Morphogenic and structural traits of Brachiaria brizantha cv. Marandu submitted to different levels of Nitrogen and frequency harvest

Detalhes bibliográficos
Autor(a) principal: Alexandrino, Emerson
Data de Publicação: 2008
Outros Autores: Nascimento Júnior, Domício do, Regazzi, Adair José, Mosquim, Paulo Roberto, Rocha, Fernanda Cipriano, Souza, Daniel de Paula
Tipo de documento: Artigo
Idioma: por
Título da fonte: Acta Scientiarum. Agronomy (Online)
Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1902
Resumo: Leaf appearance rate (LAR), leaf elongation rate (LER), average leaf size (ALS) and tillers density (TD) of Brachiaria brizantha cv. Marandu, submitted to different levels of nitrogen – (N) (0, 45, 90, 180 e 360 mg dm-3) and frequency harvest (F1 = cuts every 14 days and F2 = cuts in every 28 days) were evaluated, in a randomized block experiment, disposed in pots in a greenhouse. There was no significant effect of the interaction between frequency harvest and the levels of N on LAR. However, it was increased according to the increase of the frequency harvest and to the nitrogen levels. The effect of nitrogen levels was significant on LAR. Only the effect of the interaction between the frequency harvest and the levels of nitrogen on ALS and TD was not significant, being the effect of the frequency harvest negative and the effect of the nitrogen levels positive on ALS. Defoliation in every two weeks was extremely stressor debilitating the plants, which was eased with high supply of nitrogen.
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spelling Morphogenic and structural traits of Brachiaria brizantha cv. Marandu submitted to different levels of Nitrogen and frequency harvestCaracterísticas morfogênicas e estruturais da Brachiaria brizantha cv. Marandu submetida a diferentes doses de nitrogênio e freqüências de cortes - DOI: 10.4025/actasciagron.v27i1.1902desfolhaçãomorfogênesenitrogênioperfilhos5.01.00.00-9 AgronomiaLeaf appearance rate (LAR), leaf elongation rate (LER), average leaf size (ALS) and tillers density (TD) of Brachiaria brizantha cv. Marandu, submitted to different levels of nitrogen – (N) (0, 45, 90, 180 e 360 mg dm-3) and frequency harvest (F1 = cuts every 14 days and F2 = cuts in every 28 days) were evaluated, in a randomized block experiment, disposed in pots in a greenhouse. There was no significant effect of the interaction between frequency harvest and the levels of N on LAR. However, it was increased according to the increase of the frequency harvest and to the nitrogen levels. The effect of nitrogen levels was significant on LAR. Only the effect of the interaction between the frequency harvest and the levels of nitrogen on ALS and TD was not significant, being the effect of the frequency harvest negative and the effect of the nitrogen levels positive on ALS. Defoliation in every two weeks was extremely stressor debilitating the plants, which was eased with high supply of nitrogen.A taxa de aparecimento foliar (TapF), taxa de alongamento foliar (TAlF), taxa de senescência foliar (TSF), tamanho médio de folhas (TMF) e Densidade de Perfilhos (DP) da Brachiaria brizantha cv. Marandu submetida a diferentes doses de nitrogênio – (N) (0, 45, 90, 180 e 360 mg dm-3) e duas freqüências de corte (F1 = cortes a cada 14 dias e F2 = cortes cada 28 dias) foram avaliadas em experimento disposto no delineamento em blocos casualizados, em vasos, em casa-de-vegetação. Não foi encontrada interação significativa entre a freqüência de corte e doses de N para a TApF (P > 0,01). Contudo, ela foi incrementada (P < 0,01) com o aumento da freqüência de corte e com o incremento das doses de N. Houve efeito das doses de N (P < 0,01) sobre a TAlF. Apenas o efeito da interação entre a freqüência de corte e as doses de N sobre o TMF e a DP não foi significativo (P > 0,01), sendo os cortes freqüentes negativo (P < 0,01) e o incremento das doses de N positivo (P < 0,01) sobre o TMF. Desfolhações a cada duas semanas foram extremamente estressantes para as plantas, debilitando-as, isto foi amenizado pelo elevado suprimento de N.Universidade Estadual de Maringá2008-04-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/190210.4025/actasciagron.v27i1.1902Acta Scientiarum. Agronomy; Vol 27 No 1 (2005); 17-24Acta Scientiarum. Agronomy; v. 27 n. 1 (2005); 17-241807-86211679-9275reponame:Acta Scientiarum. Agronomy (Online)instname:Universidade Estadual de Maringá (UEM)instacron:UEMporhttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1902/1227Alexandrino, EmersonNascimento Júnior, Domício doRegazzi, Adair JoséMosquim, Paulo RobertoRocha, Fernanda CiprianoSouza, Daniel de Paulainfo:eu-repo/semantics/openAccess2022-11-23T18:37:37Zoai:periodicos.uem.br/ojs:article/1902Revistahttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgronPUBhttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/oaiactaagron@uem.br||actaagron@uem.br|| edamasio@uem.br1807-86211679-9275opendoar:2022-11-23T18:37:37Acta Scientiarum. Agronomy (Online) - Universidade Estadual de Maringá (UEM)false
dc.title.none.fl_str_mv Morphogenic and structural traits of Brachiaria brizantha cv. Marandu submitted to different levels of Nitrogen and frequency harvest
Características morfogênicas e estruturais da Brachiaria brizantha cv. Marandu submetida a diferentes doses de nitrogênio e freqüências de cortes - DOI: 10.4025/actasciagron.v27i1.1902
title Morphogenic and structural traits of Brachiaria brizantha cv. Marandu submitted to different levels of Nitrogen and frequency harvest
spellingShingle Morphogenic and structural traits of Brachiaria brizantha cv. Marandu submitted to different levels of Nitrogen and frequency harvest
Alexandrino, Emerson
desfolhação
morfogênese
nitrogênio
perfilhos
5.01.00.00-9 Agronomia
title_short Morphogenic and structural traits of Brachiaria brizantha cv. Marandu submitted to different levels of Nitrogen and frequency harvest
title_full Morphogenic and structural traits of Brachiaria brizantha cv. Marandu submitted to different levels of Nitrogen and frequency harvest
title_fullStr Morphogenic and structural traits of Brachiaria brizantha cv. Marandu submitted to different levels of Nitrogen and frequency harvest
title_full_unstemmed Morphogenic and structural traits of Brachiaria brizantha cv. Marandu submitted to different levels of Nitrogen and frequency harvest
title_sort Morphogenic and structural traits of Brachiaria brizantha cv. Marandu submitted to different levels of Nitrogen and frequency harvest
author Alexandrino, Emerson
author_facet Alexandrino, Emerson
Nascimento Júnior, Domício do
Regazzi, Adair José
Mosquim, Paulo Roberto
Rocha, Fernanda Cipriano
Souza, Daniel de Paula
author_role author
author2 Nascimento Júnior, Domício do
Regazzi, Adair José
Mosquim, Paulo Roberto
Rocha, Fernanda Cipriano
Souza, Daniel de Paula
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Alexandrino, Emerson
Nascimento Júnior, Domício do
Regazzi, Adair José
Mosquim, Paulo Roberto
Rocha, Fernanda Cipriano
Souza, Daniel de Paula
dc.subject.por.fl_str_mv desfolhação
morfogênese
nitrogênio
perfilhos
5.01.00.00-9 Agronomia
topic desfolhação
morfogênese
nitrogênio
perfilhos
5.01.00.00-9 Agronomia
description Leaf appearance rate (LAR), leaf elongation rate (LER), average leaf size (ALS) and tillers density (TD) of Brachiaria brizantha cv. Marandu, submitted to different levels of nitrogen – (N) (0, 45, 90, 180 e 360 mg dm-3) and frequency harvest (F1 = cuts every 14 days and F2 = cuts in every 28 days) were evaluated, in a randomized block experiment, disposed in pots in a greenhouse. There was no significant effect of the interaction between frequency harvest and the levels of N on LAR. However, it was increased according to the increase of the frequency harvest and to the nitrogen levels. The effect of nitrogen levels was significant on LAR. Only the effect of the interaction between the frequency harvest and the levels of nitrogen on ALS and TD was not significant, being the effect of the frequency harvest negative and the effect of the nitrogen levels positive on ALS. Defoliation in every two weeks was extremely stressor debilitating the plants, which was eased with high supply of nitrogen.
publishDate 2008
dc.date.none.fl_str_mv 2008-04-11
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 http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1902
10.4025/actasciagron.v27i1.1902
url http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1902
identifier_str_mv 10.4025/actasciagron.v27i1.1902
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1902/1227
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 Universidade Estadual de Maringá
publisher.none.fl_str_mv Universidade Estadual de Maringá
dc.source.none.fl_str_mv Acta Scientiarum. Agronomy; Vol 27 No 1 (2005); 17-24
Acta Scientiarum. Agronomy; v. 27 n. 1 (2005); 17-24
1807-8621
1679-9275
reponame:Acta Scientiarum. Agronomy (Online)
instname:Universidade Estadual de Maringá (UEM)
instacron:UEM
instname_str Universidade Estadual de Maringá (UEM)
instacron_str UEM
institution UEM
reponame_str Acta Scientiarum. Agronomy (Online)
collection Acta Scientiarum. Agronomy (Online)
repository.name.fl_str_mv Acta Scientiarum. Agronomy (Online) - Universidade Estadual de Maringá (UEM)
repository.mail.fl_str_mv actaagron@uem.br||actaagron@uem.br|| edamasio@uem.br
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