Beef heifers grazing behavior and herbage intake in natural grassland under rotational grazing
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...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Universidade Federal de Santa Maria
2015-11-01
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| Series: | Ciência Rural |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015001102056&lng=en&tlng=en |
| _version_ | 1819264036058955776 |
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| author | Cezar Wankura Barbieri Fernando Luiz Ferreira de Quadros Felipe Jochims Bruno Castro Kuinchtner Thiago Henrique Nicola de Carvalho Pedro Trindade Casanova Augusto Miranda Fernandes João Bento Pereira |
| author_facet | Cezar Wankura Barbieri Fernando Luiz Ferreira de Quadros Felipe Jochims Bruno Castro Kuinchtner Thiago Henrique Nicola de Carvalho Pedro Trindade Casanova Augusto Miranda Fernandes João Bento Pereira |
| author_sort | Cezar Wankura Barbieri |
| collection | DOAJ |
| 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 |
| first_indexed | 2024-12-23T20:23:05Z |
| format | Article |
| id | doaj.art-edea1ae1c14f48478a7120e3f477fd28 |
| institution | Directory Open Access Journal |
| issn | 1678-4596 |
| language | English |
| last_indexed | 2024-12-23T20:23:05Z |
| publishDate | 2015-11-01 |
| publisher | Universidade Federal de Santa Maria |
| record_format | Article |
| series | Ciência Rural |
| spelling | doaj.art-edea1ae1c14f48478a7120e3f477fd282022-12-21T17:32:28ZengUniversidade Federal de Santa MariaCiência Rural1678-45962015-11-0145112056206210.1590/0103-8478cr20141227S0103-84782015001102056Beef heifers grazing behavior and herbage intake in natural grassland under rotational grazingCezar Wankura BarbieriFernando Luiz Ferreira de QuadrosFelipe JochimsBruno Castro KuinchtnerThiago Henrique Nicola de CarvalhoPedro Trindade CasanovaAugusto Miranda FernandesJoão Bento PereiraIt 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 intakehttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015001102056&lng=en&tlng=enestrutura da pastagemgraus-diasoma térmicataxa de bocadostempo de pastejo |
| spellingShingle | Cezar Wankura Barbieri Fernando Luiz Ferreira de Quadros Felipe Jochims Bruno Castro Kuinchtner Thiago Henrique Nicola de Carvalho Pedro Trindade Casanova Augusto Miranda Fernandes João Bento Pereira Beef heifers grazing behavior and herbage intake in natural grassland under rotational grazing Ciência Rural estrutura da pastagem graus-dia soma térmica taxa de bocados tempo de pastejo |
| title | 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_short | 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 |
| topic | estrutura da pastagem graus-dia soma térmica taxa de bocados tempo de pastejo |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015001102056&lng=en&tlng=en |
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