Fixed versus variable rest period effects on herbage accumulation and canopy structure of grazed 'Tifton 85' and 'Jiggs' Bermuda grass

Detalhes bibliográficos
Autor(a) principal: Pedreira, Carlos Guilherme Silveira
Data de Publicação: 2018
Outros Autores: Silva, Valdson José da, Guimarães, Murilo Saraiva, Pequeno, Diego Noleto Luz, Tonato, Felipe
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/25202
Resumo: The objective of this work was to evaluate the effects of variable and fixed rest periods on the forage production, plant-part composition, and canopy structural characteristics of 'Tifton 85' and 'Jiggs' Bermuda grass (Cynodon spp.) pastures under rotational stocking. The treatments were two grass cultivars (Jiggs and Tifton 85) and two rest periods (grazing starting whenever the canopy reached 25 cm or every 28 days, regardless of canopy height). A completely randomized experimental design, with a 2×2 factorial arrangement (two grass cultivars and two managements), was used with three replicates. The experiment was carried out during the summer growing season in Piracicaba, SP, Brazil. Pre- and post-grazing forage mass chacteristics were evaluated. 'Jiggs' and 'Tifton 85' canopies had similar light interception (96.8%) at pre-grazing, for fixed and variable rest periods; however, they showed different canopy structural characteristics. 'Jiggs' had greater stem proportion, greater canopy height during pre-grazing, and lower leaf area index. There were no differences between strategies and between grass cultivars for total yield, which averaged 16.8 Mg DM ha-1. Fixed and variable rest periods can be used for 'Tifton 85' and 'Jiggs' Bermuda grass.
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spelling Fixed versus variable rest period effects on herbage accumulation and canopy structure of grazed 'Tifton 85' and 'Jiggs' Bermuda grassEfeitos de períodos de descanso fixo e variável no acúmulo de forragem e estrutura do dossel de capim-bermuda 'Jiggs' e 'Tifton 85' sob pastejoCynodon; canopy height; grazing frequency; light interception; pasture management; regrowthCynodon; altura do dossel; frequência de pastejo; interceptação de luz; manejo da pastagem; rebrotaçãoThe objective of this work was to evaluate the effects of variable and fixed rest periods on the forage production, plant-part composition, and canopy structural characteristics of 'Tifton 85' and 'Jiggs' Bermuda grass (Cynodon spp.) pastures under rotational stocking. The treatments were two grass cultivars (Jiggs and Tifton 85) and two rest periods (grazing starting whenever the canopy reached 25 cm or every 28 days, regardless of canopy height). A completely randomized experimental design, with a 2×2 factorial arrangement (two grass cultivars and two managements), was used with three replicates. The experiment was carried out during the summer growing season in Piracicaba, SP, Brazil. Pre- and post-grazing forage mass chacteristics were evaluated. 'Jiggs' and 'Tifton 85' canopies had similar light interception (96.8%) at pre-grazing, for fixed and variable rest periods; however, they showed different canopy structural characteristics. 'Jiggs' had greater stem proportion, greater canopy height during pre-grazing, and lower leaf area index. There were no differences between strategies and between grass cultivars for total yield, which averaged 16.8 Mg DM ha-1. Fixed and variable rest periods can be used for 'Tifton 85' and 'Jiggs' Bermuda grass.O objetivo deste trabalho foi avaliar os efeitos do uso de períodos de descanso fixo e variável sobre a produção de forragem, a composição morfológica e as características estruturais de dosséis dos pastos de capim‑bermuda 'Tifton 85' e 'Jiggs' (Cynodon spp.), sob lotação rotacionada. Os tratamentos consistiram de duas cultivares de capim (Jiggs e Tifton 85) e dois períodos de descanso (pastejo sempre que o dossel atingisse 25 cm ou a cada 28 dias, independentemente da altura do dossel). Utilizou-se o delineamento inteiramente casualizado, em arranjo fatorial 2x2 (duas cultivares de capim e dois manejos), com três repetições. O experimento foi realizado durante o cultivo de verão, em Piracicaba, SP. Avaliaram-se as características de massa de forragem no pré- e no pós-pastejo. Dosséis de 'Jiggs' e 'Tifton 85' apresentaram valor similar de interceptação da radiação incidente (em média, 96,8%) no pré-pastejo, nos períodos de descanso fixo e variável; no entanto, apresentaram diferenças quanto às características estruturais do dossel. 'Jiggs' apresentou maior proporção de colmo, maior altura do dossel no pré-pastejo e menor índice de área foliar. Não houve differenças entre as estratégias de pastejo e entre as cultivares quanto ao acúmulo total de forragem, que obteve produção média de 16.8 Mg ha-1 MS. Os períodos de descanso fixo e variável podem ser utilizados para os capins 'Tifton 85' e 'Jiggs'.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraPedreira, Carlos Guilherme SilveiraSilva, Valdson José daGuimarães, Murilo SaraivaPequeno, Diego Noleto LuzTonato, Felipe2018-02-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/25202Pesquisa Agropecuaria Brasileira; v.53, n.1, jan. 2018; 113-120Pesquisa Agropecuária Brasileira; v.53, n.1, jan. 2018; 113-1201678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAenghttps://seer.sct.embrapa.br/index.php/pab/article/view/25202/14111https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/25202/16990Direitos autorais 2018 Pesquisa Agropecuária Brasileirainfo:eu-repo/semantics/openAccess2018-02-22T15:25:46Zoai:ojs.seer.sct.embrapa.br:article/25202Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2018-02-22T15:25:46Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Fixed versus variable rest period effects on herbage accumulation and canopy structure of grazed 'Tifton 85' and 'Jiggs' Bermuda grass
Efeitos de períodos de descanso fixo e variável no acúmulo de forragem e estrutura do dossel de capim-bermuda 'Jiggs' e 'Tifton 85' sob pastejo
title Fixed versus variable rest period effects on herbage accumulation and canopy structure of grazed 'Tifton 85' and 'Jiggs' Bermuda grass
spellingShingle Fixed versus variable rest period effects on herbage accumulation and canopy structure of grazed 'Tifton 85' and 'Jiggs' Bermuda grass
Pedreira, Carlos Guilherme Silveira
Cynodon; canopy height; grazing frequency; light interception; pasture management; regrowth
Cynodon; altura do dossel; frequência de pastejo; interceptação de luz; manejo da pastagem; rebrotação
title_short Fixed versus variable rest period effects on herbage accumulation and canopy structure of grazed 'Tifton 85' and 'Jiggs' Bermuda grass
title_full Fixed versus variable rest period effects on herbage accumulation and canopy structure of grazed 'Tifton 85' and 'Jiggs' Bermuda grass
title_fullStr Fixed versus variable rest period effects on herbage accumulation and canopy structure of grazed 'Tifton 85' and 'Jiggs' Bermuda grass
title_full_unstemmed Fixed versus variable rest period effects on herbage accumulation and canopy structure of grazed 'Tifton 85' and 'Jiggs' Bermuda grass
title_sort Fixed versus variable rest period effects on herbage accumulation and canopy structure of grazed 'Tifton 85' and 'Jiggs' Bermuda grass
author Pedreira, Carlos Guilherme Silveira
author_facet Pedreira, Carlos Guilherme Silveira
Silva, Valdson José da
Guimarães, Murilo Saraiva
Pequeno, Diego Noleto Luz
Tonato, Felipe
author_role author
author2 Silva, Valdson José da
Guimarães, Murilo Saraiva
Pequeno, Diego Noleto Luz
Tonato, Felipe
author2_role author
author
author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Pedreira, Carlos Guilherme Silveira
Silva, Valdson José da
Guimarães, Murilo Saraiva
Pequeno, Diego Noleto Luz
Tonato, Felipe
dc.subject.por.fl_str_mv Cynodon; canopy height; grazing frequency; light interception; pasture management; regrowth
Cynodon; altura do dossel; frequência de pastejo; interceptação de luz; manejo da pastagem; rebrotação
topic Cynodon; canopy height; grazing frequency; light interception; pasture management; regrowth
Cynodon; altura do dossel; frequência de pastejo; interceptação de luz; manejo da pastagem; rebrotação
description The objective of this work was to evaluate the effects of variable and fixed rest periods on the forage production, plant-part composition, and canopy structural characteristics of 'Tifton 85' and 'Jiggs' Bermuda grass (Cynodon spp.) pastures under rotational stocking. The treatments were two grass cultivars (Jiggs and Tifton 85) and two rest periods (grazing starting whenever the canopy reached 25 cm or every 28 days, regardless of canopy height). A completely randomized experimental design, with a 2×2 factorial arrangement (two grass cultivars and two managements), was used with three replicates. The experiment was carried out during the summer growing season in Piracicaba, SP, Brazil. Pre- and post-grazing forage mass chacteristics were evaluated. 'Jiggs' and 'Tifton 85' canopies had similar light interception (96.8%) at pre-grazing, for fixed and variable rest periods; however, they showed different canopy structural characteristics. 'Jiggs' had greater stem proportion, greater canopy height during pre-grazing, and lower leaf area index. There were no differences between strategies and between grass cultivars for total yield, which averaged 16.8 Mg DM ha-1. Fixed and variable rest periods can be used for 'Tifton 85' and 'Jiggs' Bermuda grass.
publishDate 2018
dc.date.none.fl_str_mv 2018-02-16
dc.type.none.fl_str_mv
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://seer.sct.embrapa.br/index.php/pab/article/view/25202
url https://seer.sct.embrapa.br/index.php/pab/article/view/25202
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/25202/14111
https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/25202/16990
dc.rights.driver.fl_str_mv Direitos autorais 2018 Pesquisa Agropecuária Brasileira
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Direitos autorais 2018 Pesquisa Agropecuária Brasileira
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
dc.source.none.fl_str_mv Pesquisa Agropecuaria Brasileira; v.53, n.1, jan. 2018; 113-120
Pesquisa Agropecuária Brasileira; v.53, n.1, jan. 2018; 113-120
1678-3921
0100-104x
reponame:Pesquisa Agropecuária Brasileira (Online)
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instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
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institution EMBRAPA
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collection Pesquisa Agropecuária Brasileira (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pab@sct.embrapa.br || sct.pab@embrapa.br
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