Nitrogen sufficiency index for estimating nitrogen fertilizer requirement of irrigated rice.
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
Texto Completo: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/1118934 |
Resumo: | The proper nitrogen management is required to achieve high irrigated rice yield. This study aimed to determine the rice response to nitrogen topdressing doses and calibrate the chlorophyll meter reading. Three experiments were conducted in a randomized block design. In the first experiment, five N rates (0, 30, 60, 90, and 120 kg ha-1) were evaluated as the first, and 30 kg ha-1 N as the second topdressing, which were combined with the application of 30 kg ha-1 N as the first and five N rates, as the second topdressing. The other experiments assessed the application of 30 kg ha-1 of N, as the first, and four N rates (0, 40, 80, and 120 kg ha-1), as the second topdressing. There was a response to N application, with maximum technical efficiency reaching 33 kg ha-1 in the first and between 40 and 50 kg ha-1 in the second topdressing. The chlorophyll meter was sensitive to estimate the amount of N to be applied in topdressing, using the nitrogen sufficiency index (NSI). To each percent unit of NSI below 95%, one should apply 10 kg ha-1 of N as the first and 2-3 kg ha-1 of N as the second topdressing. |
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Nitrogen sufficiency index for estimating nitrogen fertilizer requirement of irrigated rice.Nitrogen topdressingOryza SativaNitrogênioFertilizante NitrogenadoArroz IrrigadoClorofilaRiceIrrigation managementNitrogen fertilizersChlorophyllGrain yieldThe proper nitrogen management is required to achieve high irrigated rice yield. This study aimed to determine the rice response to nitrogen topdressing doses and calibrate the chlorophyll meter reading. Three experiments were conducted in a randomized block design. In the first experiment, five N rates (0, 30, 60, 90, and 120 kg ha-1) were evaluated as the first, and 30 kg ha-1 N as the second topdressing, which were combined with the application of 30 kg ha-1 N as the first and five N rates, as the second topdressing. The other experiments assessed the application of 30 kg ha-1 of N, as the first, and four N rates (0, 40, 80, and 120 kg ha-1), as the second topdressing. There was a response to N application, with maximum technical efficiency reaching 33 kg ha-1 in the first and between 40 and 50 kg ha-1 in the second topdressing. The chlorophyll meter was sensitive to estimate the amount of N to be applied in topdressing, using the nitrogen sufficiency index (NSI). To each percent unit of NSI below 95%, one should apply 10 kg ha-1 of N as the first and 2-3 kg ha-1 of N as the second topdressing.ALBERTO BAETA DOS SANTOS, CNPAF; MELLISSA ANANIAS SOLER DA SILVA, CNPAF; PEDRO MARQUES DA SILVEIRA, CNPAF; GLAUCILENE DUARTE CARVALHO, SECIMA, Goiânia-GO; LUIS FERNANDO STONE, CNPAF.SANTOS, A. B. dosSILVA, M. A. S. daSILVEIRA, P. M. daCARVALHO, G. D.STONE, L. F.2020-01-17T18:07:25Z2020-01-17T18:07:25Z2020-01-1720192020-02-13T11:11:11Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleRevista Ceres, v. 66, n. 6, p. 422-430, nov./dez. 2019.2177-3491http://www.alice.cnptia.embrapa.br/alice/handle/doc/111893410.1590/0034-737X201966060003enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2020-01-17T18:07:30Zoai:www.alice.cnptia.embrapa.br:doc/1118934Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542020-01-17T18:07:30Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Nitrogen sufficiency index for estimating nitrogen fertilizer requirement of irrigated rice. |
title |
Nitrogen sufficiency index for estimating nitrogen fertilizer requirement of irrigated rice. |
spellingShingle |
Nitrogen sufficiency index for estimating nitrogen fertilizer requirement of irrigated rice. SANTOS, A. B. dos Nitrogen topdressing Oryza Sativa Nitrogênio Fertilizante Nitrogenado Arroz Irrigado Clorofila Rice Irrigation management Nitrogen fertilizers Chlorophyll Grain yield |
title_short |
Nitrogen sufficiency index for estimating nitrogen fertilizer requirement of irrigated rice. |
title_full |
Nitrogen sufficiency index for estimating nitrogen fertilizer requirement of irrigated rice. |
title_fullStr |
Nitrogen sufficiency index for estimating nitrogen fertilizer requirement of irrigated rice. |
title_full_unstemmed |
Nitrogen sufficiency index for estimating nitrogen fertilizer requirement of irrigated rice. |
title_sort |
Nitrogen sufficiency index for estimating nitrogen fertilizer requirement of irrigated rice. |
author |
SANTOS, A. B. dos |
author_facet |
SANTOS, A. B. dos SILVA, M. A. S. da SILVEIRA, P. M. da CARVALHO, G. D. STONE, L. F. |
author_role |
author |
author2 |
SILVA, M. A. S. da SILVEIRA, P. M. da CARVALHO, G. D. STONE, L. F. |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
ALBERTO BAETA DOS SANTOS, CNPAF; MELLISSA ANANIAS SOLER DA SILVA, CNPAF; PEDRO MARQUES DA SILVEIRA, CNPAF; GLAUCILENE DUARTE CARVALHO, SECIMA, Goiânia-GO; LUIS FERNANDO STONE, CNPAF. |
dc.contributor.author.fl_str_mv |
SANTOS, A. B. dos SILVA, M. A. S. da SILVEIRA, P. M. da CARVALHO, G. D. STONE, L. F. |
dc.subject.por.fl_str_mv |
Nitrogen topdressing Oryza Sativa Nitrogênio Fertilizante Nitrogenado Arroz Irrigado Clorofila Rice Irrigation management Nitrogen fertilizers Chlorophyll Grain yield |
topic |
Nitrogen topdressing Oryza Sativa Nitrogênio Fertilizante Nitrogenado Arroz Irrigado Clorofila Rice Irrigation management Nitrogen fertilizers Chlorophyll Grain yield |
description |
The proper nitrogen management is required to achieve high irrigated rice yield. This study aimed to determine the rice response to nitrogen topdressing doses and calibrate the chlorophyll meter reading. Three experiments were conducted in a randomized block design. In the first experiment, five N rates (0, 30, 60, 90, and 120 kg ha-1) were evaluated as the first, and 30 kg ha-1 N as the second topdressing, which were combined with the application of 30 kg ha-1 N as the first and five N rates, as the second topdressing. The other experiments assessed the application of 30 kg ha-1 of N, as the first, and four N rates (0, 40, 80, and 120 kg ha-1), as the second topdressing. There was a response to N application, with maximum technical efficiency reaching 33 kg ha-1 in the first and between 40 and 50 kg ha-1 in the second topdressing. The chlorophyll meter was sensitive to estimate the amount of N to be applied in topdressing, using the nitrogen sufficiency index (NSI). To each percent unit of NSI below 95%, one should apply 10 kg ha-1 of N as the first and 2-3 kg ha-1 of N as the second topdressing. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019 2020-01-17T18:07:25Z 2020-01-17T18:07:25Z 2020-01-17 2020-02-13T11:11:11Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Revista Ceres, v. 66, n. 6, p. 422-430, nov./dez. 2019. 2177-3491 http://www.alice.cnptia.embrapa.br/alice/handle/doc/1118934 10.1590/0034-737X201966060003 |
identifier_str_mv |
Revista Ceres, v. 66, n. 6, p. 422-430, nov./dez. 2019. 2177-3491 10.1590/0034-737X201966060003 |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1118934 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
collection |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
repository.name.fl_str_mv |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
cg-riaa@embrapa.br |
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1817695583203229696 |