ISHS Acta Horticulturae 505: VII International Symposium on Rubus and Ribes
THE EFFECT OF TEMPERATURE ON THE VEGETATIVE GROWTH AND REPRODUCTIVE DEVELOPMENT OF THE PRIMOCANE FRUITING RASPBERRY ‘AUTUMN BLISS’ |
| Authors: | J. Carew, P. Hadley, N. Battey, J. Darby |
| Keywords: | Rubus idaeus, modelling, effective temperature, flowering, crop prediction |
| Abstract:
An experiment was carried out under semi-controlled environmental conditions to determine the effect of temperature on the rate of vegetative and reproductive development in the primocane fruiting raspberry ‘Autumn Bliss’. Plants were grown in 5 glasshouse compartments with heating set point temperatures of 10, 14, 18, 22, 26 °C and venting set points 4 °C higher under a 16 hour daylength. Vegetative and reproductive development were recorded weekly. The rate of node production was highly temperature dependent increasing to an optimum temperature of 22 °C and declining thereafter. The rate of progress to first pick increased with temperature to an optimum temperature of 22.4 °C and also declined at temperatures above this. Further analysis indicated that first pick occurred after the accumulation of 2300 Ced (effective day degree) above a base temperature of 1.7 °C. The use of these data to develop a predictive model for the time of fruiting of ‘Autumn Bliss’ is discussed. | |
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