ISHS Acta Horticulturae 148: III International Symposium on Energy in Protected Cultivation
LIGHT INTERCEPTION OF A CUCUMBER CROP AT DIFFERENT STAGES OF GROWTH |
| Author: | E.M. Nederhoff |
| Abstract:
The distribution of the received light in a greenhouse cucumber crop is studied. The light interception on several heights in the crop was measured and expressed as percentage of the outside irradiance. A correction was made for the light interception by the greenhouse construction. For the measurements in the crop a special type of long light meters was used. Measurements were done under diffuse light conditions only. At direct sunlight some estimations with a simple measuring staff were made. During the growing season, an increase of the light interception was evident and a relation with the LAI was found. From the data an extinction coefficient was calculated. A start was made to compare the measure results with results of a calculation model. | |
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