Beef heifers grazing behavior and herbage intake in natural grassland under rotational grazing

Detalhes bibliográficos
Autor(a) principal: Barbieri,Cezar Wankura
Data de Publicação: 2015
Outros Autores: Quadros,Fernando Luiz Ferreira de, Jochims,Felipe, Kuinchtner,Bruno Castro, Carvalho,Thiago Henrique Nicola de, Casanova,Pedro Trindade, Fernandes,Augusto Miranda, Pereira,João Bento
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Ciência Rural
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015001102056
Resumo: It was evaluated the effect of two rest intervals between grazing occupations in rotational grazing; 375 and 750 DD (degree-days); based on the cumulative thermal sum necessary for leaf expansion of native grasses of two functional groups over the grazing behavior variables from beef heifers with 12 months old. The experiment was conducted as a completely randomized block design, with two treatments, three replications and measures repeated over time. Grazing behavior was assessed in three occasions (Nov 2011, Jan and Mar 2012), with 24h each. The herbage intake was estimated using an external marker (Cr2O3). The leaf mass was similar among the rest intervals, with a mean of 1261kg DM ha-1. The average grazing time was 627.4min day-1 and bite rate was 37.1 bites min-1. The average number of daily meals was 5.9 with an average of 118.5 minutes. Number of feeding stations visited per minute was 6.1 and the feeding stations permanence time was of 12 seconds. There was a reduction only on grazing time and bite rate over the periods. The range of thermal sums evaluated to define the rest intervals in rotational grazing proved no effect on heifers' grazing behavior and herbage intake
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spelling Beef heifers grazing behavior and herbage intake in natural grassland under rotational grazingbite ratedegree-daygrazing timesward structurethermal-sumIt was evaluated the effect of two rest intervals between grazing occupations in rotational grazing; 375 and 750 DD (degree-days); based on the cumulative thermal sum necessary for leaf expansion of native grasses of two functional groups over the grazing behavior variables from beef heifers with 12 months old. The experiment was conducted as a completely randomized block design, with two treatments, three replications and measures repeated over time. Grazing behavior was assessed in three occasions (Nov 2011, Jan and Mar 2012), with 24h each. The herbage intake was estimated using an external marker (Cr2O3). The leaf mass was similar among the rest intervals, with a mean of 1261kg DM ha-1. The average grazing time was 627.4min day-1 and bite rate was 37.1 bites min-1. The average number of daily meals was 5.9 with an average of 118.5 minutes. Number of feeding stations visited per minute was 6.1 and the feeding stations permanence time was of 12 seconds. There was a reduction only on grazing time and bite rate over the periods. The range of thermal sums evaluated to define the rest intervals in rotational grazing proved no effect on heifers' grazing behavior and herbage intakeUniversidade Federal de Santa Maria2015-11-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015001102056Ciência Rural v.45 n.11 2015reponame:Ciência Ruralinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM10.1590/0103-8478cr20141227info:eu-repo/semantics/openAccessBarbieri,Cezar WankuraQuadros,Fernando Luiz Ferreira deJochims,FelipeKuinchtner,Bruno CastroCarvalho,Thiago Henrique Nicola deCasanova,Pedro TrindadeFernandes,Augusto MirandaPereira,João Bentoeng2015-11-25T00:00:00ZRevista
dc.title.none.fl_str_mv Beef heifers grazing behavior and herbage intake in natural grassland under rotational grazing
title Beef heifers grazing behavior and herbage intake in natural grassland under rotational grazing
spellingShingle Beef heifers grazing behavior and herbage intake in natural grassland under rotational grazing
Barbieri,Cezar Wankura
bite rate
degree-day
grazing time
sward structure
thermal-sum
title_short Beef heifers grazing behavior and herbage intake in natural grassland under rotational grazing
title_full Beef heifers grazing behavior and herbage intake in natural grassland under rotational grazing
title_fullStr Beef heifers grazing behavior and herbage intake in natural grassland under rotational grazing
title_full_unstemmed Beef heifers grazing behavior and herbage intake in natural grassland under rotational grazing
title_sort Beef heifers grazing behavior and herbage intake in natural grassland under rotational grazing
author Barbieri,Cezar Wankura
author_facet Barbieri,Cezar Wankura
Quadros,Fernando Luiz Ferreira de
Jochims,Felipe
Kuinchtner,Bruno Castro
Carvalho,Thiago Henrique Nicola de
Casanova,Pedro Trindade
Fernandes,Augusto Miranda
Pereira,João Bento
author_role author
author2 Quadros,Fernando Luiz Ferreira de
Jochims,Felipe
Kuinchtner,Bruno Castro
Carvalho,Thiago Henrique Nicola de
Casanova,Pedro Trindade
Fernandes,Augusto Miranda
Pereira,João Bento
author2_role author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Barbieri,Cezar Wankura
Quadros,Fernando Luiz Ferreira de
Jochims,Felipe
Kuinchtner,Bruno Castro
Carvalho,Thiago Henrique Nicola de
Casanova,Pedro Trindade
Fernandes,Augusto Miranda
Pereira,João Bento
dc.subject.por.fl_str_mv bite rate
degree-day
grazing time
sward structure
thermal-sum
topic bite rate
degree-day
grazing time
sward structure
thermal-sum
description It was evaluated the effect of two rest intervals between grazing occupations in rotational grazing; 375 and 750 DD (degree-days); based on the cumulative thermal sum necessary for leaf expansion of native grasses of two functional groups over the grazing behavior variables from beef heifers with 12 months old. The experiment was conducted as a completely randomized block design, with two treatments, three replications and measures repeated over time. Grazing behavior was assessed in three occasions (Nov 2011, Jan and Mar 2012), with 24h each. The herbage intake was estimated using an external marker (Cr2O3). The leaf mass was similar among the rest intervals, with a mean of 1261kg DM ha-1. The average grazing time was 627.4min day-1 and bite rate was 37.1 bites min-1. The average number of daily meals was 5.9 with an average of 118.5 minutes. Number of feeding stations visited per minute was 6.1 and the feeding stations permanence time was of 12 seconds. There was a reduction only on grazing time and bite rate over the periods. The range of thermal sums evaluated to define the rest intervals in rotational grazing proved no effect on heifers' grazing behavior and herbage intake
publishDate 2015
dc.date.none.fl_str_mv 2015-11-01
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=S0103-84782015001102056
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015001102056
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/0103-8478cr20141227
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 Universidade Federal de Santa Maria
publisher.none.fl_str_mv Universidade Federal de Santa Maria
dc.source.none.fl_str_mv Ciência Rural v.45 n.11 2015
reponame:Ciência Rural
instname:Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
instname_str Universidade Federal de Santa Maria (UFSM)
instacron_str UFSM
institution UFSM
reponame_str Ciência Rural
collection Ciência Rural
repository.name.fl_str_mv
repository.mail.fl_str_mv
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