Journal article

The Photochemical Reflectance Index (PRI) as a Water Stress Indicator in Peach Orchards from Remote Sensing Imagery

L Suarez, PJ Zarco-Tejada, V Gonzalez-Dugo, JAJ Berni, E Fereres, J Girona (ed.), J Marsal (ed.)

VII INTERNATIONAL PEACH SYMPOSIUM | INT SOC HORTICULTURAL SCIENCE | Published : 2012

Abstract

Early detection of water stress is important to avoid the risk of yield losses in commercial orchards. Pre-visual assessment of water stress has been successfully achieved in the major herbaceous crops since the late seventies with remote sensing using thermal infrared radiation. Much more recently, the Photochemical Reflectance Index (PRI), function of xanthophyll pigment absorption, has been proposed for short-term stress detection. However, the assessment of vegetation stress with the PRI cannot be properly conducted without considering leaf and canopy structural effects on the spectral index. This is because reflectance from bands at 531 and 570 nm is affected by both leaf and canopy par..

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University of Melbourne Researchers