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2021 Vol.30, Issue 4 Preview Page

Original Articles

Influence of Time of Hand-thining on Bitter Pit Incidence and Fruit Quality in ‘Gamhong’/M.9 Apple Trees

인력 적과 시기가 ‘감홍’/M.9 사과나무의 고두증상 발생과 과실품질에 미치는 영향

Hun-Joong Kweon1
,
Dong-Hoon Sagong23*
권 헌중1
,
사공 동훈23*
1Senior Researcher, Apple Research Institute, National Institute of Horticultural and Herbal Science, Rural Development Administration, Gunwi 39000, Korea
2Professor, Division of Life and Environmental Science (Horticulture), College of Natural and Life Sciences, Daegu University, Gyeongsan 38453, Korea
3Professor, Institute of Basic Science, Daegu University, Gyeongsan 38453, Korea
1농촌진흥청 국립원예특작과학원 사과연구소 농업연구관
2대구대학교 과학생명융합대학 생명환경학부 원예학전공 교수
3대구대학교 기초과학연구소 교수
*Corresponding Author
31 October 2021. pp. 342-350
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Abstract

This study was conducted to investigate the effect of time of hand-thinning on vegetative growth, bitter pit incidence, fruit quality, and return bloom in ‘Gamhong’/M.9 apple trees. The time of hand-thinning were 3, 5, 7 and 9 weeks after full bloom, and the primary thinning (leaving only the king fruit on cluster) and secondary thinning (adjusting crop load) were conducted at the same time. The time of hand-thinning was correlated to the vegetative growth, average fruit wight, yield, soluble solids content, bitter pit incidence, and return bloom, negatively, and to the yield of middle grade fruits (fruit weight was 250－299g and none pit on fruit surface) per tree, calcium contents of leaves, and fruit red color, positively. There was no significant effect of time of hand-thinning on fruit firmness, titratable acidity, and total incomes per tree. In conclusion, if the time of hand-thinning of ‘Gamhong’/M.9 apple tree was completed at 9 weeks after full bloom, it could produce about 300g of high-quality fruit without bitter pit.

Keywords
fruit red color
gross incomes
Malus domestica Borkh.
return bloom
vegetative growth

본 시험은 ‘감홍’/M.9 사과나무의 인력 적과 시기가 영양생장, 고두증상, 과실품질 및 이듬해 개화율에 미치는 영향을 조사하고자 실시하였다. 인력 적과 시기는 만개 후 3, 5, 7, 9주였으며, 1차 적과(중심과만 남기는 적과)와 2차 적과(착과수 조절을 위한 적과)는 동시에 이루어졌다. 인력 적과 시기는 영양생장, 평균 과중, 생산량, 가용성 고형물 함량, 고두증상 발생률 및 이듬해 개화율과 역의 상관관계를 가졌으나 나무별 중급 과실(과중이 214－299g이면서 고두증상이 발생하지 않은 과실)의 생산량, 잎 내 칼슘 함량 및 과실의 착색 정도와는 정의 상관관계를 가졌다. 과실의 경도, 산 함량 및 나무 당 총 조수입은 인력 적과 시기에 영향을 받지 않았다. 결론적으로, ‘감홍’/M.9 사과나무의 인력 적과가 만개 후 9주에 마무리되면 고두증상이 없는 300g 정도의 고품질 과실을 생산할 수 있었다.

키워드
과실 착색
조수입
Malus domestica Borkh.
이듬해 개화율
영양생장
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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 : 30
  • No :4
  • Pages :342-350
  • Received Date : 2021-07-05
  • Revised Date : 2021-08-10
  • Accepted Date : 2021-10-13
  • DOI :https://doi.org/10.12791/KSBEC.2021.30.4.342
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