ISHS Acta Horticulturae 313: III International Symposium on Computer Modelling in Fruit Research and Orchard Management
COMPUTER SIMULATION OF RADIATION INTERCEPTION AND PHOTOSYNTHESIS FOR KIWIFRUIT CANOPIES IN THE FIELD |
| Authors: | J.P. Curtis, J.G. Buwalda |
| Abstract:
A simulation model was developed for calculating radiation interception and photosynthesis for a plant canopy. The model can use any surface shape, including a simple cylinder or a complex canopy surface defined by field measurements. The surface is drawn on the computer screen using three-dimensional graphics routines, and coloured according to the incident radiation at each part of the canopy. Given the latitude and day of the year, the solar position can be calculated for each time of the day and the vine redrawn according to the new position of the radiation source. Radiation intensities measured with a horizontally-inclined sensor are used to estimate the intensity of the radiation source. Leaf area indices can be entered and mapped onto the surface, allowing radiation attenuation and hence photosynthesis at each position to be calculated. Canopy photosynthesis is estimated as the spatial integral of these calculated rates. This model is being used to examine photosynthetic production for kiwifruit canopies trained on different trellis shapes and with different distributions of total leaf area. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
