Effect of nitrogen fertilization on structure and tillering dynamics of Piata palisade grass during the deferment period
Autor(a) principal: | |
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Data de Publicação: | 2019 |
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/27383 |
Resumo: | Nitrogen fertilization can increase the appearance of new tillers, which can improve the structure of deferred sward, since the deferral period is not long. Thus, the objective of this study was to estimate the effects of nitrogen fertilization on structure and tillering dynamics of Piata palisade grass (Brachiaria brizantha cv. Piata) during deferment. We evaluated three nitrogen fertilization levels (none - 0 kg ha -1; medium - 75 kg ha -1; and high - 150 kg ha -1) associated with deferment periods (1, 30, 60, 90, and 120 days). The experimental design was set in completely randomised blocks in a split-plot arrangement, with three replications. The deferment period influenced foliage area index quadratically (p < 0.01) at all fertilization levels. The improvement in nitrogen fertilization levels increased light interception and reduced the foliage angle, but it did not affect tillering dynamics of Piata palisade grass during the deferment period. Appearance and mortality rates, the balance between tiller appearance and mortality and the stability index of the population of aerial and basal tillers of Piata palisade grass were higher at the beginning of the pasture deferment period. Nitrogen fertilization does not stimulate appearance of tillers on deferred Piata palisade grass. Tiller population stability, however, is only high at the beginning of deferment, decreasing after this initial period. |
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Semina. Ciências Agrárias (Online) |
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Effect of nitrogen fertilization on structure and tillering dynamics of Piata palisade grass during the deferment periodEfeito da adubação nitrogenada na estrutura e dinâmica de perfilhamento do capim-piatã durante o período de diferimentoBrachiaria brizanthaFoliage area indexStability indexTiller.Brachiaria brizanthaPerfilhoÍndice de área de folhagemÍndice de estabilidade.Nitrogen fertilization can increase the appearance of new tillers, which can improve the structure of deferred sward, since the deferral period is not long. Thus, the objective of this study was to estimate the effects of nitrogen fertilization on structure and tillering dynamics of Piata palisade grass (Brachiaria brizantha cv. Piata) during deferment. We evaluated three nitrogen fertilization levels (none - 0 kg ha -1; medium - 75 kg ha -1; and high - 150 kg ha -1) associated with deferment periods (1, 30, 60, 90, and 120 days). The experimental design was set in completely randomised blocks in a split-plot arrangement, with three replications. The deferment period influenced foliage area index quadratically (p < 0.01) at all fertilization levels. The improvement in nitrogen fertilization levels increased light interception and reduced the foliage angle, but it did not affect tillering dynamics of Piata palisade grass during the deferment period. Appearance and mortality rates, the balance between tiller appearance and mortality and the stability index of the population of aerial and basal tillers of Piata palisade grass were higher at the beginning of the pasture deferment period. Nitrogen fertilization does not stimulate appearance of tillers on deferred Piata palisade grass. Tiller population stability, however, is only high at the beginning of deferment, decreasing after this initial period.A adubação nitrogenada pode aumentar o aparecimento de novos perfilhos, o que pode melhorar a estrutura do dossel forrageiro diferido, desde que o período de diferimento não seja longo. Dessa forma, objetivou-se estimar os efeitos da adubação nitrogenada na estrutura e dinâmica de perfilhamento do capim-piatã durante o diferimento. Foram avaliadas condições de adubação nitrogenada (ausente – 0 kg ha -1, média - 75 kg ha -1 e alta - 150 kg ha -1) associadas aos períodos de diferimento (1, 30, 60, 90 e 120 dias). O delineamento experimental foi o de blocos completos casualizados, em esquema de parcelas subdivididas, com três repetições. O período de diferimento influenciou o índice de área da folhagem de forma quadrática (p < 0,01) em todas as condições de adubação. A melhoria da condição de adubação nitrogenada aumentou a interceptação de luz e reduziu o ângulo da folhagem, porém não influenciou a dinâmica do perfilhamento durante o período de diferimento do capim-piatã. As taxas de aparecimento e de mortalidade, o balanço entre o aparecimento e mortalidade de perfilhos, e o índice de estabilidade da população de perfilhos aéreos e basais do capim-piatã foram maiores no início do período de diferimento dos pastos. A adubação nitrogenada não estimula o aparecimento de perfilhos do capim-piatã diferido. Já a estabilidade da população de perfilhos é alta apenas no início do período de diferimento, não se mantendo após esse período inicial.UEL2019-02-15info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/2738310.5433/1679-0359.2019v40n1p249Semina: Ciências Agrárias; Vol. 40 No. 1 (2019); 249-258Semina: Ciências Agrárias; v. 40 n. 1 (2019); 249-2581679-03591676-546Xreponame:Semina. Ciências Agrárias (Online)instname:Universidade Estadual de Londrina (UEL)instacron:UELenghttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/27383/25000Copyright (c) 2019 Semina: Ciências Agráriashttp://creativecommons.org/licenses/by-nc/4.0info:eu-repo/semantics/openAccessSousa, Braulio Maia de LanaSantos, Manoel Eduardo RozalinoAmorim, Philipe Lima deSilveira, Márcia Cristina Teixeira daRocha, Gabriel de OliveiraCarvalho, Angélica Nunes de2022-10-19T15:20:06Zoai:ojs.pkp.sfu.ca:article/27383Revistahttp://www.uel.br/revistas/uel/index.php/semagrariasPUBhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/oaisemina.agrarias@uel.br1679-03591676-546Xopendoar:2022-10-19T15:20:06Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)false |
dc.title.none.fl_str_mv |
Effect of nitrogen fertilization on structure and tillering dynamics of Piata palisade grass during the deferment period Efeito da adubação nitrogenada na estrutura e dinâmica de perfilhamento do capim-piatã durante o período de diferimento |
title |
Effect of nitrogen fertilization on structure and tillering dynamics of Piata palisade grass during the deferment period |
spellingShingle |
Effect of nitrogen fertilization on structure and tillering dynamics of Piata palisade grass during the deferment period Sousa, Braulio Maia de Lana Brachiaria brizantha Foliage area index Stability index Tiller. Brachiaria brizantha Perfilho Índice de área de folhagem Índice de estabilidade. |
title_short |
Effect of nitrogen fertilization on structure and tillering dynamics of Piata palisade grass during the deferment period |
title_full |
Effect of nitrogen fertilization on structure and tillering dynamics of Piata palisade grass during the deferment period |
title_fullStr |
Effect of nitrogen fertilization on structure and tillering dynamics of Piata palisade grass during the deferment period |
title_full_unstemmed |
Effect of nitrogen fertilization on structure and tillering dynamics of Piata palisade grass during the deferment period |
title_sort |
Effect of nitrogen fertilization on structure and tillering dynamics of Piata palisade grass during the deferment period |
author |
Sousa, Braulio Maia de Lana |
author_facet |
Sousa, Braulio Maia de Lana Santos, Manoel Eduardo Rozalino Amorim, Philipe Lima de Silveira, Márcia Cristina Teixeira da Rocha, Gabriel de Oliveira Carvalho, Angélica Nunes de |
author_role |
author |
author2 |
Santos, Manoel Eduardo Rozalino Amorim, Philipe Lima de Silveira, Márcia Cristina Teixeira da Rocha, Gabriel de Oliveira Carvalho, Angélica Nunes de |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Sousa, Braulio Maia de Lana Santos, Manoel Eduardo Rozalino Amorim, Philipe Lima de Silveira, Márcia Cristina Teixeira da Rocha, Gabriel de Oliveira Carvalho, Angélica Nunes de |
dc.subject.por.fl_str_mv |
Brachiaria brizantha Foliage area index Stability index Tiller. Brachiaria brizantha Perfilho Índice de área de folhagem Índice de estabilidade. |
topic |
Brachiaria brizantha Foliage area index Stability index Tiller. Brachiaria brizantha Perfilho Índice de área de folhagem Índice de estabilidade. |
description |
Nitrogen fertilization can increase the appearance of new tillers, which can improve the structure of deferred sward, since the deferral period is not long. Thus, the objective of this study was to estimate the effects of nitrogen fertilization on structure and tillering dynamics of Piata palisade grass (Brachiaria brizantha cv. Piata) during deferment. We evaluated three nitrogen fertilization levels (none - 0 kg ha -1; medium - 75 kg ha -1; and high - 150 kg ha -1) associated with deferment periods (1, 30, 60, 90, and 120 days). The experimental design was set in completely randomised blocks in a split-plot arrangement, with three replications. The deferment period influenced foliage area index quadratically (p < 0.01) at all fertilization levels. The improvement in nitrogen fertilization levels increased light interception and reduced the foliage angle, but it did not affect tillering dynamics of Piata palisade grass during the deferment period. Appearance and mortality rates, the balance between tiller appearance and mortality and the stability index of the population of aerial and basal tillers of Piata palisade grass were higher at the beginning of the pasture deferment period. Nitrogen fertilization does not stimulate appearance of tillers on deferred Piata palisade grass. Tiller population stability, however, is only high at the beginning of deferment, decreasing after this initial period. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-02-15 |
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/27383 10.5433/1679-0359.2019v40n1p249 |
url |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/27383 |
identifier_str_mv |
10.5433/1679-0359.2019v40n1p249 |
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/27383/25000 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2019 Semina: Ciências Agrárias http://creativecommons.org/licenses/by-nc/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2019 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. 40 No. 1 (2019); 249-258 Semina: Ciências Agrárias; v. 40 n. 1 (2019); 249-258 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_ |
1750315425584906240 |