ISHS Acta Horticulturae 51: Symposium on Protected Cultivation of Flowers and Vegetables
TEMPERATURE AND DAYLENGTH REQUIREMENTS OF ALSTROEMERIA |
| Author: | C. Vonk Noordegraaf |
| Abstract:
The number of shoots of the Alstroemeria variety 'Walter Fleming' is influenced by temperature and daylength. In the range of 13° to 25°C the number of shoots increase with the temperature. After a period of 182 days more shoots had been formed at 9°C than at 13° and 17°C. At 13°C the development of shoots stopped nearly completely after 84 days. At 9°C this occurred after 154 days. With different daylengths most shoots were formed at short day, 8 hrs. With increasing daylength, the number of shoots decreased. The percentage of generative shoots decreased when the temperature was raised above 13°C. The number of leaves before flower initiation was lowest at 9°C. With different daylengths the highest percentage of generative shoots was found at 8 + 8 hrs and the lowest number at short day (8 + 0 hrs). The number of nodes decreased with increasing daylength, with the largest decrease between 8 + 0 and 8 + 4 hours. Shoot development and flower initiation are promoted by different conditions. Probably there is an interaction between the two processes, flower initiation inhibiting shoot development. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
