Journal article
Effects of heterogeneity within tree crowns on airborne-quantified SIF and the CWSI as indicators of water stress in the context of precision agriculture
C Camino, PJ Zarco-Tejada, V Gonzalez-Dugo
Remote Sensing | MDPI | Published : 2018
DOI: 10.3390/rs10040604
Abstract
This research focused on understanding the effects of structural heterogeneity within tree crowns on the airborne retrieval of solar-induced chlorophyll fluorescence (SIF) and the Crop Water Stress Index (CWSI). We explored the SIF and CWSI variability observed within crowns of trees subjected to different water stress regimes and its effect on the relationships with leaf physiological measurements. High-resolution (20 cm) hyperspectral imagery was acquired to assess fluorescence retrieval from sunlit portions of the tree crowns using the Fraunhofer line depth method, and from entire crowns using automatic object-based tree crown detection methods. We also measured the canopy temperature dis..
View full abstractGrants
Awarded by Spanish Ministry of Science and Education
Awarded by Regional Government of Andalusia, Spain
Funding Acknowledgements
The experiment was carried out in the experimental farm "Alameda del Obispo" belonging to IFAPA. The authors gratefully acknowledge the financial support of the Spanish Ministry of Science and Education for projects AGL2012-40053-C03-01 and AGL2012-35196 and of the Regional Government of Andalusia, Spain, for project P12-AGR-2521. Ignacio Lorite and Elias Fereres are acknowledged for their support to this work. The authors would also like to thank R. Romero, D. Notario, A. Vera, and A. Homero for their technical support during the airborne campaign and the image processing conducted in the QuantaLab-IAS-CSIC laboratory. M. Lopez-Lopez, M. Orgaz, K. Gutidrrez, and R. Luque are also acknowledged for their fieldwork in the almond orchard.