Performance of Santa Ines lambs fed diets of variable crude protein levels

Detalhes bibliográficos
Autor(a) principal: Rocha,Márcia Helena Machado da
Data de Publicação: 2004
Outros Autores: Susin,Ivanete, Pires,Alexandre Vaz, Fernandes Jr.,Jalme de Souza, Mendes,Clayton Quirino
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Scientia Agrícola (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000200003
Resumo: Differences among dietary protein levels suggested in the literature point out to the need for better evaluation of protein requirements of growing lambs, raised in drylot on a high-concentrate diet. This study evaluates the influence of crude protein (CP) levels in high concentrate diets on performance and carcass traits of ram lambs, confined for 56 days. Forty eight (48) Santa Ines lambs (initial body weight 18.4 ± 0.4 kg; 86 ± 2 days old) were fed 4 experimental diets containing 14, 16, 18 or 20% CP, in a completely randomized block design. Diets consisted of 80% concentrate and 20% sugarcane bagasse. There were no differences in average daily gain: values of 228, 220, 230 and 231 g d-1 were obtained for diets containing 14, 16, 18 and 20% CP, respectively. There were no differences in dry matter intake and feed conversion: values were 1.03; 1.02; 1.08 and 1.10 kg d-1; 4.19; 4.28; 4.35 and 4.44 kg DM kg-1 gain for diets with 14, 16, 18 and 20% CP, respectively. Plasma urea nitrogen concentrations increased linearly as diets contained more CP. There were no differences in carcass traits.
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spelling Performance of Santa Ines lambs fed diets of variable crude protein levelscarcassdrylothair sheephigh grain dietDifferences among dietary protein levels suggested in the literature point out to the need for better evaluation of protein requirements of growing lambs, raised in drylot on a high-concentrate diet. This study evaluates the influence of crude protein (CP) levels in high concentrate diets on performance and carcass traits of ram lambs, confined for 56 days. Forty eight (48) Santa Ines lambs (initial body weight 18.4 ± 0.4 kg; 86 ± 2 days old) were fed 4 experimental diets containing 14, 16, 18 or 20% CP, in a completely randomized block design. Diets consisted of 80% concentrate and 20% sugarcane bagasse. There were no differences in average daily gain: values of 228, 220, 230 and 231 g d-1 were obtained for diets containing 14, 16, 18 and 20% CP, respectively. There were no differences in dry matter intake and feed conversion: values were 1.03; 1.02; 1.08 and 1.10 kg d-1; 4.19; 4.28; 4.35 and 4.44 kg DM kg-1 gain for diets with 14, 16, 18 and 20% CP, respectively. Plasma urea nitrogen concentrations increased linearly as diets contained more CP. There were no differences in carcass traits.Escola Superior de Agricultura "Luiz de Queiroz"2004-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000200003Scientia Agricola v.61 n.2 2004reponame:Scientia Agrícola (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S0103-90162004000200003info:eu-repo/semantics/openAccessRocha,Márcia Helena Machado daSusin,IvanetePires,Alexandre VazFernandes Jr.,Jalme de SouzaMendes,Clayton Quirinoeng2004-05-14T00:00:00Zoai:scielo:S0103-90162004000200003Revistahttp://revistas.usp.br/sa/indexPUBhttps://old.scielo.br/oai/scielo-oai.phpscientia@usp.br||alleoni@usp.br1678-992X0103-9016opendoar:2004-05-14T00:00Scientia Agrícola (Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Performance of Santa Ines lambs fed diets of variable crude protein levels
title Performance of Santa Ines lambs fed diets of variable crude protein levels
spellingShingle Performance of Santa Ines lambs fed diets of variable crude protein levels
Rocha,Márcia Helena Machado da
carcass
drylot
hair sheep
high grain diet
title_short Performance of Santa Ines lambs fed diets of variable crude protein levels
title_full Performance of Santa Ines lambs fed diets of variable crude protein levels
title_fullStr Performance of Santa Ines lambs fed diets of variable crude protein levels
title_full_unstemmed Performance of Santa Ines lambs fed diets of variable crude protein levels
title_sort Performance of Santa Ines lambs fed diets of variable crude protein levels
author Rocha,Márcia Helena Machado da
author_facet Rocha,Márcia Helena Machado da
Susin,Ivanete
Pires,Alexandre Vaz
Fernandes Jr.,Jalme de Souza
Mendes,Clayton Quirino
author_role author
author2 Susin,Ivanete
Pires,Alexandre Vaz
Fernandes Jr.,Jalme de Souza
Mendes,Clayton Quirino
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Rocha,Márcia Helena Machado da
Susin,Ivanete
Pires,Alexandre Vaz
Fernandes Jr.,Jalme de Souza
Mendes,Clayton Quirino
dc.subject.por.fl_str_mv carcass
drylot
hair sheep
high grain diet
topic carcass
drylot
hair sheep
high grain diet
description Differences among dietary protein levels suggested in the literature point out to the need for better evaluation of protein requirements of growing lambs, raised in drylot on a high-concentrate diet. This study evaluates the influence of crude protein (CP) levels in high concentrate diets on performance and carcass traits of ram lambs, confined for 56 days. Forty eight (48) Santa Ines lambs (initial body weight 18.4 ± 0.4 kg; 86 ± 2 days old) were fed 4 experimental diets containing 14, 16, 18 or 20% CP, in a completely randomized block design. Diets consisted of 80% concentrate and 20% sugarcane bagasse. There were no differences in average daily gain: values of 228, 220, 230 and 231 g d-1 were obtained for diets containing 14, 16, 18 and 20% CP, respectively. There were no differences in dry matter intake and feed conversion: values were 1.03; 1.02; 1.08 and 1.10 kg d-1; 4.19; 4.28; 4.35 and 4.44 kg DM kg-1 gain for diets with 14, 16, 18 and 20% CP, respectively. Plasma urea nitrogen concentrations increased linearly as diets contained more CP. There were no differences in carcass traits.
publishDate 2004
dc.date.none.fl_str_mv 2004-04-01
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=S0103-90162004000200003
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000200003
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-90162004000200003
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 Escola Superior de Agricultura "Luiz de Queiroz"
publisher.none.fl_str_mv Escola Superior de Agricultura "Luiz de Queiroz"
dc.source.none.fl_str_mv Scientia Agricola v.61 n.2 2004
reponame:Scientia Agrícola (Online)
instname:Universidade de São Paulo (USP)
instacron:USP
instname_str Universidade de São Paulo (USP)
instacron_str USP
institution USP
reponame_str Scientia Agrícola (Online)
collection Scientia Agrícola (Online)
repository.name.fl_str_mv Scientia Agrícola (Online) - Universidade de São Paulo (USP)
repository.mail.fl_str_mv scientia@usp.br||alleoni@usp.br
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