Intake, digestibility and nitrogen use efficiency in crossbred F1 Holstein × Zebu grazing cows

Detalhes bibliográficos
Autor(a) principal: Santos,Stefanie Alvarenga
Data de Publicação: 2012
Outros Autores: Valadares Filho,Sebastião de Campos, Detmann,Edenio, Valadares,Rilene Ferreira Diniz, Ruas,José Reinaldo Mendes, Prados,Laura Franco, Amaral,Paloma de Melo, Mariz,Lays Débora Silva
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=S1516-35982012000400027
Resumo: The objective of this study was to evaluate intake, digestibility and nitrogen (N) compounds use efficiency in F1 Holstein × Zebu grazing cows. Eighteen crossbred cows (six Holstein × Gir, six Holstein × Guzerat, and six Holstein × Nellore) were used in the experiment, constituting three experimental treatments in simple random samples, under the same feeding conditions. At the estimation of individual intake at grazing, titanium dioxide was used for estimating fecal excretion and indigestible neutral detergent fiber, in order to determine pasture intake. There was effect of the lactation period on nutrient intake, except for the intakes of dry matter (DM), organic matter (OM) and total digestible nutrients (TDN) in % of body weight (BW), as well as those of non-fibrous carbohydrates (NFC), in kg. The digestibility coefficients of crude protein (CP), neutral detergent fiber corrected for ash and protein (NDFap) and the contents of TDN varied in function of the lactation period, whereas the coefficients of digestibility of DM, ether extract (EE) and OM did not present such effect. The total milk production projected at 305 days of lactation for Holstein × Gir cows was superior in relation to Holstein × Guzerat and Holstein × Nellore cows. The excretion of urea into urine and of urea N into the milk and the plasma presented quadratic behavior in function of the lactation period. The utilization of the genetic group from Holstein × Zebu grazing cows does not cause alterations in intake, nutrient digestibility or nitrogen use efficiency; however, there is variation in function of the lactation period. Holstein × Gir cows presented greater accumulated production during lactation and persistence, followed by Holstein × Guzerat and Holstein × Nellore cows.
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spelling Intake, digestibility and nitrogen use efficiency in crossbred F1 Holstein × Zebu grazing cowsBrachiaria decumbenscrossbreedingmilk productionperformanceThe objective of this study was to evaluate intake, digestibility and nitrogen (N) compounds use efficiency in F1 Holstein × Zebu grazing cows. Eighteen crossbred cows (six Holstein × Gir, six Holstein × Guzerat, and six Holstein × Nellore) were used in the experiment, constituting three experimental treatments in simple random samples, under the same feeding conditions. At the estimation of individual intake at grazing, titanium dioxide was used for estimating fecal excretion and indigestible neutral detergent fiber, in order to determine pasture intake. There was effect of the lactation period on nutrient intake, except for the intakes of dry matter (DM), organic matter (OM) and total digestible nutrients (TDN) in % of body weight (BW), as well as those of non-fibrous carbohydrates (NFC), in kg. The digestibility coefficients of crude protein (CP), neutral detergent fiber corrected for ash and protein (NDFap) and the contents of TDN varied in function of the lactation period, whereas the coefficients of digestibility of DM, ether extract (EE) and OM did not present such effect. The total milk production projected at 305 days of lactation for Holstein × Gir cows was superior in relation to Holstein × Guzerat and Holstein × Nellore cows. The excretion of urea into urine and of urea N into the milk and the plasma presented quadratic behavior in function of the lactation period. The utilization of the genetic group from Holstein × Zebu grazing cows does not cause alterations in intake, nutrient digestibility or nitrogen use efficiency; however, there is variation in function of the lactation period. Holstein × Gir cows presented greater accumulated production during lactation and persistence, followed by Holstein × Guzerat and Holstein × Nellore cows.Sociedade Brasileira de Zootecnia2012-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000400027Revista Brasileira de Zootecnia v.41 n.4 2012reponame:Revista Brasileira de Zootecnia (Online)instname:Sociedade Brasileira de Zootecnia (SBZ)instacron:SBZ10.1590/S1516-35982012000400027info:eu-repo/semantics/openAccessSantos,Stefanie AlvarengaValadares Filho,Sebastião de CamposDetmann,EdenioValadares,Rilene Ferreira DinizRuas,José Reinaldo MendesPrados,Laura FrancoAmaral,Paloma de MeloMariz,Lays Débora Silvaeng2012-05-23T00:00:00Zoai:scielo:S1516-35982012000400027Revistahttps://www.rbz.org.br/pt-br/https://old.scielo.br/oai/scielo-oai.php||bz@sbz.org.br|| secretariarbz@sbz.org.br1806-92901516-3598opendoar:2012-05-23T00:00Revista Brasileira de Zootecnia (Online) - Sociedade Brasileira de Zootecnia (SBZ)false
dc.title.none.fl_str_mv Intake, digestibility and nitrogen use efficiency in crossbred F1 Holstein × Zebu grazing cows
title Intake, digestibility and nitrogen use efficiency in crossbred F1 Holstein × Zebu grazing cows
spellingShingle Intake, digestibility and nitrogen use efficiency in crossbred F1 Holstein × Zebu grazing cows
Santos,Stefanie Alvarenga
Brachiaria decumbens
crossbreeding
milk production
performance
title_short Intake, digestibility and nitrogen use efficiency in crossbred F1 Holstein × Zebu grazing cows
title_full Intake, digestibility and nitrogen use efficiency in crossbred F1 Holstein × Zebu grazing cows
title_fullStr Intake, digestibility and nitrogen use efficiency in crossbred F1 Holstein × Zebu grazing cows
title_full_unstemmed Intake, digestibility and nitrogen use efficiency in crossbred F1 Holstein × Zebu grazing cows
title_sort Intake, digestibility and nitrogen use efficiency in crossbred F1 Holstein × Zebu grazing cows
author Santos,Stefanie Alvarenga
author_facet Santos,Stefanie Alvarenga
Valadares Filho,Sebastião de Campos
Detmann,Edenio
Valadares,Rilene Ferreira Diniz
Ruas,José Reinaldo Mendes
Prados,Laura Franco
Amaral,Paloma de Melo
Mariz,Lays Débora Silva
author_role author
author2 Valadares Filho,Sebastião de Campos
Detmann,Edenio
Valadares,Rilene Ferreira Diniz
Ruas,José Reinaldo Mendes
Prados,Laura Franco
Amaral,Paloma de Melo
Mariz,Lays Débora Silva
author2_role author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Santos,Stefanie Alvarenga
Valadares Filho,Sebastião de Campos
Detmann,Edenio
Valadares,Rilene Ferreira Diniz
Ruas,José Reinaldo Mendes
Prados,Laura Franco
Amaral,Paloma de Melo
Mariz,Lays Débora Silva
dc.subject.por.fl_str_mv Brachiaria decumbens
crossbreeding
milk production
performance
topic Brachiaria decumbens
crossbreeding
milk production
performance
description The objective of this study was to evaluate intake, digestibility and nitrogen (N) compounds use efficiency in F1 Holstein × Zebu grazing cows. Eighteen crossbred cows (six Holstein × Gir, six Holstein × Guzerat, and six Holstein × Nellore) were used in the experiment, constituting three experimental treatments in simple random samples, under the same feeding conditions. At the estimation of individual intake at grazing, titanium dioxide was used for estimating fecal excretion and indigestible neutral detergent fiber, in order to determine pasture intake. There was effect of the lactation period on nutrient intake, except for the intakes of dry matter (DM), organic matter (OM) and total digestible nutrients (TDN) in % of body weight (BW), as well as those of non-fibrous carbohydrates (NFC), in kg. The digestibility coefficients of crude protein (CP), neutral detergent fiber corrected for ash and protein (NDFap) and the contents of TDN varied in function of the lactation period, whereas the coefficients of digestibility of DM, ether extract (EE) and OM did not present such effect. The total milk production projected at 305 days of lactation for Holstein × Gir cows was superior in relation to Holstein × Guzerat and Holstein × Nellore cows. The excretion of urea into urine and of urea N into the milk and the plasma presented quadratic behavior in function of the lactation period. The utilization of the genetic group from Holstein × Zebu grazing cows does not cause alterations in intake, nutrient digestibility or nitrogen use efficiency; however, there is variation in function of the lactation period. Holstein × Gir cows presented greater accumulated production during lactation and persistence, followed by Holstein × Guzerat and Holstein × Nellore cows.
publishDate 2012
dc.date.none.fl_str_mv 2012-04-01
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=S1516-35982012000400027
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000400027
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-35982012000400027
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.41 n.4 2012
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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