한국농림기상학회지, 제 11권 제3호(2009) (pISSN 1229-5671, eISSN 2288-1859)
Korean Journal of Agricultural and Forest Meteorology, Vol. 11, No. 3, (2009), pp. 100~110
DOI: 10.5532/KJAFM.2009.11.3.100
ⓒ Author(s) 2014. CC Attribution 3.0 License.

사과 ‘홍로’ 품종의 생육기 기온이 밀증상 발생에
미치는 영향과 경감기술 연구

박무용(1), 송양익(1), 한현희(2), 사공동훈(1)
(1)국립원예특작과학원 사과시험장, (2)농촌진흥청 국외농업기술팀

(2009년 07월 07일 접수; 2009년 08월 31일 수정; 2009년 09월 01일 수락)

Influence of Air Temperature during the Growing Period on Water
Core Occurrence in ‘Hongro’ Apple Cultivar and
the Mitigation Technique

Moo-Yong Park(1), Yang-Yik Song(1), Hyun-Hee Han(2),Dong-Hoon Sagong(1)
(1)Apple Experiment Station, National Institute of Horticulture & Herbal Science,
Rural Development Administration, Gunwi 716-812, Korea
(2)International Agriculture R&D Team, Rural Development Administration, Suwon, 441-707, Korea

(Received July 07, 2009; Revised August 31, 2009; Accepted September 01, 2009)

‘Hongro’ is one of the important mid-season apple cultivars bred in Korea. The recent occurrence of water core in Hongro and the consequent problems motivated this study. The objectives of our study were to investigate the influence of air temperature during the growing period on water core occurrence in Hongro and to provide methods to mitigate its impact. Based on our field experiments for three years, the results indicated that the occurrence of water core disorder was due to the prolonged exposure to high temperature (Ta) of >30oC during the ripening period. The rates of occurrence of water core disorder were higher in the fruit whose weight was more than 300g or those located outside the tree canopy and thus exposed to stronger solar radiation. In terms of mitigating the water core occurrence, the application of spraying CaCl2 four times from late July to August was effective. Furthermore, between 1 and 15 August when the rate of occurrence was high with Ta (from 3:00 to 5:00 p.m.) >30oC, the micro-water sprinkling for 30 minutes starting at 6:00 p.m. with a supplementary spray conducted two hours after the first application drastically reduced the water core occurrence.

Keyword: Malus domestica Borkh., Water core occurrence, High temperature, Fruit weight, Microwater spraying



본 실험은 국내에서 육성된 중생종 ‘홍로’ 품종에 있어 최근 문제시 되는 밀증상 발생에 미치는 온도의 영향을 밝히고 이에 따른 밀증상 억제 기술을 개발하기 위하여 3년 동안 실시되었다. ‘홍로’ 품종의 밀증 상 발생은 과실 성숙기에 30oC 이상의 고온에 장시간 노출될 때 발생하기 쉬운 것으로 판단되며, 햇빛에 노출되기 쉬운 수관의 외부에 착과된 과실, 크기가 300g 이상인 과실에서 밀증상 발생율이 높은 것으로 나타났다. 밀증상 발생 억제 기술에 있어서는 7월말 이후 염화칼슘 4회 처리 및 오후 5시까지 30oC 이상의 고온이면서 밀증상 발생율이 높은 시기인 8월 초에서 8월 15일 사이에 오후 6시경 이후로 2회 미세살수 처리를 하면 밀증상 발생이 현저하게 감소되는 것을 확인할 수 있었다.


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