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Effect of Cultivar on Chlorophyll Meter and Canopy Reflectance Measurements in Cucumber
dc.contributor.author | De Souza, Romina | |
dc.contributor.author | Grasso, Rafael | |
dc.contributor.author | Peña Fleitas, María Teresa | |
dc.contributor.author | Gallardo Pino, María Luisa | |
dc.contributor.author | Thompson, Rodney | |
dc.contributor.author | Padilla Ruiz, Francisco Manuel | |
dc.date.accessioned | 2020-01-20T13:18:32Z | |
dc.date.available | 2020-01-20T13:18:32Z | |
dc.date.issued | 2020-01-16 | |
dc.identifier.issn | 1424-8220 | |
dc.identifier.uri | http://hdl.handle.net/10835/7673 | |
dc.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 | es_ES |
dc.language.iso | en | es_ES |
dc.publisher | MDPI | es_ES |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | genotype | es_ES |
dc.subject | greenhouse | es_ES |
dc.subject | leaf nitrogen | es_ES |
dc.subject | proximal optical sensors | es_ES |
dc.subject | vegetation index | es_ES |
dc.title | Effect of Cultivar on Chlorophyll Meter and Canopy Reflectance Measurements in Cucumber | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.relation.publisherversion | https://www.mdpi.com/1424-8220/20/2/509 | es_ES |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es_ES |