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Survying phenology changes of Ulmus minor Millerby twomethods named discriptive and Quantitative
Survying phenology changes of Ulmus minor Millerby
twomethods named discriptive and Quantitative
Abstract:
Quantitative investigation of phenology, through recording colours of different
parts of plants can be a complement for descriptive method in determining exact
appearance of the phenomena. In this study, the phenological characteristics of Ulmus
minor Miller have been identified using two different methods namely descriptive and
analytical digital photography. In total, ten trees in the campus of Isfahan University
of Technology have been fortnightlymonitored for two years. The time of
phonological phenomenon of each tree was registered in information forms, and
different parts of the tree were photographed with a digital camera. The spectral
spectrum of the leaf and fruit of the tree were produced and the colours were analyzed
in RGB system, with radiometric resolution of 28
for each colour. By determining the
proportion of each primary colour, tint was calculated, which can be easily
interpreted.According to the descriptive observations the flowering and leafing occurs
inthe end of March. In colour changing diagrams the intersection of green channel
with red in late October exhibits a revolution in leaves colour.
Keywords: Phenology, discriptive method, Quantitative method, Ulmus
Conference Papers
Month/Season:
Summer
Year:
2012
File:
