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Optimal Harvest Time by the Seasonal Fruit Quality and Ripening Characteristics of Hardy Kiwifruit in Korea

다래 과실의 생육시기별 과실품질과 후숙 특성에 따른 수확적기

  • Kim, Chul-Woo (Division of Special-purpose Trees, Korea Forest Research Institute) ;
  • Oh, Sung-Il (Division of Special-purpose Trees, Korea Forest Research Institute) ;
  • Kim, Mahn-Jo (Division of Special-purpose Trees, Korea Forest Research Institute) ;
  • Park, Youngki (Division of Special-purpose Trees, Korea Forest Research Institute)
  • 김철우 (국립산림과학원 특용자원연구과) ;
  • 오성일 (국립산림과학원 특용자원연구과) ;
  • 김만조 (국립산림과학원 특용자원연구과) ;
  • 박영기 (국립산림과학원 특용자원연구과)
  • Received : 2014.03.03
  • Accepted : 2014.06.13
  • Published : 2014.09.30

Abstract

In order to obtain the basic data that could be used to evaluate the harvest time of new hardy kiwifruit cultivars (Actinidia arguta 'Saehan', 'Daesung' and 'Chilbo'), the seasonal fruit quality and ripening characteristics of hardy kiwifruit were investigated. Fruit sizes of 'Saehan', 'Daesung' and 'Chilbo' were increased from full bloom to 66 days, 85 days and 78 days, respectively. The growth curve of developing fruit of three cultivars showed double sigmoid. As a result of correlation analysis, the seed number per fruit showed a significant positive correlation with fruit weight (r = 0.94~0.97, p<0.01). Fruit length, width, thickness, weight, soluble solid content and titratable acidity were significantly different among the cultivars. Titratable acidity was increased from full bloom to harvest time and the titratable acidity of 'Saehan', 'Daesung' and 'Chilbo' were 1.77%, 1.22% and 1.37% on havest time, respectively. Optimal harvest time of 'Saehan' was 108 days (23 Sep.) after full bloom, those of 'Daesung' and 'Chilbo' were 92 (9 Sep.) days after full bloom.

다래의 수확적기를 판정할 수 있는 기초자료를 제공하고자 다래 신품종 '새한', '대성' 및 '칠보'의 생육시기별 과실품질과 후숙 특성을 조사하였다. 과실의 비대는 '새한', '대성' 및 '칠보'의 경우 각각 만개 후 66일, 85일 및 78일 까지 진행되었다. 생장곡선은 3품종 모두 이중 S자형으로 나타났다. 상관분석 결과 세 품종 모두 과실 무게가 증가할수록 과실 내 종자수가 많아지는 정의 상관관계가 있었다(r = 0.94~0.97, p<0.01). 과실의 크기, 가용성 고형물 함량 및 산함량에서 품종 간 및 과실의 생육시기 간에 통계적인 유의적 차이가 있었다. 산함량은 3품종 모두 수확적기까지 증가하였고, 수확적기의 산함량은 '새한' 1.77%, '대성' 1.22%, '칠보' 1.37%로 나타났다. 수확 후 후숙 특성을 조사한 결과 수확적기의 만개 후 생육일수는 '새한'이 108일(9월 23일), '대성'과 '칠보'가 92일(9월 9일)로 나타났다.

Keywords

References

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