Canopy chlorophyll fluorescence applied to stress detection using an easy-to-build micro-lidar
LEDFLEX is a micro-lidar dedicated to the measurement of vegetation fluorescence. The light source consists of 4 blue Light-Emitting Diodes (LED) to illuminate part of the canopy in order to average the spatial variability of small crops. The fluorescence emitted in response to a 5-μs width pulse is...
| Autores principales: | , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Springer
2019
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/102367 |
| _version_ | 1855532604378316800 |
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| author | Moya, I. Loayza, H. Llanos, M. Quiróz, R. Ounis, A. Goulas, Y. |
| author_browse | Goulas, Y. Llanos, M. Loayza, H. Moya, I. Ounis, A. Quiróz, R. |
| author_facet | Moya, I. Loayza, H. Llanos, M. Quiróz, R. Ounis, A. Goulas, Y. |
| author_sort | Moya, I. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | LEDFLEX is a micro-lidar dedicated to the measurement of vegetation fluorescence. The light source consists of 4 blue Light-Emitting Diodes (LED) to illuminate part of the canopy in order to average the spatial variability of small crops. The fluorescence emitted in response to a 5-μs width pulse is separated from the ambient light through a synchronized detection. Both the reflectance and the fluorescence of the target are acquired simultaneously in exactly the same field of view, as well as the photosynthetic active radiation and air temperature. The footprint is about 1 m2 at a distance of 8 m. By increasing the number of LEDs longer ranges can be reached. The micro-lidar has been successfully applied under full sunlight conditions to establish the signature of water stress on pea (Pisum Sativum) canopy. Under well-watered conditions the diurnal cycle presents an M shape with a minimum (Fmin) at noon which is Fmin > Fo. After several days withholding watering, Fs decreases and Fmin < Fo. The same patterns were observed on mint (Menta Spicata) and sweet potatoes (Ipomoea batatas) canopies. Active fluorescence measurements with LEDFLEX produced robust fluorescence yield data as a result of the constancy of the excitation intensity and its geometry fixity. Passive methods based on Sun-Induced chlorophyll Fluorescence (SIF) that uses high-resolution spectrometers generate only flux data and are dependent on both the 3D structure of vegetation and variable irradiance conditions along the day. Parallel measurements with LEDFLEX should greatly improve the interpretation of SIF changes. |
| format | Journal Article |
| id | CGSpace102367 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | Springer |
| publisherStr | Springer |
| record_format | dspace |
| spelling | CGSpace1023672025-03-13T09:46:29Z Canopy chlorophyll fluorescence applied to stress detection using an easy-to-build micro-lidar Moya, I. Loayza, H. Llanos, M. Quiróz, R. Ounis, A. Goulas, Y. canopy chlorophyll stress sweet potatoes LEDFLEX is a micro-lidar dedicated to the measurement of vegetation fluorescence. The light source consists of 4 blue Light-Emitting Diodes (LED) to illuminate part of the canopy in order to average the spatial variability of small crops. The fluorescence emitted in response to a 5-μs width pulse is separated from the ambient light through a synchronized detection. Both the reflectance and the fluorescence of the target are acquired simultaneously in exactly the same field of view, as well as the photosynthetic active radiation and air temperature. The footprint is about 1 m2 at a distance of 8 m. By increasing the number of LEDs longer ranges can be reached. The micro-lidar has been successfully applied under full sunlight conditions to establish the signature of water stress on pea (Pisum Sativum) canopy. Under well-watered conditions the diurnal cycle presents an M shape with a minimum (Fmin) at noon which is Fmin > Fo. After several days withholding watering, Fs decreases and Fmin < Fo. The same patterns were observed on mint (Menta Spicata) and sweet potatoes (Ipomoea batatas) canopies. Active fluorescence measurements with LEDFLEX produced robust fluorescence yield data as a result of the constancy of the excitation intensity and its geometry fixity. Passive methods based on Sun-Induced chlorophyll Fluorescence (SIF) that uses high-resolution spectrometers generate only flux data and are dependent on both the 3D structure of vegetation and variable irradiance conditions along the day. Parallel measurements with LEDFLEX should greatly improve the interpretation of SIF changes. 2019-05-25 2019-07-26T16:12:38Z 2019-07-26T16:12:38Z Journal Article https://hdl.handle.net/10568/102367 en Open Access Springer Moya, I.; Loayza, H.; Lopez, M.L.; Quiroz, R.; Ounis, A.; Goulas, Y. 2019. Canopy chlorophyll fluorescence applied to stress detection using an easy-to-build micro-lidar. Photosynthesis Research. ISSN: 1573-5079. First Online 25May2019. 15 p. |
| spellingShingle | canopy chlorophyll stress sweet potatoes Moya, I. Loayza, H. Llanos, M. Quiróz, R. Ounis, A. Goulas, Y. Canopy chlorophyll fluorescence applied to stress detection using an easy-to-build micro-lidar |
| title | Canopy chlorophyll fluorescence applied to stress detection using an easy-to-build micro-lidar |
| title_full | Canopy chlorophyll fluorescence applied to stress detection using an easy-to-build micro-lidar |
| title_fullStr | Canopy chlorophyll fluorescence applied to stress detection using an easy-to-build micro-lidar |
| title_full_unstemmed | Canopy chlorophyll fluorescence applied to stress detection using an easy-to-build micro-lidar |
| title_short | Canopy chlorophyll fluorescence applied to stress detection using an easy-to-build micro-lidar |
| title_sort | canopy chlorophyll fluorescence applied to stress detection using an easy to build micro lidar |
| topic | canopy chlorophyll stress sweet potatoes |
| url | https://hdl.handle.net/10568/102367 |
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