Weeds in pastures: a phytosociological approach in Ceara areas
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Agrarian (Dourados. Online) |
Texto Completo: | https://ojs.ufgd.edu.br/index.php/agrarian/article/view/7048 |
Resumo: | The aim of this study was to study the phytosociology of weed species in areas of pasture cultivated with Brachiaria decumbens and Cynodon sp. (Tifton 85), in Ceará State, Brazil. The square inventory methodology was used in order to assess the weed community. Weed samples were quantified and classified by family, genus and species, using books and classification keys. The classification and quantification data of species allowed to calculate the following phytosociological variables: frequency (F), relative frequency (Fr), density (D), relative density (Dr), absolute dominance (DoA), relative dominance (DoR), importance value index (IVI), and similarity index (IS). The Amaranthaceae family was the one with the greatest intensity of species in both areas, represented mainly by Alternanthera tenera colla and Amaranthus viridis. In the area cultivated with B. decumbens, Cyperus rotundus presented higher results for frequency, density and abundance. In the Tifton 85 area, Nicandra physalodes presented higher values of density and abundance. The similarity of weed populations in pasture areas was 42.11%, with four species common to both areas. |
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Weeds in pastures: a phytosociological approach in Ceara areasErvas daninha em pastagens: uma abordagem fitossociológica nas áreas do CearáBrachiaria decumbensfitossociologiaíndice de valor de importânciaBrachiaria decumbensfitossociologiaíndice de valor de importânciaThe aim of this study was to study the phytosociology of weed species in areas of pasture cultivated with Brachiaria decumbens and Cynodon sp. (Tifton 85), in Ceará State, Brazil. The square inventory methodology was used in order to assess the weed community. Weed samples were quantified and classified by family, genus and species, using books and classification keys. The classification and quantification data of species allowed to calculate the following phytosociological variables: frequency (F), relative frequency (Fr), density (D), relative density (Dr), absolute dominance (DoA), relative dominance (DoR), importance value index (IVI), and similarity index (IS). The Amaranthaceae family was the one with the greatest intensity of species in both areas, represented mainly by Alternanthera tenera colla and Amaranthus viridis. In the area cultivated with B. decumbens, Cyperus rotundus presented higher results for frequency, density and abundance. In the Tifton 85 area, Nicandra physalodes presented higher values of density and abundance. The similarity of weed populations in pasture areas was 42.11%, with four species common to both areas.O objetivo deste estudo foi estudar a fitossociologia das espécies de ervas daninhas em áreas de pastagem cultivadas com Brachiaria decumbens e Cynodon sp. (Tifton 85), no estado do Ceará, no Brasil. A metodologia de inventário quadrado foi utilizada para avaliar a comunidade de ervas daninhas. As amostras de ervas daninhas foram quantificadas e classificadas por família, gênero e espécie, usando livros e chaves de classificação. Os dados de classificação e quantificação das espécies permitiram calcular as seguintes variáveis fitossociológicas: frequência (F), frequência relativa (Fr), densidade (D), densidade relativa (DR), dominância absoluta (DoA), dominância relativa (DoR), importância índice de valores (IVI) e índice de similaridade (IS). A família Amaranthaceae foi aquela com maior intensidade de espécies em ambas as áreas, representada principalmente por Alternanthera tenera colla e Amaranthus viridis. Na área cultivada com B. decumbens, Cyperus rotundus apresentou maiores resultados de frequência, densidade e abundância. Na área de Tifton 85, os physalodes de Nicandra apresentaram maiores valores de densidade e abundância. A semelhança das populações de plantas daninhas em áreas de pastagem foi de 42,11%, com quatro espécies comuns a ambas as áreas.Editora UFGD2019-10-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://ojs.ufgd.edu.br/index.php/agrarian/article/view/704810.30612/agrarian.v12i45.7048Agrarian; v. 12 n. 45 (2019); 279-285Agrarian Journal; Vol. 12 No. 45 (2019); 279-2851984-2538reponame:Agrarian (Dourados. Online)instname:Universidade Federal da Grande Dourados (UFGD)instacron:UFGDenghttps://ojs.ufgd.edu.br/index.php/agrarian/article/view/7048/5336Copyright (c) 2019 Agrarianinfo:eu-repo/semantics/openAccessSilva, Josefa Maria Francieli daSarmento, Hercules Gustavo SantosAraújo, Hellen Thayse NascimentoOliveira, Alexandre Bosco deOliveira, Lamartine Soares Cardoso de2019-10-14T15:33:19Zoai:ojs.pkp.sfu.ca:article/7048Revistahttps://ojs.ufgd.edu.br/index.php/agrarianPUBhttps://ojs.ufgd.edu.br/index.php/agrarian/oairevistaagrarian@ufgd.edu.br||1984-25381984-252Xopendoar:http://ojs.ufgd.edu.br/index.php/agrarian/oaihttp://ojs.ufgd.edu.br/index.php/agrarian/oai2019-10-14T15:33:19Agrarian (Dourados. Online) - Universidade Federal da Grande Dourados (UFGD)false |
dc.title.none.fl_str_mv |
Weeds in pastures: a phytosociological approach in Ceara areas Ervas daninha em pastagens: uma abordagem fitossociológica nas áreas do Ceará |
title |
Weeds in pastures: a phytosociological approach in Ceara areas |
spellingShingle |
Weeds in pastures: a phytosociological approach in Ceara areas Silva, Josefa Maria Francieli da Brachiaria decumbens fitossociologia índice de valor de importância Brachiaria decumbens fitossociologia índice de valor de importância |
title_short |
Weeds in pastures: a phytosociological approach in Ceara areas |
title_full |
Weeds in pastures: a phytosociological approach in Ceara areas |
title_fullStr |
Weeds in pastures: a phytosociological approach in Ceara areas |
title_full_unstemmed |
Weeds in pastures: a phytosociological approach in Ceara areas |
title_sort |
Weeds in pastures: a phytosociological approach in Ceara areas |
author |
Silva, Josefa Maria Francieli da |
author_facet |
Silva, Josefa Maria Francieli da Sarmento, Hercules Gustavo Santos Araújo, Hellen Thayse Nascimento Oliveira, Alexandre Bosco de Oliveira, Lamartine Soares Cardoso de |
author_role |
author |
author2 |
Sarmento, Hercules Gustavo Santos Araújo, Hellen Thayse Nascimento Oliveira, Alexandre Bosco de Oliveira, Lamartine Soares Cardoso de |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Silva, Josefa Maria Francieli da Sarmento, Hercules Gustavo Santos Araújo, Hellen Thayse Nascimento Oliveira, Alexandre Bosco de Oliveira, Lamartine Soares Cardoso de |
dc.subject.por.fl_str_mv |
Brachiaria decumbens fitossociologia índice de valor de importância Brachiaria decumbens fitossociologia índice de valor de importância |
topic |
Brachiaria decumbens fitossociologia índice de valor de importância Brachiaria decumbens fitossociologia índice de valor de importância |
description |
The aim of this study was to study the phytosociology of weed species in areas of pasture cultivated with Brachiaria decumbens and Cynodon sp. (Tifton 85), in Ceará State, Brazil. The square inventory methodology was used in order to assess the weed community. Weed samples were quantified and classified by family, genus and species, using books and classification keys. The classification and quantification data of species allowed to calculate the following phytosociological variables: frequency (F), relative frequency (Fr), density (D), relative density (Dr), absolute dominance (DoA), relative dominance (DoR), importance value index (IVI), and similarity index (IS). The Amaranthaceae family was the one with the greatest intensity of species in both areas, represented mainly by Alternanthera tenera colla and Amaranthus viridis. In the area cultivated with B. decumbens, Cyperus rotundus presented higher results for frequency, density and abundance. In the Tifton 85 area, Nicandra physalodes presented higher values of density and abundance. The similarity of weed populations in pasture areas was 42.11%, with four species common to both areas. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-10-12 |
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://ojs.ufgd.edu.br/index.php/agrarian/article/view/7048 10.30612/agrarian.v12i45.7048 |
url |
https://ojs.ufgd.edu.br/index.php/agrarian/article/view/7048 |
identifier_str_mv |
10.30612/agrarian.v12i45.7048 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://ojs.ufgd.edu.br/index.php/agrarian/article/view/7048/5336 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2019 Agrarian info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2019 Agrarian |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Editora UFGD |
publisher.none.fl_str_mv |
Editora UFGD |
dc.source.none.fl_str_mv |
Agrarian; v. 12 n. 45 (2019); 279-285 Agrarian Journal; Vol. 12 No. 45 (2019); 279-285 1984-2538 reponame:Agrarian (Dourados. Online) instname:Universidade Federal da Grande Dourados (UFGD) instacron:UFGD |
instname_str |
Universidade Federal da Grande Dourados (UFGD) |
instacron_str |
UFGD |
institution |
UFGD |
reponame_str |
Agrarian (Dourados. Online) |
collection |
Agrarian (Dourados. Online) |
repository.name.fl_str_mv |
Agrarian (Dourados. Online) - Universidade Federal da Grande Dourados (UFGD) |
repository.mail.fl_str_mv |
revistaagrarian@ufgd.edu.br|| |
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1792205858238627840 |