüllerContini,Jean PauloGurski,Tiago JacobEsser,Aline Fernanda GonçalvesProkoski,Kareneng2015-02-02T00:00:00Zoai:scielo:S1519-99402013000400011Revistahttp://www.rbspa.ufba.br/PUBhttps://old.scielo.br/oai/scielo-oai.php||rbspa@ufba.br1519-99401519-9940opendoar:2015-02-02T00:00Revista Brasileira de Saúde e Produção Animal - Universidade Federal da Bahia (UFBA)false |
dc.title.none.fl_str_mv |
Quantitative feed restriction from 35 to 42 days of age for broiler chickens |
title |
Quantitative feed restriction from 35 to 42 days of age for broiler chickens |
spellingShingle |
Quantitative feed restriction from 35 to 42 days of age for broiler chickens Bortoluzzi,Cristiano body composition of chickens carcass yield feed management |
title_short |
Quantitative feed restriction from 35 to 42 days of age for broiler chickens |
title_full |
Quantitative feed restriction from 35 to 42 days of age for broiler chickens |
title_fullStr |
Quantitative feed restriction from 35 to 42 days of age for broiler chickens |
title_full_unstemmed |
Quantitative feed restriction from 35 to 42 days of age for broiler chickens |
title_sort |
Quantitative feed restriction from 35 to 42 days of age for broiler chickens |
author |
Bortoluzzi,Cristiano |
author_facet |
Bortoluzzi,Cristiano Fernandes,Jovanir Inês Müller Contini,Jean Paulo Gurski,Tiago Jacob Esser,Aline Fernanda Gonçalves Prokoski,Karen |
author_role |
author |
author2 |
Fernandes,Jovanir Inês Müller Contini,Jean Paulo Gurski,Tiago Jacob Esser,Aline Fernanda Gonçalves Prokoski,Karen |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Bortoluzzi,Cristiano Fernandes,Jovanir Inês Müller Contini,Jean Paulo Gurski,Tiago Jacob Esser,Aline Fernanda Gonçalves Prokoski,Karen |
dc.subject.por.fl_str_mv |
body composition of chickens carcass yield feed management |
topic |
body composition of chickens carcass yield feed management |
description |
The objective of this study was to evaluate the effect of increasing levels of feed restriction in broilers aged from 35 to 42 days, on the performance, carcass parameters and intensity of lesions at slaughter. A total of 1,225 one-day old chicks were obtained from a commercial hatchery and were grown over a 34-days period (five weeks). At 34 days of age all birds were weighed and redistributed into a completely randomized design to perform the following treatments: control (0% feed restriction), 10, 20, 30 or 40% feed restriction. The amount of feed given to animals was adjusted daily according to the previous day's intake of the control treatment. At 42 days, birds were weighed and two birds per pen were slaughtered, one to evaluate carcass yield and cuts and the other for body composition analysis. Weight gain and feed intake were decreased linearly (p<0.05) according to increasing levels of restriction, while the feed:gain ratio showed a quadratic effect (p<0.05). The hot eviscerated carcass weight decreased linearly (p<0.05) according to increasing levels of restriction, without effects on the carcass, breast and thigh yield. The dry matter and fat of the carcass decreased and the crude protein increased (p<0.05), according to levels of restriction. We conclude that feed restriction of 2.5% in the last week of life can improve the feed efficiency of poultry, when there is a higher accumulation of fat in the carcass. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-12-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1519-99402013000400011 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1519-99402013000400011 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1519-99402013000400011 |
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 |
UFBA - Universidade Federal da Bahia |
publisher.none.fl_str_mv |
UFBA - Universidade Federal da Bahia |
dc.source.none.fl_str_mv |
Revista Brasileira de Saúde e Produção Animal v.14 n.4 2013 reponame:Revista Brasileira de Saúde e Produção Animal instname:Universidade Federal da Bahia (UFBA) instacron:UFBA |
instname_str |
Universidade Federal da Bahia (UFBA) |
instacron_str |
UFBA |
institution |
UFBA |
reponame_str |
Revista Brasileira de Saúde e Produção Animal |
collection |
Revista Brasileira de Saúde e Produção Animal |
repository.name.fl_str_mv |
Revista Brasileira de Saúde e Produção Animal - Universidade Federal da Bahia (UFBA) |
repository.mail.fl_str_mv |
||rbspa@ufba.br |
_version_ |
1750297506830352384 |