evaluation or supercooling temperatures in apricot flowers
نویسندگان
چکیده
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 cultivarflowers: ʽʽnasiriʼʼ and ʽʽnori-dirrasʼʼ during spring 2011. reproductive organs of thesecultivars at two phenological stages, popcorn and full bloom, were transferred toprogrammable freezer with temperature touch down from 5°c to -10°c. temperaturewere detected by the mean of thermocouple and recorded by a data logger connected toa pc computer. according to the results, differences between two cultivars andinteraction of cultivar and phenological stages were not significant, whereas the effectof phenological stage was significant. the lowest supercooling temperature was -6.1°cand recorded at full bloom stage in ʽʽnori-dirrasʼʼ. more than 30% of ʽʽnori-dirrasʼʼbuds and more than 60% of its flowers showed less supercooling than -5°c. accordingto this result, ʽʽnori-dirrasʼʼ showed lower supercooling temperature than ʽʽnasiriʼʼ.
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عنوان ژورنال:
علوم باغبانی ایرانجلد ۴۵، شماره ۱، صفحات ۳۵-۴۳
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