ISHS Acta Horticulturae 418: III International Symposium on Artificial Lighting in Horticulture
EFFECTS OF DIFFERENT LIGHTING STRATEGIES ON THE GROWTH AND DEVELOPMENT OF FICUS BENJAMINA |
| Authors: | E. Beel, P. De Bruyn, F. Frederick, R. Lemeur |
| Keywords: | Lighting strategy, supplementary lighting, Ficus benjamina, growth function, light efficiency, leaf area expansion, ornamental value |
| Abstract:
Seven different lighting strategies along with a control were tested, during winter, for Ficus benjamina plants grown in greenhouses. In five strategies, continuous or intermittent supplementary lighting was applied during the night when the daily radiation integral was less than 3 MJ.m-2. In the other strategies supplementary lighting was applied during the natural day when the irradiance dropped below 35 W.m-2. Plant height was enhanced by increasing the lighting period. Biomass increase and plant quality however were optimal at a lighting period of 16 h day-1. Lighting during the night favoured partioning to non-assimilatory plant components. The different lighting strategies had no effect on the lighting efficiency on leaf area base. | |
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