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http://dx.doi.org/10.5532/KJAFM.2019.21.1.55

Estimation of freeze damage risk according to developmental stage of fruit flower buds in spring  

Kim, Jin-Hee (National Center for Agro-Meteorology, Seoul National University)
Kim, Dae-jun (National Center for Agro-Meteorology, Seoul National University)
Kim, Soo-ock (National Center for Agro-Meteorology, Seoul National University)
Yun, Eun-jeong (National Center for Agro-Meteorology, Seoul National University)
Ju, Okjung (Environmental Agriculture Research Division, Gyeonggido Agricultural Research and Extension Services)
Park, Jong Sun (R&D Center, EPINET Co. Ltd.)
Shin, Yong Soon (R&D Center, EPINET Co. Ltd.)
Publication Information
Korean Journal of Agricultural and Forest Meteorology / v.21, no.1, 2019 , pp. 55-64 More about this Journal
Abstract
The flowering seasons can be advanced due to climate change that would cause an abnormally warm winter. Such warm winter would increase the frequency of crop damages resulted from sudden occurrences of low temperature before and after the vegetative growth stages, e.g., the period from germination to flowering. The degree and pattern of freezing damage would differ by the development stage of each individual fruit tree even in an orchard. A critical temperature, e.g., killing temperature, has been used to predict freeze damage by low-temperature conditions under the assumption that such damage would be associated with the development stage of a fruit flower bud. However, it would be challenging to apply the critical temperature to a region where spatial variation in temperature would be considerably high. In the present study, a phenological model was used to estimate major bud development stages, which would be useful for prediction of regional risks for the freeze damages. We also derived a linear function to calculate a probabilistic freeze risk in spring, which can quantitatively evaluate the risk level based solely on forecasted weather data. We calculated the dates of freeze damage occurrences and spatial risk distribution according to main production areas by applying the spring freeze risk function to apple, peach, and pear crops in 2018. It was predicted that the most extensive low-temperature associated freeze damage could have occurred on April 8. It was also found that the risk function was useful to identify the main production areas where the greatest damage to a given crop could occur. These results suggest that the freezing damage associated with the occurrence of low-temperature events could decrease providing early warning for growers to respond abnormal weather conditions for their farm.
Keywords
Fruit tree; Flower bud; Spring freeze damage; Abnormal weather;
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Times Cited By KSCI : 5  (Citation Analysis)
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