Fixed versus variable rest period effects on herbage accumulation and canopy structure of grazed 'Tifton 85' and 'Jiggs' Bermuda grass
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , |
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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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) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Pesquisa Agropecuária Brasileira (Online) |
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 |
_version_ |
1793416690090901504 |