Rows and rows-end border effect at two levels of nitrogen on four cultivars of rice in Southeast Rio Grande do Sul, Brazil
Autor(a) principal: | |
---|---|
Data de Publicação: | 2014 |
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/15588 |
Resumo: | The objective of this research was to determine the occurrence of rows border effect and the extension of rows-end border effect on the yield of four rice cultivars (Oryza sativa L.) grown in the field, at two levels of nitrogen: 30 kg/ha and 60 kg/ha. IAS 12-9 Formosa showed the most outstanding reaction to the different cultivars in border rows, followed by IRGA-408 and EEA-406; Bluebelle was the less sensitive lo border effect. The average yield of the four cultivars in middle rows was statistically greater with 60 kg/ha than with 30 kg/ha of nitrogen when IRGA-408 was at the border rows; conversely, the mean yield was significantly smaller under 60 kg/ha of nitrogen, with EEA-406 at the border rows. As to the rows-end border effect, the results indicated that in the first 0,25 m of every row the higher yields were similar for the four cultivars. However, on IAS 12-9 Formosa, 0,50 m of rows-end trimming is sufficient to remove border effect; for Bluebelle the extension of the rows-end trimming necessary to eliminate that effect could not be clearly established (0,50 m or 0,75 m); on EEA-406 and IRGA-408 there is rows-end border effect up to 0,75 m. Therefore, the use of rows-end trimming in rice yield trial plots is indicated and the extension of the end-trimming should vary according to the cultivar. The rows border effect varied according to the cultivar in the middle rows. |
id |
EMBRAPA-4_20dd8019676b956f4f0bc211e733980c |
---|---|
oai_identifier_str |
oai:ojs.seer.sct.embrapa.br:article/15588 |
network_acronym_str |
EMBRAPA-4 |
network_name_str |
Pesquisa Agropecuária Brasileira (Online) |
repository_id_str |
|
spelling |
Rows and rows-end border effect at two levels of nitrogen on four cultivars of rice in Southeast Rio Grande do Sul, BrazilEfeito de bordadura lateral e de extremidades de fileiras, sob dois níveis de nitrogênio, em quatro cultivares de arroz na região sudeste do Rio Grande do Sul, Brasilirrigated rice; Oryza sativa L.; level of nitrogen; yieldarroz irrigado; Oryza sativa L.; nível de nitrogênio; rendimentoThe objective of this research was to determine the occurrence of rows border effect and the extension of rows-end border effect on the yield of four rice cultivars (Oryza sativa L.) grown in the field, at two levels of nitrogen: 30 kg/ha and 60 kg/ha. IAS 12-9 Formosa showed the most outstanding reaction to the different cultivars in border rows, followed by IRGA-408 and EEA-406; Bluebelle was the less sensitive lo border effect. The average yield of the four cultivars in middle rows was statistically greater with 60 kg/ha than with 30 kg/ha of nitrogen when IRGA-408 was at the border rows; conversely, the mean yield was significantly smaller under 60 kg/ha of nitrogen, with EEA-406 at the border rows. As to the rows-end border effect, the results indicated that in the first 0,25 m of every row the higher yields were similar for the four cultivars. However, on IAS 12-9 Formosa, 0,50 m of rows-end trimming is sufficient to remove border effect; for Bluebelle the extension of the rows-end trimming necessary to eliminate that effect could not be clearly established (0,50 m or 0,75 m); on EEA-406 and IRGA-408 there is rows-end border effect up to 0,75 m. Therefore, the use of rows-end trimming in rice yield trial plots is indicated and the extension of the end-trimming should vary according to the cultivar. The rows border effect varied according to the cultivar in the middle rows.Esta pesquisa teve como objetivo determinar a ocorrência do efeito de bordadura lateral e a extensão do efeito de bordadura de extremidades de fileiras, quando se usam dois níveis de nitrogênio (30 kg/ha e 60 kg/ha), sobre o rendimento de parcela de quatro cultivares de arroz (Oryza sativa L.). IAS 12-9 Formosa foi a cultivar que mais respondeu aos efeitos exercidos pelas outras cultivares em bordadura lateral, seguindo-se-lhe IRGA-408 e EEA-406; Bluebelle foi a menos sensível a esses efeitos. Quando IRGA-408 ocupava a bordadura lateral, a média da produção das quatro cultivares em fileiras centrais foi estatisticamente maior com 60 kg/ha do que com 30 kg/ha de nitrogênio; aconteceu o inverso quando EEA-406 estava em bordadura lateral. Quanto aos efeitos de bordadura de extremidades de fileiras, observou-se que nos primeiros 0,25 m de extremidades de fileiras, o aumento de produção que ocorreu foi estatisticamente similar para todas as cultivares. Porém, para IAS 12-9 Formosa, esse efeito estava presente até 0,50 m das extremidades das fileiras; para Bluebelle, a extensão de extremidades de fileiras necessária para remover o efeito de bordadura não ficou bem definida (0,50 m ou 0,75 m); para EEA-406 e IRGA-408, esse efeito aparece até 0,75 m das extremidades. Conclui-se que é indispensável o uso de bordadura de extremidades de fileiras, em extensão variável segundo o fenótipo da cultivar, nas parcelas dos ensaios de avaliação de rendimento de cultivares de arroz e que o efeito de bordadura lateral varia segundo o fenótipo da cultivar em fileiras centrais.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraVernetti, Veronica PeixotoVernetti, Francisco de JesusJunior, Paulo Silveira2014-04-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/15588Pesquisa Agropecuaria Brasileira; v.17, n.2, fev. 1982; 185-194Pesquisa Agropecuária Brasileira; v.17, n.2, fev. 1982; 185-1941678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/15588/9585info:eu-repo/semantics/openAccess2014-04-16T12:24:16Zoai:ojs.seer.sct.embrapa.br:article/15588Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-04-16T12:24:16Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Rows and rows-end border effect at two levels of nitrogen on four cultivars of rice in Southeast Rio Grande do Sul, Brazil Efeito de bordadura lateral e de extremidades de fileiras, sob dois níveis de nitrogênio, em quatro cultivares de arroz na região sudeste do Rio Grande do Sul, Brasil |
title |
Rows and rows-end border effect at two levels of nitrogen on four cultivars of rice in Southeast Rio Grande do Sul, Brazil |
spellingShingle |
Rows and rows-end border effect at two levels of nitrogen on four cultivars of rice in Southeast Rio Grande do Sul, Brazil Vernetti, Veronica Peixoto irrigated rice; Oryza sativa L.; level of nitrogen; yield arroz irrigado; Oryza sativa L.; nível de nitrogênio; rendimento |
title_short |
Rows and rows-end border effect at two levels of nitrogen on four cultivars of rice in Southeast Rio Grande do Sul, Brazil |
title_full |
Rows and rows-end border effect at two levels of nitrogen on four cultivars of rice in Southeast Rio Grande do Sul, Brazil |
title_fullStr |
Rows and rows-end border effect at two levels of nitrogen on four cultivars of rice in Southeast Rio Grande do Sul, Brazil |
title_full_unstemmed |
Rows and rows-end border effect at two levels of nitrogen on four cultivars of rice in Southeast Rio Grande do Sul, Brazil |
title_sort |
Rows and rows-end border effect at two levels of nitrogen on four cultivars of rice in Southeast Rio Grande do Sul, Brazil |
author |
Vernetti, Veronica Peixoto |
author_facet |
Vernetti, Veronica Peixoto Vernetti, Francisco de Jesus Junior, Paulo Silveira |
author_role |
author |
author2 |
Vernetti, Francisco de Jesus Junior, Paulo Silveira |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Vernetti, Veronica Peixoto Vernetti, Francisco de Jesus Junior, Paulo Silveira |
dc.subject.por.fl_str_mv |
irrigated rice; Oryza sativa L.; level of nitrogen; yield arroz irrigado; Oryza sativa L.; nível de nitrogênio; rendimento |
topic |
irrigated rice; Oryza sativa L.; level of nitrogen; yield arroz irrigado; Oryza sativa L.; nível de nitrogênio; rendimento |
description |
The objective of this research was to determine the occurrence of rows border effect and the extension of rows-end border effect on the yield of four rice cultivars (Oryza sativa L.) grown in the field, at two levels of nitrogen: 30 kg/ha and 60 kg/ha. IAS 12-9 Formosa showed the most outstanding reaction to the different cultivars in border rows, followed by IRGA-408 and EEA-406; Bluebelle was the less sensitive lo border effect. The average yield of the four cultivars in middle rows was statistically greater with 60 kg/ha than with 30 kg/ha of nitrogen when IRGA-408 was at the border rows; conversely, the mean yield was significantly smaller under 60 kg/ha of nitrogen, with EEA-406 at the border rows. As to the rows-end border effect, the results indicated that in the first 0,25 m of every row the higher yields were similar for the four cultivars. However, on IAS 12-9 Formosa, 0,50 m of rows-end trimming is sufficient to remove border effect; for Bluebelle the extension of the rows-end trimming necessary to eliminate that effect could not be clearly established (0,50 m or 0,75 m); on EEA-406 and IRGA-408 there is rows-end border effect up to 0,75 m. Therefore, the use of rows-end trimming in rice yield trial plots is indicated and the extension of the end-trimming should vary according to the cultivar. The rows border effect varied according to the cultivar in the middle rows. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-04-16 |
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/15588 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/15588 |
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/15588/9585 |
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.17, n.2, fev. 1982; 185-194 Pesquisa Agropecuária Brasileira; v.17, n.2, fev. 1982; 185-194 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_ |
1793416656112844800 |