Yield, milk quality and physiological variables of dairy cows in rainy and dry seasons
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Semina. Ciências Agrárias (Online) |
Texto Completo: | https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/39583 |
Resumo: | The objective of this study was to analyse the effect of the dry and rainy seasons on the production, milk quality (lactose, fat, protein, total solids, TBC and SCC) and physiological (rectal and surface temperature and respiratory and heart rate) of crossbred cows (holstein/ zebu) in lactation, under rotational grazing regime in cultivated pasture, using 10 crossbred cows (holstein / zebu) in lactation, average live weight of 500 ± 30 kg, and in the rainy season they were between the fourth and fifth months of lactation and in the dry period were between the seventh and eighth months of lactation with an average initial production of 18 ± 4kg of milk / cow / day, maintaining batch homogeneity in both seasons. The animals were kept in a semi-intensive rearing system, using rotational grazing on pasture of Brachiaria decumbens, in an area of 3 hectares, where there was a conglomerate of trees that provided 5m² / animal with natural shade, to shelter the animals in the warm shorelines The seasons and times of the day significantly influenced (P < 0.05) the ambient temperature, relative air humidity and the black globe temperature index and humidity. The respiratory rate and surface temperature were higher (P < 0.05) in the dry season and the values for rectal temperature and respiratory rate were similar (P > 0.05) in the seasons. Milk production and protein showed a significant difference (P < 0.05) depending on the seasons. With the aid of physiological variables (rectal and surface temperature and heart and respiratory rate), even so, cows decreased their production and increased the concentration of protein in milk. |
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Semina. Ciências Agrárias (Online) |
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Yield, milk quality and physiological variables of dairy cows in rainy and dry seasonsProdução, qualidade do leite e variáveis fisiológicos de vacas leiteiras em pastejo rotacionado na estação seca e chuvosaBrachiaria decumbensMilk proteinSomatic cell countTotal bacterial count.Brachiaria decumbensContagem de células somáticasContagem bacteriana totalProteína do leite.The objective of this study was to analyse the effect of the dry and rainy seasons on the production, milk quality (lactose, fat, protein, total solids, TBC and SCC) and physiological (rectal and surface temperature and respiratory and heart rate) of crossbred cows (holstein/ zebu) in lactation, under rotational grazing regime in cultivated pasture, using 10 crossbred cows (holstein / zebu) in lactation, average live weight of 500 ± 30 kg, and in the rainy season they were between the fourth and fifth months of lactation and in the dry period were between the seventh and eighth months of lactation with an average initial production of 18 ± 4kg of milk / cow / day, maintaining batch homogeneity in both seasons. The animals were kept in a semi-intensive rearing system, using rotational grazing on pasture of Brachiaria decumbens, in an area of 3 hectares, where there was a conglomerate of trees that provided 5m² / animal with natural shade, to shelter the animals in the warm shorelines The seasons and times of the day significantly influenced (P < 0.05) the ambient temperature, relative air humidity and the black globe temperature index and humidity. The respiratory rate and surface temperature were higher (P < 0.05) in the dry season and the values for rectal temperature and respiratory rate were similar (P > 0.05) in the seasons. Milk production and protein showed a significant difference (P < 0.05) depending on the seasons. With the aid of physiological variables (rectal and surface temperature and heart and respiratory rate), even so, cows decreased their production and increased the concentration of protein in milk.O objetivo com esta pesquisa foi analisar o efeito das estações seca e chuvosa sobre a produção, qualidade do leite (gordura, lactose, proteína, sólidos totais, CTB e CCS) e as variáveis fisiológicas (temperatura retal e superficial e frequência respiratória e cardíaca) de vacas mestiças (holandês/zebu) em lactação, sob regime de pastejo rotacionado em pastagem cultivada, utilizando-se 10 vacas mestiças (holandês/zebu) em lactação, peso vivo médio de 500 ± 30 kg, sendo que no período chuvoso estavam entre o quarto e quinto mês de lactação e no período seco estavam entre o sétimo e oitavo mês de lactação com uma produção média inicial de 18 ± 4kg de leite/vaca/dia, mantendo homogeneidade do lote nas duas estações. Os animais foram mantidos em sistema semi-intensivo de criação, utilizando pastejo rotacionado em pastagem de Brachiaria decumbens, numa área de 3 hectares, onde existia um conglomerado de árvores que propiciavam 5m²/animal de sombra natural, para abrigar os animais nos horários mais quentes do dia. As estações do ano e os horários do dia influenciaram significativamente (P < 0,05) a temperatura do ambiente, umidade relativa do ar e o índice de temperatura de globo negro e umidade. A frequência respiratória e a temperatura superficial foram mais elevadas (P < 0,05) na estação seca e os valores da temperatura retal e frequência respiratória foram similares (P > 0,05) nas estações. A produção e a proteína do leite apresentaram diferença significativa (P < 0,05) em função das estações do ano. Com o auxílio das variáveis fisiológicas (temperatura retal e superficial e frequência cardíaca e respiratória), mesmo assim, as vacas diminuíram sua produção e aumentaram a concentração de proteína no leite.UEL2021-02-24info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/3958310.5433/1679-0359.2021v42n2p769Semina: Ciências Agrárias; Vol. 42 No. 2 (2021); 769-780Semina: Ciências Agrárias; v. 42 n. 2 (2021); 769-7801679-03591676-546Xreponame:Semina. Ciências Agrárias (Online)instname:Universidade Estadual de Londrina (UEL)instacron:UELenghttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/39583/29061Copyright (c) 2021 Semina: Ciências Agráriashttp://creativecommons.org/licenses/by-nc/4.0info:eu-repo/semantics/openAccessCardoso, Evaldo de AlmeidaFurtado, Dermeval AraújoRibeiro, Neila LidianyMedeiros, Ariosvaldo Nunes deNascimento, George Vieira doGonzaga Neto, SeverinoNascimento, José Wallace Barbosa doBezerra, Rogério Aleson Dias2022-10-04T14:16:49Zoai:ojs.pkp.sfu.ca:article/39583Revistahttp://www.uel.br/revistas/uel/index.php/semagrariasPUBhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/oaisemina.agrarias@uel.br1679-03591676-546Xopendoar:2022-10-04T14:16:49Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)false |
dc.title.none.fl_str_mv |
Yield, milk quality and physiological variables of dairy cows in rainy and dry seasons Produção, qualidade do leite e variáveis fisiológicos de vacas leiteiras em pastejo rotacionado na estação seca e chuvosa |
title |
Yield, milk quality and physiological variables of dairy cows in rainy and dry seasons |
spellingShingle |
Yield, milk quality and physiological variables of dairy cows in rainy and dry seasons Cardoso, Evaldo de Almeida Brachiaria decumbens Milk protein Somatic cell count Total bacterial count. Brachiaria decumbens Contagem de células somáticas Contagem bacteriana total Proteína do leite. |
title_short |
Yield, milk quality and physiological variables of dairy cows in rainy and dry seasons |
title_full |
Yield, milk quality and physiological variables of dairy cows in rainy and dry seasons |
title_fullStr |
Yield, milk quality and physiological variables of dairy cows in rainy and dry seasons |
title_full_unstemmed |
Yield, milk quality and physiological variables of dairy cows in rainy and dry seasons |
title_sort |
Yield, milk quality and physiological variables of dairy cows in rainy and dry seasons |
author |
Cardoso, Evaldo de Almeida |
author_facet |
Cardoso, Evaldo de Almeida Furtado, Dermeval Araújo Ribeiro, Neila Lidiany Medeiros, Ariosvaldo Nunes de Nascimento, George Vieira do Gonzaga Neto, Severino Nascimento, José Wallace Barbosa do Bezerra, Rogério Aleson Dias |
author_role |
author |
author2 |
Furtado, Dermeval Araújo Ribeiro, Neila Lidiany Medeiros, Ariosvaldo Nunes de Nascimento, George Vieira do Gonzaga Neto, Severino Nascimento, José Wallace Barbosa do Bezerra, Rogério Aleson Dias |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Cardoso, Evaldo de Almeida Furtado, Dermeval Araújo Ribeiro, Neila Lidiany Medeiros, Ariosvaldo Nunes de Nascimento, George Vieira do Gonzaga Neto, Severino Nascimento, José Wallace Barbosa do Bezerra, Rogério Aleson Dias |
dc.subject.por.fl_str_mv |
Brachiaria decumbens Milk protein Somatic cell count Total bacterial count. Brachiaria decumbens Contagem de células somáticas Contagem bacteriana total Proteína do leite. |
topic |
Brachiaria decumbens Milk protein Somatic cell count Total bacterial count. Brachiaria decumbens Contagem de células somáticas Contagem bacteriana total Proteína do leite. |
description |
The objective of this study was to analyse the effect of the dry and rainy seasons on the production, milk quality (lactose, fat, protein, total solids, TBC and SCC) and physiological (rectal and surface temperature and respiratory and heart rate) of crossbred cows (holstein/ zebu) in lactation, under rotational grazing regime in cultivated pasture, using 10 crossbred cows (holstein / zebu) in lactation, average live weight of 500 ± 30 kg, and in the rainy season they were between the fourth and fifth months of lactation and in the dry period were between the seventh and eighth months of lactation with an average initial production of 18 ± 4kg of milk / cow / day, maintaining batch homogeneity in both seasons. The animals were kept in a semi-intensive rearing system, using rotational grazing on pasture of Brachiaria decumbens, in an area of 3 hectares, where there was a conglomerate of trees that provided 5m² / animal with natural shade, to shelter the animals in the warm shorelines The seasons and times of the day significantly influenced (P < 0.05) the ambient temperature, relative air humidity and the black globe temperature index and humidity. The respiratory rate and surface temperature were higher (P < 0.05) in the dry season and the values for rectal temperature and respiratory rate were similar (P > 0.05) in the seasons. Milk production and protein showed a significant difference (P < 0.05) depending on the seasons. With the aid of physiological variables (rectal and surface temperature and heart and respiratory rate), even so, cows decreased their production and increased the concentration of protein in milk. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-02-24 |
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://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/39583 10.5433/1679-0359.2021v42n2p769 |
url |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/39583 |
identifier_str_mv |
10.5433/1679-0359.2021v42n2p769 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/39583/29061 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2021 Semina: Ciências Agrárias http://creativecommons.org/licenses/by-nc/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2021 Semina: Ciências Agrárias http://creativecommons.org/licenses/by-nc/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
UEL |
publisher.none.fl_str_mv |
UEL |
dc.source.none.fl_str_mv |
Semina: Ciências Agrárias; Vol. 42 No. 2 (2021); 769-780 Semina: Ciências Agrárias; v. 42 n. 2 (2021); 769-780 1679-0359 1676-546X reponame:Semina. Ciências Agrárias (Online) instname:Universidade Estadual de Londrina (UEL) instacron:UEL |
instname_str |
Universidade Estadual de Londrina (UEL) |
instacron_str |
UEL |
institution |
UEL |
reponame_str |
Semina. Ciências Agrárias (Online) |
collection |
Semina. Ciências Agrárias (Online) |
repository.name.fl_str_mv |
Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL) |
repository.mail.fl_str_mv |
semina.agrarias@uel.br |
_version_ |
1799306082802204672 |