ISHS Acta Horticulturae 707: VII International Symposium on Modelling in Fruit Research and Orchard Management
A DEVELOPMENTAL RATE MODEL TO SIMULATE THE ENDODORMANCY COMPLETION IN FLOWER BUDS OF ‘SATONISHIKI’ SWEET CHERRY |
| Authors: | T. Sugiura, H. Sugiura, H. Honjo |
| Keywords: | Prunus avium, model, Chill Unit, developmental rate, developmental stage, DVR, DVI |
| Abstract:
Temperature dependences of endodormancy completion in flower buds of ‘Satonishiki’ sweet cherry (Prunus avium L.) trees were investigated and a model for estimating the time of endodormancy completion was developed. Potted trees were chilled in chambers adjusted to various temperatures for various durations in each experiment. Chilling for 1200 hours at 3°C was necessary to complete endodormancy. The chilling at 0°C and 6°C needed 1300 hours to complete endodormancy. The chilling at 9°C needed 1450 hours and at 12°C needed 1700 hours. While at 15°C and -6°C the endodormancy was not completed. Chilling at -3°C was not as effective on the endodormancy completion as 6°C. To estimate the date of endodormancy completion in the orchard, a rate (DVR) model describing the relationship between the endodormancy release rate and the temperature was developed using these results. Endodormancy completion dates in the open field were estimated by applying observed hourly temperatures to the model. The estimated dates agreed well with the dates in the open field determined by the forcing experiment. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
