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Open Access Green as soon as Postprint is submitted to ZB.
Reflectance at the red edge as a sensitive indicator of the damage of trees and its correlation to the state of the photosynthetic system.
Proc. SPIE 1521, 131-142 (1991)
From the reflectance spectra R(λ), the absolute value R710 at 710 nm, the ratios G/R = R560/R660 and IR/R = R760/R660, the position λre of the inflection point at the red edge, and the chromaticity point are derived. The photosynthetic system (PS) is characterized by the fluorescence induction kinetics which provides the parameters Rfd and Vo for the estimate of the potential photosynthetic capacity and the chlorophyll concentration, respectively. Measurements obtained from spruce, birch, oak, and poplar of different damage class and color show correlations between the reflectance- and fluorescence-characteristics. The chromaticity points provide a two-dimensional analysis which may improve the separation between affected and healthy trees.
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Publication type
Article: Journal article
Document type
Scientific Article
ISSN (print) / ISBN
0277-786X
e-ISSN
1996-756X
Journal
Proceedings of SPIE
Quellenangaben
Volume: 1521,
Pages: 131-142
Publisher
SPIE
Reviewing status
Peer reviewed