Comparison of mathematical models in estimating flooded rice grain yield losses
Autor(a) principal: | |
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Data de Publicação: | 2004 |
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/6848 |
Resumo: | The objectives of this work were to compare mathematical models and identify, among morphologic variables, the one better adjusted to rice grain yield losses by interference of EEA 406 cultivar, simulating red rice. Four experiments were carried out, one in the field and the others in a greenhouse. Rice cultivars BRS-38 Ligeirinho, IRGA 417, and BR-IRGA 409, were studied in the field in row widths of 15 and 25 cm, and populations (ten levels) of concurrent cultivar. In greenhouse, tests in monocultures were carried out in a replacement series model. Data analysis were accomplished with application of linear and non linear regression models. The best adjustment of rice grain yield losses data was attained using the model with two parameters. Leaf area and soil coverage estimated better grain yield loss than dry weight of the simulating cultivar. The models show that reduction of crop row width increases the competitive ability of rice cultivars in relation to the concurrent genotypes. |
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Comparison of mathematical models in estimating flooded rice grain yield lossesComparação de modelos matemáticos na estimativa das perdas de produtividade de grãos em arroz irrigadoOryza sativa; rice cultivars; row widthOryza sativa; cultivares de arroz; espaçamento entrelinhasThe objectives of this work were to compare mathematical models and identify, among morphologic variables, the one better adjusted to rice grain yield losses by interference of EEA 406 cultivar, simulating red rice. Four experiments were carried out, one in the field and the others in a greenhouse. Rice cultivars BRS-38 Ligeirinho, IRGA 417, and BR-IRGA 409, were studied in the field in row widths of 15 and 25 cm, and populations (ten levels) of concurrent cultivar. In greenhouse, tests in monocultures were carried out in a replacement series model. Data analysis were accomplished with application of linear and non linear regression models. The best adjustment of rice grain yield losses data was attained using the model with two parameters. Leaf area and soil coverage estimated better grain yield loss than dry weight of the simulating cultivar. The models show that reduction of crop row width increases the competitive ability of rice cultivars in relation to the concurrent genotypes.Os objetivos deste trabalho foram comparar modelos matemáticos e identificar, entre variáveis morfológicas, a de melhor ajuste na previsão de perdas de produtividade em arroz irrigado por interferência da cultivar EEA 406, simuladora de arroz-vermelho. Foram realizados quatro experimentos, sendo um no campo e os demais em casa de vegetação. Três cultivares de arroz, BRS-38 Ligeirinho, IRGA 417 e BR-IRGA 409, foram estudadas no campo, com espaçamento entrelinhas de 15 e 25 cm, além de populações da cultivar competidora (dez níveis). Em casa de vegetação, realizaram-se experimentos em monocultivos e em série de substituição. A análise dos dados foi realizada com aplicação de modelos lineares e não lineares de regressão. O melhor ajuste dos dados de perdas de produtividade em arroz foi encontrado com o modelo de dois parâmetros. Área foliar e cobertura do solo estimaram melhor as perdas de produtividade de grãos do que a massa seca da cultivar simuladora. Os modelos testados indicam que a redução do espaçamento entrelinhas aumenta a habilidade competitiva das cultivares de arroz em relação à cultivar concorrente.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraAgostinetto, DirceuFleck, Nilson GilbertoRizzardi, Mauro AntonioBianchi, Mário AntônioSilva, Paulo Régis Ferreira da2004-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/6848Pesquisa Agropecuaria Brasileira; v.39, n.9, set. 2004; 847-856Pesquisa Agropecuária Brasileira; v.39, n.9, set. 2004; 847-8561678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/6848/3904info:eu-repo/semantics/openAccess2014-08-25T19:54:34Zoai:ojs.seer.sct.embrapa.br:article/6848Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-08-25T19:54:34Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Comparison of mathematical models in estimating flooded rice grain yield losses Comparação de modelos matemáticos na estimativa das perdas de produtividade de grãos em arroz irrigado |
title |
Comparison of mathematical models in estimating flooded rice grain yield losses |
spellingShingle |
Comparison of mathematical models in estimating flooded rice grain yield losses Agostinetto, Dirceu Oryza sativa; rice cultivars; row width Oryza sativa; cultivares de arroz; espaçamento entrelinhas |
title_short |
Comparison of mathematical models in estimating flooded rice grain yield losses |
title_full |
Comparison of mathematical models in estimating flooded rice grain yield losses |
title_fullStr |
Comparison of mathematical models in estimating flooded rice grain yield losses |
title_full_unstemmed |
Comparison of mathematical models in estimating flooded rice grain yield losses |
title_sort |
Comparison of mathematical models in estimating flooded rice grain yield losses |
author |
Agostinetto, Dirceu |
author_facet |
Agostinetto, Dirceu Fleck, Nilson Gilberto Rizzardi, Mauro Antonio Bianchi, Mário Antônio Silva, Paulo Régis Ferreira da |
author_role |
author |
author2 |
Fleck, Nilson Gilberto Rizzardi, Mauro Antonio Bianchi, Mário Antônio Silva, Paulo Régis Ferreira da |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Agostinetto, Dirceu Fleck, Nilson Gilberto Rizzardi, Mauro Antonio Bianchi, Mário Antônio Silva, Paulo Régis Ferreira da |
dc.subject.por.fl_str_mv |
Oryza sativa; rice cultivars; row width Oryza sativa; cultivares de arroz; espaçamento entrelinhas |
topic |
Oryza sativa; rice cultivars; row width Oryza sativa; cultivares de arroz; espaçamento entrelinhas |
description |
The objectives of this work were to compare mathematical models and identify, among morphologic variables, the one better adjusted to rice grain yield losses by interference of EEA 406 cultivar, simulating red rice. Four experiments were carried out, one in the field and the others in a greenhouse. Rice cultivars BRS-38 Ligeirinho, IRGA 417, and BR-IRGA 409, were studied in the field in row widths of 15 and 25 cm, and populations (ten levels) of concurrent cultivar. In greenhouse, tests in monocultures were carried out in a replacement series model. Data analysis were accomplished with application of linear and non linear regression models. The best adjustment of rice grain yield losses data was attained using the model with two parameters. Leaf area and soil coverage estimated better grain yield loss than dry weight of the simulating cultivar. The models show that reduction of crop row width increases the competitive ability of rice cultivars in relation to the concurrent genotypes. |
publishDate |
2004 |
dc.date.none.fl_str_mv |
2004-09-01 |
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/6848 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/6848 |
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/6848/3904 |
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.39, n.9, set. 2004; 847-856 Pesquisa Agropecuária Brasileira; v.39, n.9, set. 2004; 847-856 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 |
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1793416708480827392 |