Effect of different levels of urea added to a mineral salt mixture upon the intake and digestibility of two tropical grass hays

Detalhes bibliográficos
Autor(a) principal: Silva, José Marques da
Data de Publicação: 2014
Outros Autores: Thiago, Luiz Roberto Lopes de S., Cardoso, Esther Guimarães
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/14843
Resumo: The effect of urea suplementation on intake and digestibility of jaraguá grass (Hyparrhenia rufa (Ness), Stapf.) and Brachiaria grass (Brachiariaruziensis, Germain & Evrard) hays was studied with 25 Nelore (Zebu) steers in a completely randomized design. Steers were housed in individual pens where they received free choice the treatments consisting of mineral mix plus zero, 20%, 40%, 60% or 80% urea in two trials of 56 and 49 days. Dry matter, organic matter, acid detergent fiber and gross energy digestibility remained the same for all treatments. Crude protein intake, protein digestibility as well as nitrogen retention were increased in the urea supplemented groups as compared to controls. Dry matter, digestible organic matter and metabolizable energy intakes from jaraguá hay (5,3% CP) increased in the urea supplemented groups but no such effect was observed with Brachiaria hay (8,4% CP).
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spelling Effect of different levels of urea added to a mineral salt mixture upon the intake and digestibility of two tropical grass haysEfeito de diferentes níveis de uréia, adicionada ao sal mineral sobre o consumo e digestibilidade de dois fenos de gramíneas tropicaisnon proteic nitrogen; supplementation; Hyparrhenia rufa; Brachiaria ruziziensis; steers; nelorenitrogônio não-protéico; suplementação; Hyparrhenia rufa; Brachiaria ruziziensis; novilho; NeloreThe effect of urea suplementation on intake and digestibility of jaraguá grass (Hyparrhenia rufa (Ness), Stapf.) and Brachiaria grass (Brachiariaruziensis, Germain & Evrard) hays was studied with 25 Nelore (Zebu) steers in a completely randomized design. Steers were housed in individual pens where they received free choice the treatments consisting of mineral mix plus zero, 20%, 40%, 60% or 80% urea in two trials of 56 and 49 days. Dry matter, organic matter, acid detergent fiber and gross energy digestibility remained the same for all treatments. Crude protein intake, protein digestibility as well as nitrogen retention were increased in the urea supplemented groups as compared to controls. Dry matter, digestible organic matter and metabolizable energy intakes from jaraguá hay (5,3% CP) increased in the urea supplemented groups but no such effect was observed with Brachiaria hay (8,4% CP).Foram conduzidos dois ensaios, com 25 novilhos Nelore estabulados com o objetivo de estudar o efeito da uréia sobre o consumo e a digestibilidade de fenos de capim-jaraguá (Hyparrhenia rufa, (Ness) Stapf.) e de capim-braquiária (Brachiaria ruziziensis, Gemam & Evrard). Foi utilizado o delineamento inteiramente casualizado com cinco tratamentos e cinco repetições. Os tratamentos consistiram de níveis de uréia (zero, 20%, 40%, 60% e 80%) adicionados à mistura mineral e os ensaios tiveram duração de 56 e 49 dias. Os coeficientes de digestibilidade da matéria seca (MS), da matéria orgânica (MO), da fibra em detergente ácido e da energia bruta permaneceram inalterados com a suplementação com uréia. Para ambos os fenos foram observados aumentos nos coeficientes de digestibilidade e nos consumos de proteína bruta (PB) e maiores retenções de nitrogênio em consequência da suplementação. No caso do feno de jaraguá (5,3% de PB), houve aumento nos consumos de MS, de MO digestível e de energia metabolizável pela suplementação. Com o feno de braquiária (8,4% de PB) não houve efeito da uréia em tais parâmetros.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraSilva, José Marques daThiago, Luiz Roberto Lopes de S.Cardoso, Esther Guimarães2014-04-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/14843Pesquisa Agropecuaria Brasileira; v.22, n.09/10, set./out. 1987; 1075-1083Pesquisa Agropecuária Brasileira; v.22, n.09/10, set./out. 1987; 1075-10831678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/14843/8538info:eu-repo/semantics/openAccess2014-10-10T19:32:40Zoai:ojs.seer.sct.embrapa.br:article/14843Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-10-10T19:32:40Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Effect of different levels of urea added to a mineral salt mixture upon the intake and digestibility of two tropical grass hays
Efeito de diferentes níveis de uréia, adicionada ao sal mineral sobre o consumo e digestibilidade de dois fenos de gramíneas tropicais
title Effect of different levels of urea added to a mineral salt mixture upon the intake and digestibility of two tropical grass hays
spellingShingle Effect of different levels of urea added to a mineral salt mixture upon the intake and digestibility of two tropical grass hays
Silva, José Marques da
non proteic nitrogen; supplementation; Hyparrhenia rufa; Brachiaria ruziziensis; steers; nelore
nitrogônio não-protéico; suplementação; Hyparrhenia rufa; Brachiaria ruziziensis; novilho; Nelore
title_short Effect of different levels of urea added to a mineral salt mixture upon the intake and digestibility of two tropical grass hays
title_full Effect of different levels of urea added to a mineral salt mixture upon the intake and digestibility of two tropical grass hays
title_fullStr Effect of different levels of urea added to a mineral salt mixture upon the intake and digestibility of two tropical grass hays
title_full_unstemmed Effect of different levels of urea added to a mineral salt mixture upon the intake and digestibility of two tropical grass hays
title_sort Effect of different levels of urea added to a mineral salt mixture upon the intake and digestibility of two tropical grass hays
author Silva, José Marques da
author_facet Silva, José Marques da
Thiago, Luiz Roberto Lopes de S.
Cardoso, Esther Guimarães
author_role author
author2 Thiago, Luiz Roberto Lopes de S.
Cardoso, Esther Guimarães
author2_role author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Silva, José Marques da
Thiago, Luiz Roberto Lopes de S.
Cardoso, Esther Guimarães
dc.subject.por.fl_str_mv non proteic nitrogen; supplementation; Hyparrhenia rufa; Brachiaria ruziziensis; steers; nelore
nitrogônio não-protéico; suplementação; Hyparrhenia rufa; Brachiaria ruziziensis; novilho; Nelore
topic non proteic nitrogen; supplementation; Hyparrhenia rufa; Brachiaria ruziziensis; steers; nelore
nitrogônio não-protéico; suplementação; Hyparrhenia rufa; Brachiaria ruziziensis; novilho; Nelore
description The effect of urea suplementation on intake and digestibility of jaraguá grass (Hyparrhenia rufa (Ness), Stapf.) and Brachiaria grass (Brachiariaruziensis, Germain & Evrard) hays was studied with 25 Nelore (Zebu) steers in a completely randomized design. Steers were housed in individual pens where they received free choice the treatments consisting of mineral mix plus zero, 20%, 40%, 60% or 80% urea in two trials of 56 and 49 days. Dry matter, organic matter, acid detergent fiber and gross energy digestibility remained the same for all treatments. Crude protein intake, protein digestibility as well as nitrogen retention were increased in the urea supplemented groups as compared to controls. Dry matter, digestible organic matter and metabolizable energy intakes from jaraguá hay (5,3% CP) increased in the urea supplemented groups but no such effect was observed with Brachiaria hay (8,4% CP).
publishDate 2014
dc.date.none.fl_str_mv 2014-04-17
dc.type.none.fl_str_mv
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/14843
url https://seer.sct.embrapa.br/index.php/pab/article/view/14843
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/14843/8538
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
dc.source.none.fl_str_mv Pesquisa Agropecuaria Brasileira; v.22, n.09/10, set./out. 1987; 1075-1083
Pesquisa Agropecuária Brasileira; v.22, n.09/10, set./out. 1987; 1075-1083
1678-3921
0100-104x
reponame:Pesquisa Agropecuária Brasileira (Online)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Pesquisa Agropecuária Brasileira (Online)
collection Pesquisa Agropecuária Brasileira (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pab@sct.embrapa.br || sct.pab@embrapa.br
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