Effect of cultivar on chlorophyll meter and canopy reflectance measurements in cucumber.
ABSTRACT.Optical sensors can be used to assess crop N status to assist with N fertilizer management. Differences between cultivars may affect optical sensor measurement. Cultivar effects on measurements made with the SPAD-502 (Soil Plant Analysis Development) meter and the MC-100 (Chlorophyll Concen...
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2020
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| _version_ | 1868890209564753920 |
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| author | DE SOUZA, R. |
| author2 | GRASSO, R. PEÑA-FLEITAS, M.T. GALLARDO, M. THOMPSON, R.B. PADILLA, F.M. |
| author2_role | author author author author author |
| author_browse | DE SOUZA, R. GALLARDO, M. GRASSO, R. PADILLA, F.M. PEÑA-FLEITAS, M.T. THOMPSON, R.B. |
| author_facet | DE SOUZA, R. GRASSO, R. PEÑA-FLEITAS, M.T. GALLARDO, M. THOMPSON, R.B. PADILLA, F.M. |
| author_role | author |
| collection | AINFO |
| dc.creator.none.fl_str_mv | DE SOUZA, R. GRASSO, R. PEÑA-FLEITAS, M.T. GALLARDO, M. THOMPSON, R.B. PADILLA, F.M. |
| dc.date.none.fl_str_mv | 2020 2025-06-23T18:19:18Z 2025-06-23T18:19:18Z 2025-06-23T18:19:18Z |
| dc.identifier.none.fl_str_mv | https://ainfo.inia.uy/consulta/busca?b=pc&id=60764&biblioteca=vazio&busca=60764&qFacets=60764 |
| dc.language.none.fl_str_mv | en eng |
| dc.rights.none.fl_str_mv | info:eu-repo/semantics/openAccess Acceso abierto |
| dc.source.none.fl_str_mv | reponame:AINFO instname:Instituto Nacional de Investigación Agropecuaria instacron:Instituto Nacional de Investigación Agropecuaria |
| dc.subject.none.fl_str_mv | Genotype Greenhouse Leaf nitrogen Proximal optical sensors Vegetation index |
| dc.title.none.fl_str_mv | Effect of cultivar on chlorophyll meter and canopy reflectance measurements in cucumber. |
| dc.type.none.fl_str_mv | Article PublishedVersion info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
| description | ABSTRACT.Optical sensors can be used to assess crop N status to assist with N fertilizer management. Differences between cultivars may affect optical sensor measurement. Cultivar effects on measurements made with the SPAD-502 (Soil Plant Analysis Development) meter and the MC-100 (Chlorophyll Concentration Meter), and of several vegetation indices measured with the Crop Circle ACS470 canopy reflectance sensor, were assessed. A cucumber (Cucumis sativus L.) crop was grown in a greenhouse, with three cultivars. Each cultivar received three N treatments, of increasing N concentration, being deficient (N1), sufficient (N2) and excessive (N3). There were significant differences between cultivars in the measurements made with both chlorophyll meters, particularly when N supply was sufficient and excessive (N2 and N3 treatments, respectively). There were no consistent differences between cultivars in vegetation indices. Optical sensor measurements were strongly linearly related to leaf N content in each of the three cultivars. The lack of a consistent effect of cultivar on the relationship with leaf N content suggests that a unique equation to estimate leaf N content from vegetation indices can be applied to all three cultivars. Results of chlorophyll meter measurements suggest that care should be taken when using sufficiency values, determined for a particular cultivar. © 2020 by the authors. Licensee MDPI, Basel, Switzerland. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | anni_dd66e9bd626532bc35e199bc0ce1b3ec |
| instacron_str | Instituto Nacional de Investigación Agropecuaria |
| institution | Instituto Nacional de Investigación Agropecuaria |
| instname_str | Instituto Nacional de Investigación Agropecuaria |
| language | eng |
| language_invalid_str_mv | en |
| network_acronym_str | anni |
| network_name_str | oai-lr-anni |
| oai_identifier_str | oai:redi.anii.org.uy:20.500.12381/4073 |
| publishDate | 2020 |
| publishDateSort | 2020 |
| reponame_str | AINFO |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | Acceso abierto |
| spelling | Effect of cultivar on chlorophyll meter and canopy reflectance measurements in cucumber.DE SOUZA, R.GRASSO, R.PEÑA-FLEITAS, M.T.GALLARDO, M.THOMPSON, R.B.PADILLA, F.M.GenotypeGreenhouseLeaf nitrogenProximal optical sensorsVegetation indexABSTRACT.Optical sensors can be used to assess crop N status to assist with N fertilizer management. Differences between cultivars may affect optical sensor measurement. Cultivar effects on measurements made with the SPAD-502 (Soil Plant Analysis Development) meter and the MC-100 (Chlorophyll Concentration Meter), and of several vegetation indices measured with the Crop Circle ACS470 canopy reflectance sensor, were assessed. A cucumber (Cucumis sativus L.) crop was grown in a greenhouse, with three cultivars. Each cultivar received three N treatments, of increasing N concentration, being deficient (N1), sufficient (N2) and excessive (N3). There were significant differences between cultivars in the measurements made with both chlorophyll meters, particularly when N supply was sufficient and excessive (N2 and N3 treatments, respectively). There were no consistent differences between cultivars in vegetation indices. Optical sensor measurements were strongly linearly related to leaf N content in each of the three cultivars. The lack of a consistent effect of cultivar on the relationship with leaf N content suggests that a unique equation to estimate leaf N content from vegetation indices can be applied to all three cultivars. Results of chlorophyll meter measurements suggest that care should be taken when using sufficiency values, determined for a particular cultivar. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.2025-06-23T18:19:18Z2025-06-23T18:19:18Z20202025-06-23T18:19:18ZArticlePublishedVersioninfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttps://ainfo.inia.uy/consulta/busca?b=pc&id=60764&biblioteca=vazio&busca=60764&qFacets=60764reponame:AINFOinstname:Instituto Nacional de Investigación Agropecuariainstacron:Instituto Nacional de Investigación Agropecuariaenenginfo:eu-repo/semantics/openAccessAcceso abiertooai:redi.anii.org.uy:20.500.12381/40732026-02-10T17:37:58Z |
| spellingShingle | Effect of cultivar on chlorophyll meter and canopy reflectance measurements in cucumber. DE SOUZA, R. Genotype Greenhouse Leaf nitrogen Proximal optical sensors Vegetation index |
| status_str | publishedVersion |
| title | Effect of cultivar on chlorophyll meter and canopy reflectance measurements in cucumber. |
| title_full | Effect of cultivar on chlorophyll meter and canopy reflectance measurements in cucumber. |
| title_fullStr | Effect of cultivar on chlorophyll meter and canopy reflectance measurements in cucumber. |
| title_full_unstemmed | Effect of cultivar on chlorophyll meter and canopy reflectance measurements in cucumber. |
| title_short | Effect of cultivar on chlorophyll meter and canopy reflectance measurements in cucumber. |
| title_sort | Effect of cultivar on chlorophyll meter and canopy reflectance measurements in cucumber. |
| topic | Genotype Greenhouse Leaf nitrogen Proximal optical sensors Vegetation index |
| url | https://ainfo.inia.uy/consulta/busca?b=pc&id=60764&biblioteca=vazio&busca=60764&qFacets=60764 |