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2026 Vol.35, Issue 3 Preview Page

Original Articles

Optimal Harvest Time and Ripening Period after Commercial Ethylene Generator Treatment in ‘Hayward’ Kiwifruit Grown in Gyeongnam

경남 지역 ‘헤이워드’ 키위프루트의 적정 수확 시기 및 상업용 에틸렌 발생제 처리 후 후숙 기간 평가

Sang Woo Choi1*
,
Jin Hyang Son1
,
Mi Geon Cheon2
최 상우1*
,
손 진향1
,
천 미건2
1Agricultural Junior Researcher, Research and Development Bureau, Gyeongsangnamdo Agricultural Research & Extension Services, Jinju 52733, Korea
2Agricultural Senior Researcher, Research and Development Bureau, Gyeongsangnamdo Agricultural Research & Extension Services, Jinju 52733, Korea
1경상남도농업기술원 연구개발국 농업연구사
2경상남도농업기술원 연구개발국 농업연구관
*Corresponding Author
31 July 2026. pp. 293-302
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Abstract

This study was conducted to evaluate the optimal harvest time and ripening period after commercial ethylene generator treatment for ‘Hayward’ kiwifruit grown in Gyeongnam, Korea. Fruits were harvested at 152, 156, 159, 163, 166, 170, 173, and 177 days after full bloom (DAFB) in both 2024 and 2025, and dry matter, soluble solids content, firmness, and titratable acidity were measured immediately after harvest. The harvested fruits were treated with a commercial ethylene generator at 18°C and 90% relative humidity for 24 h, and then ripened at 15°C and 90% relative humidity for 3, 6, 9, and 12 days to evaluate fruit quality. As harvest time was delayed, dry matter and soluble solids content tended to increase, whereas firmness decreased. Fruits harvested at or after 166 DAFB tended to reach the minimum quality standards required for harvest. During ripening, soluble solids content increased and firmness decreased as the ripening period progressed, and fruits harvested at or after 166 DAFB showed quality characteristics suitable for consumption after 12 days of ripening. In addition, dry matter at harvest showed a significant positive relationship with soluble solids content after ripening, indicating that dry matter can be used as a key indicator for predicting post-ripening eating quality. Growing degree days (GDD) from full bloom to each harvest date showed significant positive linear relationships with both dry matter and soluble solids content at harvest, and the GDD at approximately 166 DAFB exceeded 2,100 °C·day in both years, suggesting its potential as a reference index for determining the optimal harvest time. Therefore, under the conditions of this study, harvesting ‘Hayward’ kiwifruit grown in Gyeongnam at 166 DAFB or when GDD exceeds 2,100 °C·day, corresponding to the recommended harvest indices of ≥17% dry matter and ≥7 °Brix soluble solids content, followed by 12 days of ripening after commercial ethylene generator treatment, may be suitable for ensuring desirable ripened fruit quality.

Keywords
climate change
days after full bloom
ethylene treatment
phenology
storability

본 연구는 경남 지역에서 재배된 ‘헤이워드’ 키위프루트의 적정 수확 시기와 상업용 에틸렌 발생제 처리 후 적정 후숙 기간을 평가하기 위해 수행하였다. 2024년과 2025년에 만개 후 152, 156, 159, 163, 166, 170, 173 및 177일에 과실을 수확하여 수확 직후 건물함량, 가용성 고형물 함량, 경도 및 적정산도를 조사하였다. 수확한 과실은 상업용 에틸렌 발생제를 이용하여 18°C, 상대습도 90% 조건에서 24시간 처리한 후, 15°C, 상대습도 90% 조건에서 3, 6, 9 및 12일간 후숙시켜 과실 품질을 분석하였다. 수확 시기가 늦어질수록 건물함량과 가용성 고형물 함량은 증가하고 경도는 감소하는 경향을 보였으며, 만개 후 166일 이후 수확한 과실은 수확 품질에 필요한 최소 기준에 도달하는 경향을 보였다. 후숙 기간이 길어질수록 가용성 고형물 함량은 증가하고 경도는 감소하였으며, 만개 후 166일 이후 수확한 과실은 후숙 12일차에 섭취 적합 수준의 품질 특성을 보였다. 또한 수확 시 건물함량은 후숙 후 가용성 고형물 함량과 유의한 양의 상관관계를 보여, 후숙 후 소비 품질을 예측하는 주요 지표로 활용될 수 있음을 확인하였다. 만개일부터 각 수확 시기까지의 적산온도는 수확 시 건물함량 및 가용성 고형물 함량과 유의한 양의 선형관계를 나타냈으며, 만개 후 약 166일의 적산온도는 두 연도 모두 약 2,100°C·day 이상으로 나타나 수확 적기 판단을 위한 참고 기준으로 활용 가능성을 확인하였다. 따라서 경남 지역에서 재배된 ‘헤이워드’ 키위프루트는 만개 후 약 166일, 또는 약 2,100°C·day 이상의 적산온도에 도달한 시점을 기준으로 건물함량 17% 이상 및 가용성 고형물 함량 7°Brix 이상의 권장 수확 기준에 근접하거나 이를 충족하는 시점에 수확하는 것이 적절하며, 상업용 에틸렌 발생제 처리 후 12일간 후숙하는 것이 후숙 과실의 품질 확보에 적합한 것으로 판단된다.

키워드
기후변화
만개 후 일수
생육단계
에틸렌 처리
저장성
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Information
  • Publisher :The Korean Society for Bio-Environment Control
  • Publisher(Ko) :(사)한국생물환경조절학회
  • Journal Title :Journal of Bio-Environment Control
  • Journal Title(Ko) :생물환경조절학회지
  • Volume : 35
  • No :3
  • Pages :293-302
  • Received Date : 2026-06-11
  • Revised Date : 2026-07-28
  • Accepted Date : 2026-07-30
  • DOI :https://doi.org/10.12791/KSBEC.2026.35.3.293
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