Journal article

Evaluating the performance of xanthophyll, chlorophyll and structure-sensitive spectral indices to detect water stress in five fruit tree species

C Ballester, PJ Zarco-Tejada, E Nicolas, JJ Alarcon, E Fereres, DS Intrigliolo, V Gonzalez-Dugo

PRECISION AGRICULTURE | SPRINGER | Published : 2018

Abstract

This study assessed the capability of several xanthophyll, chlorophyll and structure-sensitive spectral indices to detect water stress in a commercial farm consisting of five fruit tree crop species with contrasting phenology and canopy architecture. Plots irrigated and non-irrigated for eight days of each species were used to promote a range of plant water status. Multi-spectral and thermal images were acquired from an unmanned aerial system while concomitant measurements of stomatal conductance (gₛ), stem water potential (Ψₛ) and photosynthesis were taken. The Normalized Difference Vegetation Index (NDVI), red-edge ratio (R₇₀₀/R₆₇₀), Transformed Chlorophyll Absorption in Reflectance Index ..

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University of Melbourne Researchers

Grants

Awarded by Spanish Ministry of Science and Innovation


Awarded by European Union through Project IRRIQUAL


Awarded by European Union through Project SIRRIMED


Awarded by SENECA


Awarded by SENECA-Excelencia Cientifica


Funding Acknowledgements

Authors acknowledge K. Gutierrez, D. Notario, P.A Nortes, M.A. Jimenez-Bello and A. Vera for their technical support. This work was funded by the Spanish Ministry of Science and Innovation for the Projects CONSOLIDER CSD2006-0067, AGL2009-13105, AGL2010-17553 and AGL2013-49047-C2-2-R and the European Union through Projects Interreg SUDOE IVB "Telerieg'', IRRIQUAL (EU-FP6-FOOD-CT-2006-023120) and SIRRIMED (KBBE-2009-1-2-03, Proposal No. 245159). We are also grateful to two SENECA Projects (05665/PI/07 and 11872/PI/09) and SENECA-Excelencia Cientifica (19903/GERM/15), for providing funds to finance this research.