Lactose and milk urea nitrogen: fluctuations during lactation in Holstein cows
Autor(a) principal: | |
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Data de Publicação: | 2014 |
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=S1516-35982014000900479 |
Resumo: | The objective of this study was to evaluate lactose and milk urea nitrogen (MUN) in milk from Holstein cows and their relationship with days in milk (DIM), milk yield, milk fat, milk protein, and somatic cell count (SCC). A total of 1,034 records corresponding to morning and afternoon milkings of 148 Holstein cows were used. Records were taken from 16 herds located in the Northern and Eastern dairy regions of Antioquia (Colombia). The curves were fitted using a generalized additive mixed model with smoothed estimates to find the best smoothing intensity factors involved in MUN and lactose concentration. Regarding MUN, the contemporary group effect was highly significant, but the parity effect was not significant. The DIM, lactose and milk fat smoothed covariates were highly significant, while milk yield and fat and SCC showed no statistical difference. Regarding lactose content, the contemporary group effect was highly significant, while the parity effect was not significant. Days in milk, MUN, milk fat, milk protein, and afternoon-milking SCC smoothed covariates were highly significant, while milk yield and morning-milking SCC were not significant. Lactose and milk urea nitrogen concentrations are affected by various factors throughout lactation, mainly by days in milk. |
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Lactose and milk urea nitrogen: fluctuations during lactation in Holstein cowsdairy cattlegeneralized additive modelmilk metabolitesmilk yieldThe objective of this study was to evaluate lactose and milk urea nitrogen (MUN) in milk from Holstein cows and their relationship with days in milk (DIM), milk yield, milk fat, milk protein, and somatic cell count (SCC). A total of 1,034 records corresponding to morning and afternoon milkings of 148 Holstein cows were used. Records were taken from 16 herds located in the Northern and Eastern dairy regions of Antioquia (Colombia). The curves were fitted using a generalized additive mixed model with smoothed estimates to find the best smoothing intensity factors involved in MUN and lactose concentration. Regarding MUN, the contemporary group effect was highly significant, but the parity effect was not significant. The DIM, lactose and milk fat smoothed covariates were highly significant, while milk yield and fat and SCC showed no statistical difference. Regarding lactose content, the contemporary group effect was highly significant, while the parity effect was not significant. Days in milk, MUN, milk fat, milk protein, and afternoon-milking SCC smoothed covariates were highly significant, while milk yield and morning-milking SCC were not significant. Lactose and milk urea nitrogen concentrations are affected by various factors throughout lactation, mainly by days in milk.Sociedade Brasileira de Zootecnia2014-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000900479Revista Brasileira de Zootecnia v.43 n.9 2014reponame:Revista Brasileira de Zootecnia (Online)instname:Sociedade Brasileira de Zootecnia (SBZ)instacron:SBZ10.1590/S1516-35982014000900004info:eu-repo/semantics/openAccessHenao-Velásquez,Andrés F.Múnera-Bedoya,Oscar DavidHerrera,Ana CristinaAgudelo-Trujillo,Jorge H.Cerón-Muñoz,Mario Fernandoeng2015-09-23T00:00:00Zoai:scielo:S1516-35982014000900479Revistahttps://www.rbz.org.br/pt-br/https://old.scielo.br/oai/scielo-oai.php||bz@sbz.org.br|| secretariarbz@sbz.org.br1806-92901516-3598opendoar:2015-09-23T00:00Revista Brasileira de Zootecnia (Online) - Sociedade Brasileira de Zootecnia (SBZ)false |
dc.title.none.fl_str_mv |
Lactose and milk urea nitrogen: fluctuations during lactation in Holstein cows |
title |
Lactose and milk urea nitrogen: fluctuations during lactation in Holstein cows |
spellingShingle |
Lactose and milk urea nitrogen: fluctuations during lactation in Holstein cows Henao-Velásquez,Andrés F. dairy cattle generalized additive model milk metabolites milk yield |
title_short |
Lactose and milk urea nitrogen: fluctuations during lactation in Holstein cows |
title_full |
Lactose and milk urea nitrogen: fluctuations during lactation in Holstein cows |
title_fullStr |
Lactose and milk urea nitrogen: fluctuations during lactation in Holstein cows |
title_full_unstemmed |
Lactose and milk urea nitrogen: fluctuations during lactation in Holstein cows |
title_sort |
Lactose and milk urea nitrogen: fluctuations during lactation in Holstein cows |
author |
Henao-Velásquez,Andrés F. |
author_facet |
Henao-Velásquez,Andrés F. Múnera-Bedoya,Oscar David Herrera,Ana Cristina Agudelo-Trujillo,Jorge H. Cerón-Muñoz,Mario Fernando |
author_role |
author |
author2 |
Múnera-Bedoya,Oscar David Herrera,Ana Cristina Agudelo-Trujillo,Jorge H. Cerón-Muñoz,Mario Fernando |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Henao-Velásquez,Andrés F. Múnera-Bedoya,Oscar David Herrera,Ana Cristina Agudelo-Trujillo,Jorge H. Cerón-Muñoz,Mario Fernando |
dc.subject.por.fl_str_mv |
dairy cattle generalized additive model milk metabolites milk yield |
topic |
dairy cattle generalized additive model milk metabolites milk yield |
description |
The objective of this study was to evaluate lactose and milk urea nitrogen (MUN) in milk from Holstein cows and their relationship with days in milk (DIM), milk yield, milk fat, milk protein, and somatic cell count (SCC). A total of 1,034 records corresponding to morning and afternoon milkings of 148 Holstein cows were used. Records were taken from 16 herds located in the Northern and Eastern dairy regions of Antioquia (Colombia). The curves were fitted using a generalized additive mixed model with smoothed estimates to find the best smoothing intensity factors involved in MUN and lactose concentration. Regarding MUN, the contemporary group effect was highly significant, but the parity effect was not significant. The DIM, lactose and milk fat smoothed covariates were highly significant, while milk yield and fat and SCC showed no statistical difference. Regarding lactose content, the contemporary group effect was highly significant, while the parity effect was not significant. Days in milk, MUN, milk fat, milk protein, and afternoon-milking SCC smoothed covariates were highly significant, while milk yield and morning-milking SCC were not significant. Lactose and milk urea nitrogen concentrations are affected by various factors throughout lactation, mainly by days in milk. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-09-01 |
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=S1516-35982014000900479 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000900479 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1516-35982014000900004 |
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.43 n.9 2014 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 |
_version_ |
1750318151336198144 |