Portable chlorophyll meter can estimate the nitrogen sufficiency index and levels of topdressing nitrogen in common bean

Detalhes bibliográficos
Autor(a) principal: Silveira, Pedro Marques da
Data de Publicação: 2017
Outros Autores: Gonzaga, Augusto Cesar de Oliveira
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Pesquisa Agropecuária Tropical (Online)
Texto Completo: https://revistas.ufg.br/pat/article/view/42128
Resumo: 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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spelling Portable chlorophyll meter can estimate the nitrogen sufficiency index and levels of topdressing nitrogen in common beanClorofilômetro portátil pode estimar o índice de suficiência de nitrogênio e os níveis de nitrogênio em cobertura em feijoeiroPhaseolus vulgarisnitrogen fertilizationSPAD-502.Phaseolus vulgarisadubação nitrogenadaSPAD-502.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.O índice de suficiência de nitrogênio (ISN) obtido com o uso de clorofilômetro portátil é uma alternativa prática para avaliar o nível de N em plantas. Objetivou-se determinar o valor adequado do ISN em folhas de feijoeiro comum, para definição da necessidade e quantidade de N a ser aplicado em cobertura, utilizando-se o clorofilômetro portátil Minolta SPAD-502. Foram conduzidos três experimentos de campo, em delineamento de blocos ao acaso, com quatro repetições. Doses de N foram aplicadas em cobertura e comparadas com um tratamento no qual foi aplicada alta dose de N, para ser utilizado como referência no cálculo do ISN, cujo valor foi de 95 %. Com base nos resultados obtidos com o clorofilômetro e o ISN, para cada 0,1 ponto percentual de aumento no ISN para se atingir o nível adequado (95 %), deve-se aplicar 1,1-1,5 kg ha-1 de N em cobertura.Escola de Agronomia - Universidade Federal de Goiás2017-01-20info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAvaliado por paresapplication/pdfhttps://revistas.ufg.br/pat/article/view/42128Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics]; v. 47, n. 1, Jan./Mar. 2017; 1-6Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics); v. 47, n. 1, jan./mar. 2017; 1-6Pesquisa Agropecuária Tropical; v. 47, n. 1, jan./mar. 2017; 1-61983-4063reponame:Pesquisa Agropecuária Tropical (Online)instname:Universidade Federal de Goiás (UFG)instacron:UFGenghttps://revistas.ufg.br/pat/article/view/42128/22006Copyright (c) 2017 Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics)info:eu-repo/semantics/openAccessSilveira, Pedro Marques daGonzaga, Augusto Cesar de Oliveira2020-07-13T18:24:05Zoai:ojs.revistas.ufg.br:article/42128Revistahttps://revistas.ufg.br/patPUBhttps://revistas.ufg.br/pat/oaiaseleguini.pat@gmail.com||mgoes@agro.ufg.br1983-40631517-6398opendoar:2024-05-21T19:56:14.131433Pesquisa Agropecuária Tropical (Online) - Universidade Federal de Goiás (UFG)true
dc.title.none.fl_str_mv Portable chlorophyll meter can estimate the nitrogen sufficiency index and levels of topdressing nitrogen in common bean
Clorofilômetro portátil pode estimar o índice de suficiência de nitrogênio e os níveis de nitrogênio em cobertura em feijoeiro
title Portable chlorophyll meter can estimate the nitrogen sufficiency index and levels of topdressing nitrogen in common bean
spellingShingle Portable chlorophyll meter can estimate the nitrogen sufficiency index and levels of topdressing nitrogen in common bean
Silveira, Pedro Marques da
Phaseolus vulgaris
nitrogen fertilization
SPAD-502.
Phaseolus vulgaris
adubação nitrogenada
SPAD-502.
title_short Portable chlorophyll meter can estimate the nitrogen sufficiency index and levels of topdressing nitrogen in common bean
title_full Portable chlorophyll meter can estimate the nitrogen sufficiency index and levels of topdressing nitrogen in common bean
title_fullStr Portable chlorophyll meter can estimate the nitrogen sufficiency index and levels of topdressing nitrogen in common bean
title_full_unstemmed Portable chlorophyll meter can estimate the nitrogen sufficiency index and levels of topdressing nitrogen in common bean
title_sort Portable chlorophyll meter can estimate the nitrogen sufficiency index and levels of topdressing nitrogen in common bean
author Silveira, Pedro Marques da
author_facet Silveira, Pedro Marques da
Gonzaga, Augusto Cesar de Oliveira
author_role author
author2 Gonzaga, Augusto Cesar de Oliveira
author2_role author
dc.contributor.author.fl_str_mv Silveira, Pedro Marques da
Gonzaga, Augusto Cesar de Oliveira
dc.subject.por.fl_str_mv Phaseolus vulgaris
nitrogen fertilization
SPAD-502.
Phaseolus vulgaris
adubação nitrogenada
SPAD-502.
topic Phaseolus vulgaris
nitrogen fertilization
SPAD-502.
Phaseolus vulgaris
adubação nitrogenada
SPAD-502.
description 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.
publishDate 2017
dc.date.none.fl_str_mv 2017-01-20
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Avaliado por pares
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://revistas.ufg.br/pat/article/view/42128
url https://revistas.ufg.br/pat/article/view/42128
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://revistas.ufg.br/pat/article/view/42128/22006
dc.rights.driver.fl_str_mv Copyright (c) 2017 Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics)
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2017 Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics)
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
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. 47, n. 1, Jan./Mar. 2017; 1-6
Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics); v. 47, n. 1, jan./mar. 2017; 1-6
Pesquisa Agropecuária Tropical; v. 47, n. 1, jan./mar. 2017; 1-6
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_ 1799874819415605248

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