NITROGEN DOSES AND APPLICATION TIMES IN LOWLAND RICE
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Pesquisa Agropecuária Tropical (Online) |
Texto Completo: | https://revistas.ufg.br/pat/article/view/7776 |
Resumo: | The most outstanding crop, concerning agribusiness in the Roraima State, is lowland rice. Therefore, the recommendation of new cultivars, as well as the study of correct handling for nitrogen fertilizing, are important to maximize grain yield and reduce production costs and environmental impacts. Thus, the objective of this study was to identify the nitrogen doses and application times most adjusted to the rice cultivar BRS Jaçanã, in Roraima lowlands. The experiment took place at the Santa Cecília Farm, a lowland area of the Rio Branco river, in Cantá, Roraima State, Brazil, from December (2007) to March (2008), on a tb distrophic haplic gleissol. The experiments were conducted under a split-plot scheme, with plots displayed under a randomized blocks design with four replicates. Treatments consisted of four N doses (50 kg ha-1, 100 kg ha-1, 150 kg ha-1, and 200 kg ha-1), combined with four application times: E1 - half dose at sowing and half 45 days after emergence (dae); E2 - half dose 15 days after emergence (dae) and half 45 days after emergence (dae); E3 - one application 15 days after emergence (dae); and E4 - one application 45 days after emergence (dae), totalizing 16 treatments and 64 experimental units. Concerning the BRS Jaçanã lowland rice cultivar, the best combination was the application of 118 kg ha-1 of nitrogen, half at sowing and half 45 days after emergence. KEY-WORDS: Oryza sativa L.; lowland rice; maximum economic yield. |
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NITROGEN DOSES AND APPLICATION TIMES IN LOWLAND RICEDOSES E ÉPOCAS DE APLICAÇÃO DE NITROGÊNIO EM ARROZ DE VÁRZEAOryza sativa L.lowland ricemaximum economic yieldOryza sativa L.arroz irrigadoprodutividade máxima econômicaThe most outstanding crop, concerning agribusiness in the Roraima State, is lowland rice. Therefore, the recommendation of new cultivars, as well as the study of correct handling for nitrogen fertilizing, are important to maximize grain yield and reduce production costs and environmental impacts. Thus, the objective of this study was to identify the nitrogen doses and application times most adjusted to the rice cultivar BRS Jaçanã, in Roraima lowlands. The experiment took place at the Santa Cecília Farm, a lowland area of the Rio Branco river, in Cantá, Roraima State, Brazil, from December (2007) to March (2008), on a tb distrophic haplic gleissol. The experiments were conducted under a split-plot scheme, with plots displayed under a randomized blocks design with four replicates. Treatments consisted of four N doses (50 kg ha-1, 100 kg ha-1, 150 kg ha-1, and 200 kg ha-1), combined with four application times: E1 - half dose at sowing and half 45 days after emergence (dae); E2 - half dose 15 days after emergence (dae) and half 45 days after emergence (dae); E3 - one application 15 days after emergence (dae); and E4 - one application 45 days after emergence (dae), totalizing 16 treatments and 64 experimental units. Concerning the BRS Jaçanã lowland rice cultivar, the best combination was the application of 118 kg ha-1 of nitrogen, half at sowing and half 45 days after emergence. KEY-WORDS: Oryza sativa L.; lowland rice; maximum economic yield. No Estado de Roraima, a cultura que mais se destaca no setor do agronegócio é a do arroz irrigado por inundação. Por isto, tanto a recomendação de novas cultivares, quanto o estudo do manejo correto da adubação nitrogenada são importantes para a maximização da produtividade de grãos e redução de custos de produção e impactos ambientais. Assim, o objetivo deste trabalho foi identificar as doses e épocas de aplicação de nitrogênio mais adequadas para a cultivar de arroz BRS Jaçanã, em várzea de Roraima. O experimento foi conduzido na Fazenda Santa Cecília, em área de várzea do Rio Branco, no município de Cantá, no período de dezembro de 2007 a março de 2008, em Gleissolo Háplico tb distrófíco. Utilizaram-se parcelas subdivididas, distribuídas conforme delineamento em blocos casualizados, com quatro repetições. Os tratamentos foram constituídos de quatro doses de N (50 kg ha-1, 100 kg ha-1, 150 kg ha-1 e 200 kg ha-1), como subparcelas, combinadas com quatro épocas de aplicação, como parcelas: E1 - metade da dose na semeadura e metade aos 45 dias após a emergência (dae); E2 - metade da dose aos 15 e metade aos 45 dae; E3 - uma aplicação, aos 15 dae; e E4 - uma aplicação, aos 45 dae, totalizando 16 tratamentos e 64 unidades experimentais. Para a cultivar de arroz irrigado BRS Jaçanã, a melhor combinação foi a aplicação de 118 kg ha-1 de N, distribuídos metade na semeadura e metade aos 45 dias após a emergência. PALAVRAS-CHAVE: Oryza sativa L.; arroz irrigado; produtividade máxima econômica. Escola de Agronomia - Universidade Federal de Goiás2011-01-26info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/savehttps://revistas.ufg.br/pat/article/view/7776Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics]; v. 41, n. 1, Jan./Mar. 2011; 29-38Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics); v. 41, n. 1, jan./mar. 2011; 29-38Pesquisa Agropecuária Tropical; v. 41, n. 1, jan./mar. 2011; 29-381983-4063reponame:Pesquisa Agropecuária Tropical (Online)instname:Universidade Federal de Goiás (UFG)instacron:UFGporhttps://revistas.ufg.br/pat/article/view/7776/8505Copyright (c) 2020 Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics)info:eu-repo/semantics/openAccessFabre, Dâmaris Vieira OliveiraCordeiro, Antônio Carlos CentenoFerreira, Gilvan BarbosaVilarinho, Aloísio AlcântaraMedeiros, Roberto Dantas de2020-07-09T18:23:02Zoai:ojs.revistas.ufg.br:article/7776Revistahttps://revistas.ufg.br/patPUBhttps://revistas.ufg.br/pat/oaiaseleguini.pat@gmail.com||mgoes@agro.ufg.br1983-40631517-6398opendoar:2024-05-21T19:55:46.451368Pesquisa Agropecuária Tropical (Online) - Universidade Federal de Goiás (UFG)true |
dc.title.none.fl_str_mv |
NITROGEN DOSES AND APPLICATION TIMES IN LOWLAND RICE DOSES E ÉPOCAS DE APLICAÇÃO DE NITROGÊNIO EM ARROZ DE VÁRZEA |
title |
NITROGEN DOSES AND APPLICATION TIMES IN LOWLAND RICE |
spellingShingle |
NITROGEN DOSES AND APPLICATION TIMES IN LOWLAND RICE Fabre, Dâmaris Vieira Oliveira Oryza sativa L. lowland rice maximum economic yield Oryza sativa L. arroz irrigado produtividade máxima econômica |
title_short |
NITROGEN DOSES AND APPLICATION TIMES IN LOWLAND RICE |
title_full |
NITROGEN DOSES AND APPLICATION TIMES IN LOWLAND RICE |
title_fullStr |
NITROGEN DOSES AND APPLICATION TIMES IN LOWLAND RICE |
title_full_unstemmed |
NITROGEN DOSES AND APPLICATION TIMES IN LOWLAND RICE |
title_sort |
NITROGEN DOSES AND APPLICATION TIMES IN LOWLAND RICE |
author |
Fabre, Dâmaris Vieira Oliveira |
author_facet |
Fabre, Dâmaris Vieira Oliveira Cordeiro, Antônio Carlos Centeno Ferreira, Gilvan Barbosa Vilarinho, Aloísio Alcântara Medeiros, Roberto Dantas de |
author_role |
author |
author2 |
Cordeiro, Antônio Carlos Centeno Ferreira, Gilvan Barbosa Vilarinho, Aloísio Alcântara Medeiros, Roberto Dantas de |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Fabre, Dâmaris Vieira Oliveira Cordeiro, Antônio Carlos Centeno Ferreira, Gilvan Barbosa Vilarinho, Aloísio Alcântara Medeiros, Roberto Dantas de |
dc.subject.por.fl_str_mv |
Oryza sativa L. lowland rice maximum economic yield Oryza sativa L. arroz irrigado produtividade máxima econômica |
topic |
Oryza sativa L. lowland rice maximum economic yield Oryza sativa L. arroz irrigado produtividade máxima econômica |
description |
The most outstanding crop, concerning agribusiness in the Roraima State, is lowland rice. Therefore, the recommendation of new cultivars, as well as the study of correct handling for nitrogen fertilizing, are important to maximize grain yield and reduce production costs and environmental impacts. Thus, the objective of this study was to identify the nitrogen doses and application times most adjusted to the rice cultivar BRS Jaçanã, in Roraima lowlands. The experiment took place at the Santa Cecília Farm, a lowland area of the Rio Branco river, in Cantá, Roraima State, Brazil, from December (2007) to March (2008), on a tb distrophic haplic gleissol. The experiments were conducted under a split-plot scheme, with plots displayed under a randomized blocks design with four replicates. Treatments consisted of four N doses (50 kg ha-1, 100 kg ha-1, 150 kg ha-1, and 200 kg ha-1), combined with four application times: E1 - half dose at sowing and half 45 days after emergence (dae); E2 - half dose 15 days after emergence (dae) and half 45 days after emergence (dae); E3 - one application 15 days after emergence (dae); and E4 - one application 45 days after emergence (dae), totalizing 16 treatments and 64 experimental units. Concerning the BRS Jaçanã lowland rice cultivar, the best combination was the application of 118 kg ha-1 of nitrogen, half at sowing and half 45 days after emergence. KEY-WORDS: Oryza sativa L.; lowland rice; maximum economic yield. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-01-26 |
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://revistas.ufg.br/pat/article/view/7776 |
url |
https://revistas.ufg.br/pat/article/view/7776 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://revistas.ufg.br/pat/article/view/7776/8505 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2020 Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics) info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2020 Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics) |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/save |
dc.publisher.none.fl_str_mv |
Escola de Agronomia - Universidade Federal de Goiás |
publisher.none.fl_str_mv |
Escola de Agronomia - Universidade Federal de Goiás |
dc.source.none.fl_str_mv |
Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics]; v. 41, n. 1, Jan./Mar. 2011; 29-38 Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics); v. 41, n. 1, jan./mar. 2011; 29-38 Pesquisa Agropecuária Tropical; v. 41, n. 1, jan./mar. 2011; 29-38 1983-4063 reponame:Pesquisa Agropecuária Tropical (Online) instname:Universidade Federal de Goiás (UFG) instacron:UFG |
instname_str |
Universidade Federal de Goiás (UFG) |
instacron_str |
UFG |
institution |
UFG |
reponame_str |
Pesquisa Agropecuária Tropical (Online) |
collection |
Pesquisa Agropecuária Tropical (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Tropical (Online) - Universidade Federal de Goiás (UFG) |
repository.mail.fl_str_mv |
aseleguini.pat@gmail.com||mgoes@agro.ufg.br |
_version_ |
1799874817183186944 |