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2026 Vol.35, Issue 3

Original Articles

Effects of GA3 Treatment, Pre-sprouting Light Exposure Period, Light Intensity, and Nutrient Solution Concentration of Potato Minitubers on Dormancy Breaking, Plant Height, and Node Number for Sprout-seedling Production in Hydroponic Seed Potato Culture

수경재배 씨감자 맹아묘 생산을 위한 소괴경의 GA3 처리, 산광기간, 광도 및 양액농도가 휴면타파와 묘 길이, 마디수에 미치는 영향

Kyeong Pyo Kim1
,
Jeong Hoon Park1
,
Chan Il Un1
,
Jeong Sun Kim2
,
Hyo Sun Song3
,
Tae Wan Kang2
,
Young Yeol Cho4*
김 경표1
,
박 정훈1
,
운 찬일1
,
김 정선2
,
송 효선3
,
강 태완2
,
조 영열4*
1Researcher, Jeju Special Self-Governing Province Agricultural Research and Extension Services, Jeju 63556, Korea
2Senior Researcher, Jeju Special Self-Governing Province Agricultural Research and Extension Services, Jeju 63556, Korea
3Senior Extensionist, Jeju Special Self-Governing Province Agricultural Research and Extension Services, Jeju 63556, Korea
4Professor, Horticultural Science Major, Jeju National University, Jeju 63243, Korea
1제주특별자치도 농업기술원 연구사
2제주특별자치도 농업기술원 연구관
3제주특별자치도 농업기술원 지도관
4제주대학교 원예과학전공 교수
*Corresponding Author
31 July 2026. pp. 171-181
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Abstract

This study was conducted to establish a stable production system for sprout seedlings for hydroponic seed potato production by elucidating the effects of dormancy-breaking treatments of minitubers and nursery environmental factors on the growth characteristics of sprout seedlings. The experiments were carried out in the potato nursery facility at the Jeju Special Self-Governing Province Agricultural Research and Extension Services during the autumn and spring cultivation seasons, using the potato cultivars ‘Tamna’ and ‘Daeji’. In the dormancy-breaking experiment, gibberellic acid (GA3) treatment significantly reduced the number of days required for dormancy release in both cultivars compared with the untreated control, and dormancy release was progressively accelerated as the GA3 concentration increased. In the light-exposure duration experiment, longer periods of light exposure after dormancy breaking resulted in increased plant height and number of nodes, with stable seedling growth being achieved when the light-exposure period exceeded 14 days. In the light-intensity experiment, increasing light intensity suppressed excessive stem elongation by reducing plant height, whereas the response of node number varied depending on the cultivation season. In the nutrient solution experiment, increases in electrical conductivity (EC) of the nutrient solution led to increases in both plant height and node number, which was interpreted as a result of enhanced shoot growth due to improved nutrient supply. Taken together, these results indicate that stable production of sprout seedlings for hydroponic seed potato cultivation requires dormancy breaking using an appropriate concentration of GA3, a light-exposure period of at least 14 days, suppression of excessive elongation through high light intensity, and appropriate management of nutrient solution concentration to prevent excessive vegetative growth. The findings of this study are expected to serve as fundamental data for establishing nursery environment management techniques for hydroponic seed potato production.

Keywords
GA3
light intensity
nutrient concentration
pre-sprouting period
sprout seedling

본 연구는 수경재배 씨감자 생산을 위한 맹아묘의 안정적 생산 체계를 확립하기 위하여, 소괴경의 휴면타파 처리 및 육묘 환경 요인이 맹아묘의 생육 특성에 미치는 영향을 구명하고자 수행되었다. 시험은 제주특별자치도 농업기술원 감자 육묘실에서 ‘탐나’와 ‘대지’ 품종을 대상으로 가을 및 봄 작기에 걸쳐 실시하였다. 소괴경 휴면타파 시험에서는 GA3 처리 시 두 품종 모두에서 무처리구 대비 휴면타파 소요일수가 유의하게 단축되었으며, 처리 농도가 증가할수록 휴면타파가 촉진되는 경향을 보였다. 산광기간 시험에서는 휴면타파 후 산광기간이 길어질수록 묘 길이와 마디수가 증가하는 경향이 나타났으며, 특히 14일 이상의 산광기간에서 안정적인 생육 확보가 가능하였다. 광도 처리 시험에서는 광도가 증가할수록 묘 길이는 감소하여 도장 생육이 억제되었으나, 마디수는 재배 시기에 따라 상이한 반응을 보였다. 양액 농도 시험에서는 양액의 전기전도도(EC)가 증가함에 따라 묘 길이와 마디수가 증가하는 경향이 확인되었으며, 이는 양분 공급 수준 증가에 따른 지상부 생육 촉진 효과로 해석되었다. 이상의 결과를 종합할 때, 수경재배 씨감자용 맹아묘 생산을 위해서는 적정 농도의 GA3를 이용한 휴면타파, 14일 이상의 산광 처리, 고광도 조건을 통한 도장 억제, 그리고 과도한 생장을 방지할 수 있는 적정 수준의 양액 관리가 중요한 것으로 판단된다. 본 연구 결과는 수경재배 씨감자 생산을 위한 맹아묘 육묘 환경 관리 기술 확립에 기초 자료로 활용될 수 있을 것으로 기대된다.

키워드
광도
맹아묘
산광최아기간
양액농도
GA3
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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 :171-181
  • Received Date : 2026-03-20
  • Revised Date : 2026-04-21
  • Accepted Date : 2026-04-28
  • DOI :https://doi.org/10.12791/KSBEC.2026.35.3.171
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