Dornbusch, Tino:
ISBN 9783899596153

Development and application of a three-dimensional architectural model to describe morphological traits of spring barley (Hordeum vulgare L.) stands. Schriftenreihe der Pflanzenbauwissenschaften des Instituts für Agrar- und Ernährungswissenschaften, Martin-Luther-Universität Halle-Wittenberg, Bd. 2 # Pb., 146 S., 41 Abb., davon 2 in Farbe, 16 Tab.

SCHLAGWORTE:
plant architecture
virtual plants
barley
3D model
Matlab
image processing
eaf angle distribution
leaf orientation

Combining process-based and three-dimensional (3D) structural models for specific crops to functional-structural plant models (FSPMs) enables ecophysiologists to investigate the interaction of single plants or plant stands with their biotic and abiotic environment in a unique way. The present study was part of a collaborative research program on the development of an FSPM for the sample plant spring barley (Hordeum vulgare L.). Key points of the dissertation are summarized below.
To begin with, an architectural plant model is developed, which describes the morphology of spring barley plants. Its key feature is a set of equations implemented in self-written Matlab® computer programs to calculate the surface shape of vegetative and generative plant organs. Next, a parameterization of the architectural model is proposed. As the key part of the model parameterization these measured parameters are aggregated and described as functions of organ age and relative phytomer number, whenever possible. These relationships are explored and possible functions capable to describe them introduced.
In the following the emphasis is put on a new approach to parameterize the architectural model based on 3D point cloud data obtained by digitization of entire plants. Since no automated technique is available to process 3D point clouds in a way appropriate for a parameterization of the architectural model, the required algorithms are developed and implemented in Matlab®. Lastly, an application of the architectural model is demonstrated, namely the investigation of the impact of the twisting of spring barley leaf blades on leaf angle (azimuth and inclination angle) distribution.

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