Portable chlorophyll meter can estimate the nitrogen sufficiency index and levels of topdressing nitrogen in common bean.
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...
| Autores: | ; |
|---|---|
| Tipo de documento: | Artículo |
| Estado: | Published version |
| Fecha de publicación: | 2017 |
| País: | Brasil |
| Institución: | EMBRAPA |
| Repositorio: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
| Lenguaje: | Inglés |
| OAI Identifier: | oai:www.alice.cnptia.embrapa.br:doc/1065238 |
| Acceso en línea: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/1065238 |
| Nivel de acceso: | Acceso abierto |
| Palabra clave: | Adubação nitrogenada SAPD-502 Feijão Phaseolus vulgaris Fertilizante nitrogenado Beans Nitrogen fertilizers |
| _version_ | 1878767958622208000 |
|---|---|
| author | SILVEIRA, P. M. da |
| author2 | GONZAGA, A. C. de O. |
| author2_role | author |
| author_browse | GONZAGA, A. C. de O. SILVEIRA, P. M. da |
| author_facet | SILVEIRA, P. M. da GONZAGA, A. C. de O. |
| author_role | author |
| collection | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
| 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. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | BR_f9ad0d734fcd99eb1003a39d6a2d8da3 |
| institution | EMBRAPA |
| instname_str | Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
| language | eng |
| network_acronym_str | BR |
| network_name_str | Brasil |
| oai_identifier_str | oai:www.alice.cnptia.embrapa.br:doc/1065238 |
| publishDate | 2017 |
| publishDateSort | 2017 |
| reponame_str | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
| spelling | Portable chlorophyll meter can estimate the nitrogen sufficiency index and levels of topdressing nitrogen in common bean. SILVEIRA, P. M. da GONZAGA, A. C. de O. Adubação nitrogenada SAPD-502 Feijão Phaseolus vulgaris Fertilizante nitrogenado Beans Nitrogen fertilizers 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. Pesquisa Agropecuária Tropical, Goiânia, v. 47, n. 1, p. 1-6, jan./mar. 2017. 1983-4063 http://www.alice.cnptia.embrapa.br/alice/handle/doc/1065238 10.1590/1983-40632016v4742128 |
| spellingShingle | Portable chlorophyll meter can estimate the nitrogen sufficiency index and levels of topdressing nitrogen in common bean. SILVEIRA, P. M. da Adubação nitrogenada SAPD-502 Feijão Phaseolus vulgaris Fertilizante nitrogenado Beans Nitrogen fertilizers |
| status_str | publishedVersion |
| title | 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_short | 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. |
| topic | Adubação nitrogenada SAPD-502 Feijão Phaseolus vulgaris Fertilizante nitrogenado Beans Nitrogen fertilizers |
| topic_facet | Adubação nitrogenada SAPD-502 Feijão Phaseolus vulgaris Fertilizante nitrogenado Beans Nitrogen fertilizers |
| url | http://www.alice.cnptia.embrapa.br/alice/handle/doc/1065238 |