ISHS Acta Horticulturae 405: VI International Symposium on Postharvest Physiology of Ornamental Plants
HIGH AIR HUMIDITY REDUCES THE KEEPING QUALITY OF CUT ROSES |
| Authors: | Leiv M. Mortensen, T. Fjeld |
| Abstract:
Two rose cultivars were grown at four levels of air humidity (65, 75, 85 and 90% RH) at 19°C in growth chambers. Small effects were found by RH on shoot length and shoot fresh weight. Increasing the humidity from 65 to 85% had no effect on the vase life of the roses, while a further increase to 90% significantly decreased it. High humidity during the last three weeks of the growth period was more important than high humidity during the first three weeks. This decrease in vase life was closely related to an increase in the occurrence of bent necks and leaf drying at the highest humidity. Measurements of the water loss from detached leaves showed significantly higher values in leaves produced at 90% RH than in leaves produced at the other humidities. | |
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