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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
22/02/2017 |
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Data da última atualização: |
04/12/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SILVEIRA, P. M. da; GONZAGA, A. C. de O. |
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Afiliação: |
PEDRO MARQUES DA SILVEIRA, CNPAF; AUGUSTO CESAR DE OLIVEIRA GONZAGA, CNPAF. |
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Título: |
Portable chlorophyll meter can estimate the nitrogen sufficiency index and levels of topdressing nitrogen in common bean. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Tropical, Goiânia, v. 47, n. 1, p. 1-6, jan./mar. 2017. |
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ISSN: |
1983-4063 |
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DOI: |
10.1590/1983-40632016v4742128 |
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Idioma: |
Inglês |
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Conteúdo: |
The nitrogen sufficiency index (NSI) obtained by using a portable chlorophyll meter is a practical alternative to evaluate the N levels in plants. This study aimed at determining the appropriate NSI value for leaves of common bean plants, in order to define the need and amount of N to be applied as topdressing, using the Minolta SPAD-502 portable chlorophyll meter. Three field experiments were conducted using a randomized blocks design, with four replications. Nitrogen doses were applied as topdressing and compared with a treatment in which a high dose of N was used as a reference to calculate the NSI, whose value was 95 %. According to the results observed using the chlorophyll meter and the NSI, for each 0.1 percentage point increase in the NSI to reach the adequate level (95 %), it is necessary to apply 1.1-1.5 kg ha-1 of topdressing N. |
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Palavras-Chave: |
Adubação nitrogenada; SAPD-502. |
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Thesagro: |
Feijão; Fertilizante nitrogenado; Phaseolus vulgaris. |
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Thesaurus Nal: |
Beans; Nitrogen fertilizers. |
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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/156468/1/CNPAF-2017-pat.pdf
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Marc: |
LEADER 01640naa a2200241 a 4500
001 2065238
005 2017-12-04
008 2017 bl uuuu u00u1 u #d
022 $a1983-4063
024 7 $a10.1590/1983-40632016v4742128$2DOI
100 1 $aSILVEIRA, P. M. da
245 $aPortable chlorophyll meter can estimate the nitrogen sufficiency index and levels of topdressing nitrogen in common bean.$h[electronic resource]
260 $c2017
520 $aThe nitrogen sufficiency index (NSI) obtained by using a portable chlorophyll meter is a practical alternative to evaluate the N levels in plants. This study aimed at determining the appropriate NSI value for leaves of common bean plants, in order to define the need and amount of N to be applied as topdressing, using the Minolta SPAD-502 portable chlorophyll meter. Three field experiments were conducted using a randomized blocks design, with four replications. Nitrogen doses were applied as topdressing and compared with a treatment in which a high dose of N was used as a reference to calculate the NSI, whose value was 95 %. According to the results observed using the chlorophyll meter and the NSI, for each 0.1 percentage point increase in the NSI to reach the adequate level (95 %), it is necessary to apply 1.1-1.5 kg ha-1 of topdressing N.
650 $aBeans
650 $aNitrogen fertilizers
650 $aFeijão
650 $aFertilizante nitrogenado
650 $aPhaseolus vulgaris
653 $aAdubação nitrogenada
653 $aSAPD-502
700 1 $aGONZAGA, A. C. de O.
773 $tPesquisa Agropecuária Tropical, Goiânia$gv. 47, n. 1, p. 1-6, jan./mar. 2017.
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Embrapa Arroz e Feijão (CNPAF) |
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