ISHS Acta Horticulturae 424: II International Rose Symposium
THE EFFECTS OF HIGH-INTENSITY LIGHTING ON FLOWER YIELD OF ROSE "DALLAS" |
| Authors: | E. Farina, R. Veruggio |
| Abstract:
Four-year old plants of rose "Dallas" were grown at minimum temperature of 12°C with 2000 lux supplementary lighting (total light period of 16 hours / day) from HPS lamps during the period November-February in Sanremo area. Flower yield increased by 18% over yield of control plants. Two-year old plants in the same experimental conditions gave a similar response. In the subsequent year these plants (three-year old) gave a 19% increase of yield under the same lighting treatment in the same cultural conditions of the former year. An increase of quality of the harvested flowers was recorded in each experiment. No further increase of yield was observed when raising the irradiance of supplementary lighting to 3000 lux | |
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