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| Van der Heijden, G.W.A.M.; De Visser, P.H.B.; Heuvelink, E.. |
| The aim of this chapter is to give an overview of the measurements needed for development and parameterization of a functional-structural crop model. Special emphasis will be given to measurements for structural/architectural processes. Size (area, length, width, thickness, volume) of the various organs (e.g., leaves, internodes, flowers, fruits and roots), as well as number of organs, 3D position and time of measurement need to be recorded. Existing methods for full 3D data capture and automatic feature extraction still present many problems. Therefore, human-operated sonic or magnetic trackers are at the moment more suitable to extract and store relevant information. Physiological processes like photosynthesis, transpiration and carbon allocation require... |
| Tipo: Conference proceedings |
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| Ano: 2007 |
URL: http://library.wur.nl/ojs/index.php/frontis/article/view/1368 |
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| De Visser, P.H.B.; Van der Heijden, G.W.A.M.; Heuvelink, E.; Carvalho, S.M.P.. |
| An integration of structural and physiological models is used to simulate 3D plant growth and visual appearance of cut chrysanthemum, reacting to environmental factors. Measurements to calibrate the model include 3D data of digitized plants as well as a number of measurements and observations on harvested plants, including biomass per organ. The structural module is based on the L-systems algorithm. This L-system calculates temperature- and light-driven development, branching pattern and flower formation. In this 3D-structural model existing rules for physiological processes are incorporated, enabling calculation of carbon dynamics. A 3D radiosity method is used to calculate light absorption of every organ (leaf) at an hourly basis. Hourly photosynthesis... |
| Tipo: Conference proceedings |
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| Ano: 2007 |
URL: http://library.wur.nl/ojs/index.php/frontis/article/view/1383 |
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