Herbicides on nodulation and N2-fixation in cowpea

Detalhes bibliográficos
Autor(a) principal: Carlos C. Silva, José
Data de Publicação: 1998
Outros Autores: Colaço, Waldeciro, de A. Burity, Hélio, C. M. Ferreira, Neydson, V. B. Figueiredo, Márcia, R. Martinez, Cosme
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/4816
Resumo: An experiment was carried out under greenhouse conditions in order to evaluate the effects of soil applications of different herbicides on nodulation and nitrogen fixation in cowpea [Vigna unguiculata (L.) Walp]. Treatments included a control (without herbicide) and application of the herbicides at the recommended rates and at the double of these rates (triflurarin 1.8 and 3.6 L.ha-1; EPTC 5.0 and 10.0 L.ha-1; pendimethalin 2.0 and 4.0 L.ha-1; metribuzin 1.1 and 2.2 L.ha-1; linuron 2.4 and 4.8 L.ha-1; imazaquim 1.0 and 2.0 L.ha-1). All treatments were inoculated with Bradyrhizobium, strain NBF 09. Growth of cowpea was evaluated at 20, 40, 60, and 80 days after planting. The data suggested that cowpea nodulation was affected by trifluralin (1.8 L.ha-1) linuron (2.4 L.ha-1), and imazaquim (1.0 L.ha-1), but the effects occurred only at the earlier stages of cowpea growth. Total nitrogenase activity was reduced in the soil treated with herbicides. Metribuzin and linuron showed a large degree of fitotoxicity to the crop, inhibiting its vegetative growth. Notwithstanding these effects observed on nodulation and nitrogen fixation, the herbicides seem not to have affected nitrogen uptake.
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spelling Herbicides on nodulation and N2-fixation in cowpeaHerbicidas na nodulação e na fixação de N2 em caupiBradyrhizobium; N2-fixation; Vigna unguiculataBradyrhizobium; fixação de N2; Vigna unguiculataAn experiment was carried out under greenhouse conditions in order to evaluate the effects of soil applications of different herbicides on nodulation and nitrogen fixation in cowpea [Vigna unguiculata (L.) Walp]. Treatments included a control (without herbicide) and application of the herbicides at the recommended rates and at the double of these rates (triflurarin 1.8 and 3.6 L.ha-1; EPTC 5.0 and 10.0 L.ha-1; pendimethalin 2.0 and 4.0 L.ha-1; metribuzin 1.1 and 2.2 L.ha-1; linuron 2.4 and 4.8 L.ha-1; imazaquim 1.0 and 2.0 L.ha-1). All treatments were inoculated with Bradyrhizobium, strain NBF 09. Growth of cowpea was evaluated at 20, 40, 60, and 80 days after planting. The data suggested that cowpea nodulation was affected by trifluralin (1.8 L.ha-1) linuron (2.4 L.ha-1), and imazaquim (1.0 L.ha-1), but the effects occurred only at the earlier stages of cowpea growth. Total nitrogenase activity was reduced in the soil treated with herbicides. Metribuzin and linuron showed a large degree of fitotoxicity to the crop, inhibiting its vegetative growth. Notwithstanding these effects observed on nodulation and nitrogen fixation, the herbicides seem not to have affected nitrogen uptake.Objetivando avaliar os efeitos da aplicação de distintos herbicidas na nodulação e na fixação do N2 em caupi [Vigna unguiculata (L.) Walp], foi instalado um experimento em casa de vegetação, utilizando um Latossolo Vermelho-Amarelo, da Zona da Mata Norte de Pernambuco. Os tratamentos incluíram a aplicação de herbicidas em doses correspondentes às recomendadas e ao dobro destas (trifluralin 1,8 e 3,6 L.ha-1; EPTC 5,0 e 10,0 L.ha-1; pendimethalin 2,0 e 4,0 L.ha-1; metribuzin 1,1 e 2,2 L.ha-1; linuron 2,4 e 4,8 L.ha-1; e imazaquim 1,0 e 2,0 L.ha-1), além de um tratamento sem herbicida (controle). Em todos os tratamentos as sementes de caupi (variedade BR-IPA-206) foram infectadas com a estirpe de Bradyrhizobium NFB 09. O desenvolvimento do caupi foi avaliado aos 20, 40, 60 e 80 dias após o plantio. Os resultados mostraram que a nodulação foi afetada na presença dos herbicidas trifluralin (1,8 L.ha-1), linuron (2,4 L.ha-1) e imazaquim (1,0 L.ha-1), mas os efeitos ocorreram apenas nos estádios iniciais do desenvolvimento da variedade de caupi estudada. A atividade total da enzima nitrogenase foi reduzida no solo tratado com herbicidas. O metribuzin e o linuron apresentaram elevado grau de fitotoxicidade para a cultura, inibindo o seu desenvolvimento vegetativo. Apesar dos efeitos observados na nodulação e na fixação do nitrogênio, os herbicidas não afetaram diretamente a acumulação de nitrogênio pelas plantas de caupi.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraCarlos C. Silva, JoséColaço, Waldecirode A. Burity, HélioC. M. Ferreira, NeydsonV. B. Figueiredo, MárciaR. Martinez, Cosme1998-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/4816Pesquisa Agropecuaria Brasileira; v.33, n.1, jan. 1998; 77-86Pesquisa Agropecuária Brasileira; v.33, n.1, jan. 1998; 77-861678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/4816/6935info:eu-repo/semantics/openAccess2014-11-10T18:39:22Zoai:ojs.seer.sct.embrapa.br:article/4816Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-11-10T18:39:22Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Herbicides on nodulation and N2-fixation in cowpea
Herbicidas na nodulação e na fixação de N2 em caupi
title Herbicides on nodulation and N2-fixation in cowpea
spellingShingle Herbicides on nodulation and N2-fixation in cowpea
Carlos C. Silva, José
Bradyrhizobium; N2-fixation; Vigna unguiculata
Bradyrhizobium; fixação de N2; Vigna unguiculata
title_short Herbicides on nodulation and N2-fixation in cowpea
title_full Herbicides on nodulation and N2-fixation in cowpea
title_fullStr Herbicides on nodulation and N2-fixation in cowpea
title_full_unstemmed Herbicides on nodulation and N2-fixation in cowpea
title_sort Herbicides on nodulation and N2-fixation in cowpea
author Carlos C. Silva, José
author_facet Carlos C. Silva, José
Colaço, Waldeciro
de A. Burity, Hélio
C. M. Ferreira, Neydson
V. B. Figueiredo, Márcia
R. Martinez, Cosme
author_role author
author2 Colaço, Waldeciro
de A. Burity, Hélio
C. M. Ferreira, Neydson
V. B. Figueiredo, Márcia
R. Martinez, Cosme
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Carlos C. Silva, José
Colaço, Waldeciro
de A. Burity, Hélio
C. M. Ferreira, Neydson
V. B. Figueiredo, Márcia
R. Martinez, Cosme
dc.subject.por.fl_str_mv Bradyrhizobium; N2-fixation; Vigna unguiculata
Bradyrhizobium; fixação de N2; Vigna unguiculata
topic Bradyrhizobium; N2-fixation; Vigna unguiculata
Bradyrhizobium; fixação de N2; Vigna unguiculata
description An experiment was carried out under greenhouse conditions in order to evaluate the effects of soil applications of different herbicides on nodulation and nitrogen fixation in cowpea [Vigna unguiculata (L.) Walp]. Treatments included a control (without herbicide) and application of the herbicides at the recommended rates and at the double of these rates (triflurarin 1.8 and 3.6 L.ha-1; EPTC 5.0 and 10.0 L.ha-1; pendimethalin 2.0 and 4.0 L.ha-1; metribuzin 1.1 and 2.2 L.ha-1; linuron 2.4 and 4.8 L.ha-1; imazaquim 1.0 and 2.0 L.ha-1). All treatments were inoculated with Bradyrhizobium, strain NBF 09. Growth of cowpea was evaluated at 20, 40, 60, and 80 days after planting. The data suggested that cowpea nodulation was affected by trifluralin (1.8 L.ha-1) linuron (2.4 L.ha-1), and imazaquim (1.0 L.ha-1), but the effects occurred only at the earlier stages of cowpea growth. Total nitrogenase activity was reduced in the soil treated with herbicides. Metribuzin and linuron showed a large degree of fitotoxicity to the crop, inhibiting its vegetative growth. Notwithstanding these effects observed on nodulation and nitrogen fixation, the herbicides seem not to have affected nitrogen uptake.
publishDate 1998
dc.date.none.fl_str_mv 1998-01-01
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/4816
url https://seer.sct.embrapa.br/index.php/pab/article/view/4816
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/4816/6935
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 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.33, n.1, jan. 1998; 77-86
Pesquisa Agropecuária Brasileira; v.33, n.1, jan. 1998; 77-86
1678-3921
0100-104x
reponame:Pesquisa Agropecuária Brasileira (Online)
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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
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