Regional Distribution of Peach Freezing Damage and Chilling Days in 2010 in Gangwon Province
2010
Seo, Y.H., Gangwon Agricultural Research and Extension Services, Chunchon, Republic of Korea | Park, Y.S., Gangwon Agricultural Research and Extension Services, Chunchon, Republic of Korea | Cho, B.O., Gangwon Agricultural Research and Extension Services, Chunchon, Republic of Korea | Kang, A.S., Gangwon Agricultural Research and Extension Services, Chunchon, Republic of Korea | Jeong, B.C., Gangwon Agricultural Research and Extension Services, Chunchon, Republic of Korea | Jung, Y.S., Kangwon National University, Chuncheon, Republic of Korea
Extremely low values of the daily minimum temperature occurred in January 2010, ranging from -18 to -29℃ at various locations growing peach trees in the Gangwon province. Due to the extreme cold temperature during the winter dormancy period of peach trees, the growth of the peach trees was damaged and the damaged areas increased as the extent of 17 to 144 ha. In order to provide information on mitigation measure of the cold temperature on the peach trees in the Gangwon province, we assessed the distribution of the damaged areas of growing the peach trees in 2010 and compared it with freezing risk estimated from the dormancy depth of the peach trees and the daily minimum temperature. The dormancy depth of 'Changhowon Hwando (Prunus persica (L.) Batsch)' ranged from -62 to -90 and the freezing risk was greater than 51%. The relationship between the freezing risk and the actual damaged area ratio showed reasonable agreement (r² of 0.5 with p less than 0.01). The results imply that the estimates of the freezing risk based on the dormancy depth can be used as a mitigation measure to identify susceptible peach growing areas to freezing damage injury.
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