Global warming and breaking dormancy in apricot: some interesting related aspects
The temperate fruit trees (apricots, peaches, etc.), need cold to break the winter endo dormancy. According to the forecast of Intergovernmental Panel on the Climatic Change (IPPC), in the next 30 years there will be an increase in the average temperatures on the planet of the order of 2°C. This will negatively affect mainly to the areas of mild winter where the chilling requirements of temperate fruit trees are barely covered. An analysis of the consequences of this increase in temperature on the ability to accumulate cold to satisfy the chilling requirements of fruit trees in a warm area of southern Spain (Archena, Murcia 38°07'N, 1°18'W) and altitude 102m, has shown that this increase will cause a reduction of chill accumulation that will reach 30% in the period November 1st -February 15th which is usually taken into account in the studies on winter rest. It will also create difficulties for maintaining the very early ripening apricot production to which it is currently dedicated. This significant reduction of chill accumulation will require in the future, release and cultivate new lower chilling requiring cultivars as well as improve the chemical methods to break dormancy.
Egea, J., López-Alcolea, J., Campoy, J.A., Egea, J.A. and Ruiz, D. (2020). Global warming and breaking dormancy in apricot: some interesting related aspects. Acta Hortic. 1290, 213-216
Prunus armeniaca L., climate change, dormancy, chill accumulation, chilling requirements