Late spring frost damage is the main factor that limits apricot production in Iran. This research was aimed to evaluate the damage of freezing in two apricot cultivar flowers: ʽʽNasiriʼʼ and ʽʽNori-Dirrasʼʼ during spring 2011. Reproductive organs of these cultivars at two phenological stages، popcorn and full bloom، were transferred to programmable freezer with temperature touch down from 5°C to -10°C. Temperature were detected by the mean of thermocouple and recorded by a data logger connected to a PC Computer. According to the results، differences between two cultivars and interaction of cultivar and phenological stages were not significant، whereas the effect of phenological stage was significant. The lowest supercooling temperature was -6. 1°C and recorded at full bloom stage in ʽʽNori-Dirrasʼʼ. More than 30% of ʽʽNori-Dirrasʼʼ buds and more than 60% of its flowers showed less supercooling than -5°C. According to this result، ʽʽNori-Dirrasʼʼ showed lower supercooling temperature than ʽʽNasiriʼʼ.
Nasiri , Noori , Dirras , spring frost , supercooling
- حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران میشود.
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