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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
17/01/2020 |
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Data da última atualização: |
13/02/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SANTOS, A. B. dos; SILVA, M. A. S. da; SILVEIRA, P. M. da; CARVALHO, G. D.; STONE, L. F. |
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Afiliação: |
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. |
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Título: |
Nitrogen sufficiency index for estimating nitrogen fertilizer requirement of irrigated rice. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Revista Ceres, v. 66, n. 6, p. 422-430, nov./dez. 2019. |
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ISSN: |
2177-3491 |
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DOI: |
10.1590/0034-737X201966060003 |
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Idioma: |
Inglês |
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Conteúdo: |
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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Palavras-Chave: |
Nitrogen topdressing. |
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Thesagro: |
Arroz Irrigado; Clorofila; Fertilizante Nitrogenado; Nitrogênio; Oryza Sativa. |
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Thesaurus Nal: |
Chlorophyll; Grain yield; Irrigation management; Nitrogen fertilizers; Rice. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/209003/1/CNPAF-2019-rc.pdf
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Marc: |
LEADER 02064naa a2200325 a 4500
001 2118934
005 2020-02-13
008 2019 bl uuuu u00u1 u #d
022 $a2177-3491
024 7 $a10.1590/0034-737X201966060003$2DOI
100 1 $aSANTOS, A. B. dos
245 $aNitrogen sufficiency index for estimating nitrogen fertilizer requirement of irrigated rice.$h[electronic resource]
260 $c2019
520 $aThe 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.
650 $aChlorophyll
650 $aGrain yield
650 $aIrrigation management
650 $aNitrogen fertilizers
650 $aRice
650 $aArroz Irrigado
650 $aClorofila
650 $aFertilizante Nitrogenado
650 $aNitrogênio
650 $aOryza Sativa
653 $aNitrogen topdressing
700 1 $aSILVA, M. A. S. da
700 1 $aSILVEIRA, P. M. da
700 1 $aCARVALHO, G. D.
700 1 $aSTONE, L. F.
773 $tRevista Ceres$gv. 66, n. 6, p. 422-430, nov./dez. 2019.
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Embrapa Arroz e Feijão (CNPAF) |
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