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Effects of Microspraying of Water and Coating by White Materials on Fruit Sunburn Occurrence for 'Fuji'/M.9 Apple Tree

미세살수와 흰색 코팅제 도포가 '후지'/M.9 사과나무 과실 일소 발생에 미치는 영향

  • Song, Yang-Yik (Apple Research Station, National Institute of Horticulture & Herbal Science, Rural Development Administration) ;
  • Park, Moo-Yong (Apple Research Station, National Institute of Horticulture & Herbal Science, Rural Development Administration) ;
  • Yang, Sang-Jin (Horticulture & Herbal Crop Division, Extension Service Bureau, Rural Development Administration) ;
  • Nam, Jong-Chul (Apple Research Station, National Institute of Horticulture & Herbal Science, Rural Development Administration) ;
  • Sagong, Dong-Hoon (Apple Research Station, National Institute of Horticulture & Herbal Science, Rural Development Administration)
  • 송양익 (농촌진흥청 국립원예특작과학원 사과시험장) ;
  • 박무용 (농촌진흥청 국립원예특작과학원 사과시험장) ;
  • 양상진 (농촌진흥청 농촌지원국 원예특작과) ;
  • 남종철 (농촌진흥청 국립원예특작과학원 사과시험장) ;
  • 사공동훈 (농촌진흥청 국립원예특작과학원 사과시험장)
  • Received : 2010.02.04
  • Accepted : 2010.06.24
  • Published : 2010.06.30

Abstract

This study was carried out to compare and analyze control methods of the sunburn occurrence that affected 'Fuji'/M.9 planting systems in Korea from 2001 to 2003. It is very important to control temperature of the surface of fruits, because sunburn may occur when the temperature of fruit surfaces reaches $40^{\circ}C{\sim}45^{\circ}C$ due to high air temperature and sunlight during growing periods. As control methods of the sunburn occurrence, white coating materials such as $CaCO_3$ or kaolin were applied four times at two-week intervals from late June, and microspraying of water was conducted when air temperature was over $31^{\circ}C$ from late July to mid-August. Both methods were effective for preventing the sunburn occurrence and improving fruit quality by decreasing peel's temperature of fruits and increasing photosynthesis.

본 연구는 '후지'/M.9 재배에 있어 최근 문제시 되는 일소 발생 경감 기술을 비교 분석하기 위하여 3년 (2001~2003) 동안 수행하였다. 일소는 과실 성숙기에 높은 온도와 일사광에 의해 과실 온도가 $40{\sim}45^{\circ}C$에 달할 경우 발생하므로 과실 온도를 효과적으로 줄이는 것이 매우 중요하다. 이에 6월말 이후 흰색 코팅제인 카올린 및 탄산칼슘을 2주 간격으로 4회 처리한 실험과 7월 말에서 8월 중순 사이에 기온이 $31^{\circ}C$ 이상일때 미세살수 한 실험 결과를 분석해 본 결과, 두 실험 모두 일소 발생이 현저하게 감소되면서 과실품질이 향상된 것으로 나타났다. 이는 이들 처리들이 과실과 잎의 온도를 감소시켜서 광합성 능력이 증가했기 때문인 것으로 판단되었다.

Keywords

References

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