Animal performance and carcass characteristics of Nellore young bulls fed coated or uncoated urea slaughtered at different weights
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 Zootecnia (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000400007 |
Resumo: | The objective of this study was to evaluate animal performance and carcass characteristics of 64 Nellore young bulls at 22 months of age finished in a feedlot and slaughtered at five body weights (350; 455; 485; 555 and 580 kg) fed diets containing coated or uncoated urea. The experimental design adopted was completely randomized, set in a 4 × 2 factorial arrangement, and for the variables assessed in the control animals, it was 5 × 2. No effect of interaction between slaughter weights and diets were observed, so the variables were analyzed separately, compared by polynomial contrasts and by the F test, respectively. The time animals remained in the feedlot to reach slaughter weights was 66, 88, 145 and 194 days. Average daily gain (ADG) showed quadratic behavior, with a maximum of 1.44 kg/day with animals of 491.7 kg. Dry matter intake (DMI) (kg/day) was similar in all the treatments, but it decreased linearly as body weight increased. The bionutritional efficiency worsened linearly as body weight rose. The elevation in slaughter weight resulted in linear decrease in the percentage of beef round and increase in forequarter. Backfat thickness and rib eye area of the longissimus increased linearly and the percentages of muscle and protein in the carcass reduced and those of fat and ether extract increased linearly as body weight increased. Average daily gain, DMI, feed efficiency and carcass characteristics were not affected by diets containing coated or uncoated urea. However, animals fed coated urea presenter better crude fiber and neutral detergent fiber intake. |
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Animal performance and carcass characteristics of Nellore young bulls fed coated or uncoated urea slaughtered at different weightsbody compositionfat thicknessfeed efficiencyfeedlotgain yieldhigh grain rationsThe objective of this study was to evaluate animal performance and carcass characteristics of 64 Nellore young bulls at 22 months of age finished in a feedlot and slaughtered at five body weights (350; 455; 485; 555 and 580 kg) fed diets containing coated or uncoated urea. The experimental design adopted was completely randomized, set in a 4 × 2 factorial arrangement, and for the variables assessed in the control animals, it was 5 × 2. No effect of interaction between slaughter weights and diets were observed, so the variables were analyzed separately, compared by polynomial contrasts and by the F test, respectively. The time animals remained in the feedlot to reach slaughter weights was 66, 88, 145 and 194 days. Average daily gain (ADG) showed quadratic behavior, with a maximum of 1.44 kg/day with animals of 491.7 kg. Dry matter intake (DMI) (kg/day) was similar in all the treatments, but it decreased linearly as body weight increased. The bionutritional efficiency worsened linearly as body weight rose. The elevation in slaughter weight resulted in linear decrease in the percentage of beef round and increase in forequarter. Backfat thickness and rib eye area of the longissimus increased linearly and the percentages of muscle and protein in the carcass reduced and those of fat and ether extract increased linearly as body weight increased. Average daily gain, DMI, feed efficiency and carcass characteristics were not affected by diets containing coated or uncoated urea. However, animals fed coated urea presenter better crude fiber and neutral detergent fiber intake.Sociedade Brasileira de Zootecnia2013-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000400007Revista Brasileira de Zootecnia v.42 n.4 2013reponame:Revista Brasileira de Zootecnia (Online)instname:Sociedade Brasileira de Zootecnia (SBZ)instacron:SBZ10.1590/S1516-35982013000400007info:eu-repo/semantics/openAccessPazdiora,Raul DirceuResende,Flávio Dutra deFaria,Marcelo Henrique deSiqueira,Gustavo RezendeAlmeida,Geraldo Benedito de SouzaSampaio,Ricardo LinharesPacheco,Paulo SantanaPrietto,Murilo Sergio Rodrigueseng2013-04-05T00:00:00Zoai:scielo:S1516-35982013000400007Revistahttps://www.rbz.org.br/pt-br/https://old.scielo.br/oai/scielo-oai.php||bz@sbz.org.br|| secretariarbz@sbz.org.br1806-92901516-3598opendoar:2013-04-05T00:00Revista Brasileira de Zootecnia (Online) - Sociedade Brasileira de Zootecnia (SBZ)false |
dc.title.none.fl_str_mv |
Animal performance and carcass characteristics of Nellore young bulls fed coated or uncoated urea slaughtered at different weights |
title |
Animal performance and carcass characteristics of Nellore young bulls fed coated or uncoated urea slaughtered at different weights |
spellingShingle |
Animal performance and carcass characteristics of Nellore young bulls fed coated or uncoated urea slaughtered at different weights Pazdiora,Raul Dirceu body composition fat thickness feed efficiency feedlot gain yield high grain rations |
title_short |
Animal performance and carcass characteristics of Nellore young bulls fed coated or uncoated urea slaughtered at different weights |
title_full |
Animal performance and carcass characteristics of Nellore young bulls fed coated or uncoated urea slaughtered at different weights |
title_fullStr |
Animal performance and carcass characteristics of Nellore young bulls fed coated or uncoated urea slaughtered at different weights |
title_full_unstemmed |
Animal performance and carcass characteristics of Nellore young bulls fed coated or uncoated urea slaughtered at different weights |
title_sort |
Animal performance and carcass characteristics of Nellore young bulls fed coated or uncoated urea slaughtered at different weights |
author |
Pazdiora,Raul Dirceu |
author_facet |
Pazdiora,Raul Dirceu Resende,Flávio Dutra de Faria,Marcelo Henrique de Siqueira,Gustavo Rezende Almeida,Geraldo Benedito de Souza Sampaio,Ricardo Linhares Pacheco,Paulo Santana Prietto,Murilo Sergio Rodrigues |
author_role |
author |
author2 |
Resende,Flávio Dutra de Faria,Marcelo Henrique de Siqueira,Gustavo Rezende Almeida,Geraldo Benedito de Souza Sampaio,Ricardo Linhares Pacheco,Paulo Santana Prietto,Murilo Sergio Rodrigues |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Pazdiora,Raul Dirceu Resende,Flávio Dutra de Faria,Marcelo Henrique de Siqueira,Gustavo Rezende Almeida,Geraldo Benedito de Souza Sampaio,Ricardo Linhares Pacheco,Paulo Santana Prietto,Murilo Sergio Rodrigues |
dc.subject.por.fl_str_mv |
body composition fat thickness feed efficiency feedlot gain yield high grain rations |
topic |
body composition fat thickness feed efficiency feedlot gain yield high grain rations |
description |
The objective of this study was to evaluate animal performance and carcass characteristics of 64 Nellore young bulls at 22 months of age finished in a feedlot and slaughtered at five body weights (350; 455; 485; 555 and 580 kg) fed diets containing coated or uncoated urea. The experimental design adopted was completely randomized, set in a 4 × 2 factorial arrangement, and for the variables assessed in the control animals, it was 5 × 2. No effect of interaction between slaughter weights and diets were observed, so the variables were analyzed separately, compared by polynomial contrasts and by the F test, respectively. The time animals remained in the feedlot to reach slaughter weights was 66, 88, 145 and 194 days. Average daily gain (ADG) showed quadratic behavior, with a maximum of 1.44 kg/day with animals of 491.7 kg. Dry matter intake (DMI) (kg/day) was similar in all the treatments, but it decreased linearly as body weight increased. The bionutritional efficiency worsened linearly as body weight rose. The elevation in slaughter weight resulted in linear decrease in the percentage of beef round and increase in forequarter. Backfat thickness and rib eye area of the longissimus increased linearly and the percentages of muscle and protein in the carcass reduced and those of fat and ether extract increased linearly as body weight increased. Average daily gain, DMI, feed efficiency and carcass characteristics were not affected by diets containing coated or uncoated urea. However, animals fed coated urea presenter better crude fiber and neutral detergent fiber intake. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-04-01 |
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=S1516-35982013000400007 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000400007 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1516-35982013000400007 |
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.42 n.4 2013 reponame:Revista Brasileira de Zootecnia (Online) instname:Sociedade Brasileira de Zootecnia (SBZ) instacron:SBZ |
instname_str |
Sociedade Brasileira de Zootecnia (SBZ) |
instacron_str |
SBZ |
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) |
repository.mail.fl_str_mv |
||bz@sbz.org.br|| secretariarbz@sbz.org.br |
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1750318150531940352 |