Nitrogen fertilization strategies, morphogenetic and structural features in Brachiaria decumbens deferred for 95 days
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Semina. Ciências Agrárias (Online) |
Texto Completo: | https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/12467 |
Resumo: | The aim this work was to evaluate the morphogenic and structural characteristics of Brachiaria decumbens pastures to determine the most suitable nitrogen fertilization strategies, for pastures deferred for a period of 95 days. Four strategies of fertilization at the beginning and end of the summer (0-0, 100- 0, 50-50, 0-100 kg ha-1 N) were studied, respectively, with four replications. The strategy of 100 kg ha-1 N applied at the end of the summer (0-100), followed the parceling strategy at the beginning and end of the summer (50-50) favored higher rates of leaf appearance and lower values of phyllochron. Greater rate of leaf elongation was observed for 0-100 strategy, resulting in 40% increase compared to pastures that were not fertilized. However, there was no effect of fertilization strategies on stem elongation rate, registering an average of 0.28 cm.dia-1. There was a higher blade:stem ratio for the stratum A (40 cm above the soil) in all treatments, observing higher blade:stem ratio for strategies 0-100 and 50-50, at this stratum. There was no effect for the total number of leaves and final leaf length. However, greater stem lengths were observed in pastures with 0-100 fertilizer strategy, followed by the 50-50 strategy. The strategy of applying 100 kg ha-1 at the end of summer, followed by the strategy of 50 kg ha-1 nitrogen divided at the beginning and end of summer, promote greater influence on the morphogenic and structural traits, in pastures deferred for 95 days. |
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Nitrogen fertilization strategies, morphogenetic and structural features in Brachiaria decumbens deferred for 95 daysEstratégias de adubação nitrogenada, características morfogênicas e estruturais em pastos de Brachiaria decumbens diferidos por 95 diasDeferred grazingMorphogenesisPhyllochronUrea.FilocronoMorfogênesePasto diferidoUréia.5.04.00.00-2 – Zootecnia5.04.04.00-8 - Pastagem e ForragiculturaThe aim this work was to evaluate the morphogenic and structural characteristics of Brachiaria decumbens pastures to determine the most suitable nitrogen fertilization strategies, for pastures deferred for a period of 95 days. Four strategies of fertilization at the beginning and end of the summer (0-0, 100- 0, 50-50, 0-100 kg ha-1 N) were studied, respectively, with four replications. The strategy of 100 kg ha-1 N applied at the end of the summer (0-100), followed the parceling strategy at the beginning and end of the summer (50-50) favored higher rates of leaf appearance and lower values of phyllochron. Greater rate of leaf elongation was observed for 0-100 strategy, resulting in 40% increase compared to pastures that were not fertilized. However, there was no effect of fertilization strategies on stem elongation rate, registering an average of 0.28 cm.dia-1. There was a higher blade:stem ratio for the stratum A (40 cm above the soil) in all treatments, observing higher blade:stem ratio for strategies 0-100 and 50-50, at this stratum. There was no effect for the total number of leaves and final leaf length. However, greater stem lengths were observed in pastures with 0-100 fertilizer strategy, followed by the 50-50 strategy. The strategy of applying 100 kg ha-1 at the end of summer, followed by the strategy of 50 kg ha-1 nitrogen divided at the beginning and end of summer, promote greater influence on the morphogenic and structural traits, in pastures deferred for 95 days.O objetivo deste trabalho foi avaliar as características morfogênicas e estruturais de pastos de Brachiaria decumbens para determinar estratégias de adubação nitrogenada, mais adequadas para o pastejo diferido por um período de 95 dias. Foram estudadas quatro estratégias de adubação no início e no final do verão (0-0, 100-0, 50-50, 0-100 kg.ha-1 de N), respectivamente, com quatro repetições. As estratégias de 100 kg.ha-1 de N, aplicados no final do verão (0-100) seguidas da estratégia de parcelamento no início e final do verão (50-50) favoreceram maiores taxas de aparecimento de folhas, menores valores de filocrono. Maior taxa de alongamento foliar foi encontrada para estratégia 0-100, resultando num aumento de 40% em relação aos pastos que não foram adubados. Entretanto, não houve efeito das estratégias de adubação sobre a taxa de alongamento de colmo, registrando-se média de 0,28 cm.dia-1. As estratégias 0-100 e 50-50 promoveram maior relação lâmina:colmo no estrato vertical A. Não foi verificado efeito em relação ao número de folhas totais e ao comprimento final da folha. No entanto, maiores comprimentos de colmos foram observados nos pastos com estratégia de adubação 0-100, seguida da estratégia 50- 50. A estratégia de aplicação de 100 kg.ha-1 no final do verão, seguida da estratégia de 50 kg.ha-1 de N parcelado no início e final do verão, promovem maior influência sobre as variáveis morfogênicas e estruturais em pastos diferidos por 95 dias.UEL2014-04-28info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionPesquisa científicaapplication/pdfhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/1246710.5433/1679-0359.2014v35n2p987Semina: Ciências Agrárias; Vol. 35 No. 2 (2014); 987-998Semina: Ciências Agrárias; v. 35 n. 2 (2014); 987-9981679-03591676-546Xreponame:Semina. Ciências Agrárias (Online)instname:Universidade Estadual de Londrina (UEL)instacron:UELporhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/12467/pdf_299Teixeira, Fábio AndradePires, Aureliano José VieiraSilva, Fabiano FerreiraFries, Daniela DeitosRezende, Claudia de PaulaCosta, Alexsandro Cotrim Pimentel RibeiroSantos, Thiago CardosoNascimento, Paulo Valter Nunesinfo:eu-repo/semantics/openAccess2015-11-19T18:35:50Zoai:ojs.pkp.sfu.ca:article/12467Revistahttp://www.uel.br/revistas/uel/index.php/semagrariasPUBhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/oaisemina.agrarias@uel.br1679-03591676-546Xopendoar:2015-11-19T18:35:50Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)false |
dc.title.none.fl_str_mv |
Nitrogen fertilization strategies, morphogenetic and structural features in Brachiaria decumbens deferred for 95 days Estratégias de adubação nitrogenada, características morfogênicas e estruturais em pastos de Brachiaria decumbens diferidos por 95 dias |
title |
Nitrogen fertilization strategies, morphogenetic and structural features in Brachiaria decumbens deferred for 95 days |
spellingShingle |
Nitrogen fertilization strategies, morphogenetic and structural features in Brachiaria decumbens deferred for 95 days Teixeira, Fábio Andrade Deferred grazing Morphogenesis Phyllochron Urea. Filocrono Morfogênese Pasto diferido Uréia. 5.04.00.00-2 – Zootecnia 5.04.04.00-8 - Pastagem e Forragicultura |
title_short |
Nitrogen fertilization strategies, morphogenetic and structural features in Brachiaria decumbens deferred for 95 days |
title_full |
Nitrogen fertilization strategies, morphogenetic and structural features in Brachiaria decumbens deferred for 95 days |
title_fullStr |
Nitrogen fertilization strategies, morphogenetic and structural features in Brachiaria decumbens deferred for 95 days |
title_full_unstemmed |
Nitrogen fertilization strategies, morphogenetic and structural features in Brachiaria decumbens deferred for 95 days |
title_sort |
Nitrogen fertilization strategies, morphogenetic and structural features in Brachiaria decumbens deferred for 95 days |
author |
Teixeira, Fábio Andrade |
author_facet |
Teixeira, Fábio Andrade Pires, Aureliano José Vieira Silva, Fabiano Ferreira Fries, Daniela Deitos Rezende, Claudia de Paula Costa, Alexsandro Cotrim Pimentel Ribeiro Santos, Thiago Cardoso Nascimento, Paulo Valter Nunes |
author_role |
author |
author2 |
Pires, Aureliano José Vieira Silva, Fabiano Ferreira Fries, Daniela Deitos Rezende, Claudia de Paula Costa, Alexsandro Cotrim Pimentel Ribeiro Santos, Thiago Cardoso Nascimento, Paulo Valter Nunes |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Teixeira, Fábio Andrade Pires, Aureliano José Vieira Silva, Fabiano Ferreira Fries, Daniela Deitos Rezende, Claudia de Paula Costa, Alexsandro Cotrim Pimentel Ribeiro Santos, Thiago Cardoso Nascimento, Paulo Valter Nunes |
dc.subject.por.fl_str_mv |
Deferred grazing Morphogenesis Phyllochron Urea. Filocrono Morfogênese Pasto diferido Uréia. 5.04.00.00-2 – Zootecnia 5.04.04.00-8 - Pastagem e Forragicultura |
topic |
Deferred grazing Morphogenesis Phyllochron Urea. Filocrono Morfogênese Pasto diferido Uréia. 5.04.00.00-2 – Zootecnia 5.04.04.00-8 - Pastagem e Forragicultura |
description |
The aim this work was to evaluate the morphogenic and structural characteristics of Brachiaria decumbens pastures to determine the most suitable nitrogen fertilization strategies, for pastures deferred for a period of 95 days. Four strategies of fertilization at the beginning and end of the summer (0-0, 100- 0, 50-50, 0-100 kg ha-1 N) were studied, respectively, with four replications. The strategy of 100 kg ha-1 N applied at the end of the summer (0-100), followed the parceling strategy at the beginning and end of the summer (50-50) favored higher rates of leaf appearance and lower values of phyllochron. Greater rate of leaf elongation was observed for 0-100 strategy, resulting in 40% increase compared to pastures that were not fertilized. However, there was no effect of fertilization strategies on stem elongation rate, registering an average of 0.28 cm.dia-1. There was a higher blade:stem ratio for the stratum A (40 cm above the soil) in all treatments, observing higher blade:stem ratio for strategies 0-100 and 50-50, at this stratum. There was no effect for the total number of leaves and final leaf length. However, greater stem lengths were observed in pastures with 0-100 fertilizer strategy, followed by the 50-50 strategy. The strategy of applying 100 kg ha-1 at the end of summer, followed by the strategy of 50 kg ha-1 nitrogen divided at the beginning and end of summer, promote greater influence on the morphogenic and structural traits, in pastures deferred for 95 days. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-04-28 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Pesquisa científica |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/12467 10.5433/1679-0359.2014v35n2p987 |
url |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/12467 |
identifier_str_mv |
10.5433/1679-0359.2014v35n2p987 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/12467/pdf_299 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
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. 35 No. 2 (2014); 987-998 Semina: Ciências Agrárias; v. 35 n. 2 (2014); 987-998 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_ |
1799306067401768960 |