Períodos de interferência das plantas daninhas em algodoeiro de fibra colorida ‘BRS Safira’

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dc.contributor.authorCardoso, Gleibson Dionizio
dc.contributor.authorda Costa Aguiar Alves, Pedro Luis [UNESP]
dc.contributor.authorde Macedo Beltrao, Napoleao Esberard
dc.contributor.authordo Vale, Leandro Silva
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal da Paraíba (UFPB)
dc.date.accessioned2014-05-20T13:13:13Z
dc.date.available2014-05-20T13:13:13Z
dc.date.issued2010-07-01
dc.description.abstractThis study aimed to determine the late-season presence of weeds in reddish brown cotton (cultivar BRS Safira) and the critical times for removing weeds. The experiment was carried out in the area of Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) in Missao Velha-CE, Brazil, located at 7 degrees 42'07" S latitude and 39 degrees 24'18" WGr. longitude, during the 2007/2008 season. The treatments consisted of two control groups: weed-free crop during the initial period after crop emergency, and crop kept with weeds during initial period after plant emergency. Both consisted, 0; 20; 40; 60; 80 e 120 days after crop emergency (DAE), the weed community was evaluated by two phytosociological indices (relative dominance and relative importance). Regression analysis was performed as the model of sigmoidal Boltzman, using data from productivity separately within each type of competition, to identify the critical periods of competition, considering 2; 5 and 10% reduction in yield. The community of weeds was composed by 21 species, standing out among them: Richardia grandiflora, Amaranthus deflexus, Eleusine indica, Merremia aegyptia, Eragrotis pilosa, Cenchrus echinatus and Waltheria indica. Considering 2; 5 and 10% reduction in yield fiber as acceptable, the critical period before weed interference were, respectively, 8; 14 and 20 DAE. The critical period of weed interference, for those same levels of losses, were respectively, 100; 82 and 60 days.en
dc.description.affiliationEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA) Algodao, Campina Grande, PB, Brazil
dc.description.affiliationFCAV UNESP, Dept Biol Aplicada Agr, Jaboticabal, SP, Brazil
dc.description.affiliationPesquisador Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) Algodao, Campina Grande, PB, Brazil
dc.description.affiliationUFPB CCA, Programa Posgrad Agron, Areia, PB, Brazil
dc.description.affiliationUnespFCAV UNESP, Dept Biol Aplicada Agr, Jaboticabal, SP, Brazil
dc.format.extent456-462
dc.identifierhttp://www.ccarevista.ufc.br/seer/index.php/ccarevista/article/view/630
dc.identifier.citationRevista Ciência Agronomica. Fortaleza: Univ Federal Ceara, Dept Geol, v. 41, n. 3, p. 456-462, 2010.
dc.identifier.fileWOS000282248900019.pdf
dc.identifier.issn0045-6888
dc.identifier.urihttp://hdl.handle.net/11449/1078
dc.identifier.wosWOS:000282248900019
dc.language.isopor
dc.publisherUniv Federal Ceara, Dept Geol
dc.relation.ispartofRevista Ciência Agronômica
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectGossypium hirsutum L.en
dc.subjectRace latifoliumen
dc.subjectNaturally colored cottonsen
dc.subjectCompetitionen
dc.titlePeríodos de interferência das plantas daninhas em algodoeiro de fibra colorida ‘BRS Safira’pt
dc.title.alternativeWeeds interference periods in naturally colored cotton 'BRS Safira'en
dc.typeArtigo
dcterms.rightsHolderUniv Federal Ceara, Dept Geol
unesp.author.orcid0000-0003-2348-2121[2]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt

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