기후변화에 대응한 ‘후지’ 사과 과원의 지리적 위치별 과실특성 비교

초록

This study aimed to analyze the impacts of climate change on harvest timing and fruit quality of 'Fuji' apples across eight major apple-production regions in Korea, including Gyeongsangbuk-do (GB; Andong, Cheongsong, Yeongju, Uiseong), Gyeongsangnam-do (GN; Miryang), Jeonbuk-do (JB; Jangsu), Gyeonggi-do (GG; Paju), and Gangwon-do (GW; Jeongseon). The apple orchards were located at latitudes of 36°for GB, 35°for GN and JB, and 37°for GG and GW. In October, the minimum temperatures dropped to 5℃ in Cheongsong, 6.4℃ in Jangsu, and 5.7℃ in Jeongseon. Regardless of the geographical differences, the harvest timing differed approximately 10 days across the regions. At harvest, fruit firmness was slightly lower in GB and GN regions ranging from 56.6 to 64.1 N, whereas apples from the JB, GG, and GW regions showed higher firmness levels, ranging from 67.8 to 72.2 N. Titratable acidity (TA) and internal ethylene concentration (IEC) showed no significant differences among the regions. The a* value, an indicator of red skin coloration,was also relatively low in Cheongsong (25.8), Jeongseon (27.5), and Paju (26.2). showing no distinct differences among growing regions. After 180 days of cold storage, apples from Andong, Miryang, and Paju maintained higher fruit frimness (59.4-64.5 N) and exhibitedrelatively low IEC ranging from 87.0 to 112.5 μL·L . TA gradually decreased during storage duration, whereas soluble solids contentremained unchanged. Therefore, despite concerns about rising temperatures under the RCP 4.5 and 8.5 scenarios, no significant differences in the fruit quality of 'Fuji' apples have been observed to date across apple-growing regions of Korea.

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