Details
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the IIIrd International Symposium on Models for Plant Grwoth, Environmental Control and Farm Management in Protected Cultivation (Hortimodel2006) |
| Publisher | International Society for Horticultural Science |
| Pages | 75-79 |
| Number of pages | 5 |
| ISBN (print) | 9066056096, 9789066056091 |
| Publication status | Published - Oct 2006 |
Publication series
| Name | Acta Horticulturae |
|---|---|
| Volume | 718 |
| ISSN (Print) | 0567-7572 |
Abstract
In cucumber with its distinct row structure, leaf area and light are unevenly distributed in space. The aim of this work is to conceptualise a radiation transfer model and to describe the set up of the related experiments. The parametersation of the radiation transfer model will be done based on static structural models of cucumber plants obtained from digitalisation. To analyse the radiation transfer for each leaf, the sunlit and shaded areas and the corresponding light intensities on them will be calculated as functions of sun position, incoming light, plant and canopy architecture. To distinguish sunlit and shaded leaf area a projection algorithm will be used to get a measure for the fraction of sunlit leaf area. The intensity of direct light on the sunlit leaf area will be calculated by the incoming PAR intensity depending on the angle between irradiance vector and area normal. PAR intensity on shaded leaf parts (diffuse light) will be calculated based on the approach of Monsi & Saeki. Input parameters will be leaf area index, leaf optical properties of the surrounding leaves and empirical factors describing plant distribution. Output variables of the radiation transfer model will be the sunlit and shaded areas of each leaf with the corresponding light intensities. Future versions of the of radiation transfer model will need to be coupled with functional models of photosynthesis and assimilate allocation. A further step will be to link the model with a dynamic structural model of cucumber plant growth to obtain a functional-structural plant model of cucumber on organ basis. Such models allow improving the understanding of relationships between plant architecture and plant growth and may help to identify optimised plant manipulations regimes.
Keywords
- 3D canopy architecture, Canopy light interception, Crop modelling, Cucumber, Radiation transfer
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Horticulture
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Proceedings of the IIIrd International Symposium on Models for Plant Grwoth, Environmental Control and Farm Management in Protected Cultivation (Hortimodel2006). International Society for Horticultural Science, 2006. p. 75-79 (Acta Horticulturae; Vol. 718).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - A method to analyse the radiation transfer within a greenhouse cucumber canopy (Cucumis sativus L.)
AU - Wiechers, Dirk
AU - Kahlen, Katrin
AU - Stützel, Hartmut
PY - 2006/10
Y1 - 2006/10
N2 - In cucumber with its distinct row structure, leaf area and light are unevenly distributed in space. The aim of this work is to conceptualise a radiation transfer model and to describe the set up of the related experiments. The parametersation of the radiation transfer model will be done based on static structural models of cucumber plants obtained from digitalisation. To analyse the radiation transfer for each leaf, the sunlit and shaded areas and the corresponding light intensities on them will be calculated as functions of sun position, incoming light, plant and canopy architecture. To distinguish sunlit and shaded leaf area a projection algorithm will be used to get a measure for the fraction of sunlit leaf area. The intensity of direct light on the sunlit leaf area will be calculated by the incoming PAR intensity depending on the angle between irradiance vector and area normal. PAR intensity on shaded leaf parts (diffuse light) will be calculated based on the approach of Monsi & Saeki. Input parameters will be leaf area index, leaf optical properties of the surrounding leaves and empirical factors describing plant distribution. Output variables of the radiation transfer model will be the sunlit and shaded areas of each leaf with the corresponding light intensities. Future versions of the of radiation transfer model will need to be coupled with functional models of photosynthesis and assimilate allocation. A further step will be to link the model with a dynamic structural model of cucumber plant growth to obtain a functional-structural plant model of cucumber on organ basis. Such models allow improving the understanding of relationships between plant architecture and plant growth and may help to identify optimised plant manipulations regimes.
AB - In cucumber with its distinct row structure, leaf area and light are unevenly distributed in space. The aim of this work is to conceptualise a radiation transfer model and to describe the set up of the related experiments. The parametersation of the radiation transfer model will be done based on static structural models of cucumber plants obtained from digitalisation. To analyse the radiation transfer for each leaf, the sunlit and shaded areas and the corresponding light intensities on them will be calculated as functions of sun position, incoming light, plant and canopy architecture. To distinguish sunlit and shaded leaf area a projection algorithm will be used to get a measure for the fraction of sunlit leaf area. The intensity of direct light on the sunlit leaf area will be calculated by the incoming PAR intensity depending on the angle between irradiance vector and area normal. PAR intensity on shaded leaf parts (diffuse light) will be calculated based on the approach of Monsi & Saeki. Input parameters will be leaf area index, leaf optical properties of the surrounding leaves and empirical factors describing plant distribution. Output variables of the radiation transfer model will be the sunlit and shaded areas of each leaf with the corresponding light intensities. Future versions of the of radiation transfer model will need to be coupled with functional models of photosynthesis and assimilate allocation. A further step will be to link the model with a dynamic structural model of cucumber plant growth to obtain a functional-structural plant model of cucumber on organ basis. Such models allow improving the understanding of relationships between plant architecture and plant growth and may help to identify optimised plant manipulations regimes.
KW - 3D canopy architecture
KW - Canopy light interception
KW - Crop modelling
KW - Cucumber
KW - Radiation transfer
UR - http://www.scopus.com/inward/record.url?scp=37849185369&partnerID=8YFLogxK
U2 - 10.17660/actahortic.2006.718.7
DO - 10.17660/actahortic.2006.718.7
M3 - Conference contribution
AN - SCOPUS:37849185369
SN - 9066056096
SN - 9789066056091
T3 - Acta Horticulturae
SP - 75
EP - 79
BT - Proceedings of the IIIrd International Symposium on Models for Plant Grwoth, Environmental Control and Farm Management in Protected Cultivation (Hortimodel2006)
PB - International Society for Horticultural Science
ER -