Effect of Cultivar on Chlorophyll Meter and Canopy Reflectance Measurements in Cucumber
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 M...
| Main Authors: | , , , , , |
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| Format: | info:eu-repo/semantics/article |
| Language: | English |
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MDPI
2020
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10835/7673 |
| _version_ | 1789406586641317888 |
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| author | De Souza, Romina Grasso, Rafael Peña Fleitas, María Teresa Gallardo Pino, María Luisa Thompson, Rodney Padilla Ruiz, Francisco Manuel |
| author_facet | De Souza, Romina Grasso, Rafael Peña Fleitas, María Teresa Gallardo Pino, María Luisa Thompson, Rodney Padilla Ruiz, Francisco Manuel |
| author_sort | De Souza, Romina |
| collection | DSpace |
| description | 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 |
| format | info:eu-repo/semantics/article |
| id | oai:repositorio.ual.es:10835-7673 |
| institution | Universidad de Cuenca |
| language | English |
| publishDate | 2020 |
| publisher | MDPI |
| record_format | dspace |
| spelling | oai:repositorio.ual.es:10835-76732023-04-12T18:55:11Z Effect of Cultivar on Chlorophyll Meter and Canopy Reflectance Measurements in Cucumber De Souza, Romina Grasso, Rafael Peña Fleitas, María Teresa Gallardo Pino, María Luisa Thompson, Rodney Padilla Ruiz, Francisco Manuel genotype greenhouse leaf nitrogen proximal optical sensors vegetation index 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 2020-01-20T13:18:32Z 2020-01-20T13:18:32Z 2020-01-16 info:eu-repo/semantics/article 1424-8220 http://hdl.handle.net/10835/7673 en https://www.mdpi.com/1424-8220/20/2/509 Attribution-NonCommercial-NoDerivatives 4.0 Internacional Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess MDPI |
| spellingShingle | genotype greenhouse leaf nitrogen proximal optical sensors vegetation index De Souza, Romina Grasso, Rafael Peña Fleitas, María Teresa Gallardo Pino, María Luisa Thompson, Rodney Padilla Ruiz, Francisco Manuel Effect of Cultivar on Chlorophyll Meter and Canopy Reflectance Measurements in Cucumber |
| 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 | http://hdl.handle.net/10835/7673 |
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