Nitrogen sufficiency index for estimating nitrogen fertilizer requirement of irrigated rice.

Detalhes bibliográficos
Autor(a) principal: SANTOS, A. B. dos
Data de Publicação: 2019
Outros Autores: SILVA, M. A. S. da, SILVEIRA, P. M. da, CARVALHO, G. D., STONE, L. F.
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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spelling 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
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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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