Critical period of competition between weeds and cowpea
Autor(a) principal: | |
---|---|
Data de Publicação: | 1991 |
Outros Autores: | , , |
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/3398 |
Resumo: | The following treatments were included in two experiments carried out at Viçosa, state of Minas Gerais, Brazil: cowpeas in competition with weeds during 12, 24, 36, 48, and 60 days after crop emergence, followed by weed elimination; the same periods in the inverse sequence, i.e., no competition followed by free development of the weeds; plus one treatment always free of weeds, and one always in competition. In the last treatment weed density was about 800 plants per m2, including 17 species (in the first experiment) and 16 species (in the second) of both narrow and broad-leaved weeds. The maximum cowpea yield was obtained when the crop was kept free of weeds for a 36-day period after emergence. When weeds were not controlled, yield decreased as much as 70-90%. Competition decreased the cowpea harvest index and increased its plant height and lodging. |
id |
EMBRAPA-4_020da647cdd85632e0acd041fc0220d8 |
---|---|
oai_identifier_str |
oai:ojs.seer.sct.embrapa.br:article/3398 |
network_acronym_str |
EMBRAPA-4 |
network_name_str |
Pesquisa Agropecuária Brasileira (Online) |
repository_id_str |
|
spelling |
Critical period of competition between weeds and cowpeaPeríodo crítico de competição entre plantas daninhas e a cultura do caupiVigna unguiculata; cowpea yield; harvest index; lodgingVigna unguiculata; rendimento cultural; índice de colheita; acamamentoThe following treatments were included in two experiments carried out at Viçosa, state of Minas Gerais, Brazil: cowpeas in competition with weeds during 12, 24, 36, 48, and 60 days after crop emergence, followed by weed elimination; the same periods in the inverse sequence, i.e., no competition followed by free development of the weeds; plus one treatment always free of weeds, and one always in competition. In the last treatment weed density was about 800 plants per m2, including 17 species (in the first experiment) and 16 species (in the second) of both narrow and broad-leaved weeds. The maximum cowpea yield was obtained when the crop was kept free of weeds for a 36-day period after emergence. When weeds were not controlled, yield decreased as much as 70-90%. Competition decreased the cowpea harvest index and increased its plant height and lodging.Dois experimentos foram instalados em Viçosa, MG, em 1984/85 e 1985/86, compreendendo os seguintes tratamentos: manutenção da cultura do caupi (Vigna unguiculata (L.) Walp.) em competição com plantas daninhas durante 12, 24, 36, 48 e 60 dias após a emergência da cultura, eliminando-se em seguida as plantas invasoras; e permanência da cultura livre da competição durante 12, 24, 36, 48 e 60 dias, deixando, em seguida, que as plantas daninhas crescessem livremente. Acrescentaram-se, além disso, mais dois tratamentos: ausência da competição com plantas daninhas durante todo o ciclo do caupi e competição durante todo o ciclo. No último tratamento, a densidade de plantas invasoras atingiu cerca de 800 por m2, representando 17 espécies (no primeiro experimento) e 16 espécies (no segundo), tanto de folhas estreitas como largas. Verificou-se que o período crítico de competição ocorre da emergência do caupi até 36 dias depois. A flora invasora, quando não controlada, pode diminuir o rendimento da cultura de 70 a 90%. A competição diminuiu o índice de colheita e aumentou a altura das plantas de caupi e seu acamamento.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraMatos, Valderez PontesSilva, Roberto Ferreira daVieira, ClibasSilva, José Francisco da1991-05-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/3398Pesquisa Agropecuaria Brasileira; v.26, n.5, maio 1991; 737-743Pesquisa Agropecuária Brasileira; v.26, n.5, maio 1991; 737-7431678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/3398/731info:eu-repo/semantics/openAccess2010-02-10T11:12:54Zoai:ojs.seer.sct.embrapa.br:article/3398Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2010-02-10T11:12:54Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Critical period of competition between weeds and cowpea Período crítico de competição entre plantas daninhas e a cultura do caupi |
title |
Critical period of competition between weeds and cowpea |
spellingShingle |
Critical period of competition between weeds and cowpea Matos, Valderez Pontes Vigna unguiculata; cowpea yield; harvest index; lodging Vigna unguiculata; rendimento cultural; índice de colheita; acamamento |
title_short |
Critical period of competition between weeds and cowpea |
title_full |
Critical period of competition between weeds and cowpea |
title_fullStr |
Critical period of competition between weeds and cowpea |
title_full_unstemmed |
Critical period of competition between weeds and cowpea |
title_sort |
Critical period of competition between weeds and cowpea |
author |
Matos, Valderez Pontes |
author_facet |
Matos, Valderez Pontes Silva, Roberto Ferreira da Vieira, Clibas Silva, José Francisco da |
author_role |
author |
author2 |
Silva, Roberto Ferreira da Vieira, Clibas Silva, José Francisco da |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Matos, Valderez Pontes Silva, Roberto Ferreira da Vieira, Clibas Silva, José Francisco da |
dc.subject.por.fl_str_mv |
Vigna unguiculata; cowpea yield; harvest index; lodging Vigna unguiculata; rendimento cultural; índice de colheita; acamamento |
topic |
Vigna unguiculata; cowpea yield; harvest index; lodging Vigna unguiculata; rendimento cultural; índice de colheita; acamamento |
description |
The following treatments were included in two experiments carried out at Viçosa, state of Minas Gerais, Brazil: cowpeas in competition with weeds during 12, 24, 36, 48, and 60 days after crop emergence, followed by weed elimination; the same periods in the inverse sequence, i.e., no competition followed by free development of the weeds; plus one treatment always free of weeds, and one always in competition. In the last treatment weed density was about 800 plants per m2, including 17 species (in the first experiment) and 16 species (in the second) of both narrow and broad-leaved weeds. The maximum cowpea yield was obtained when the crop was kept free of weeds for a 36-day period after emergence. When weeds were not controlled, yield decreased as much as 70-90%. Competition decreased the cowpea harvest index and increased its plant height and lodging. |
publishDate |
1991 |
dc.date.none.fl_str_mv |
1991-05-01 |
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/3398 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/3398 |
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/3398/731 |
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.26, n.5, maio 1991; 737-743 Pesquisa Agropecuária Brasileira; v.26, n.5, maio 1991; 737-743 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_ |
1793416691769671680 |