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2025 Vol.38, Issue 4 Preview Page

Research Article

Effects of Planting Time and Row Cover Type on Sweetpotato (Ipomoea batatas L.) Sprout Growth in an Unheated Greenhouse During a Low-Temperature Period

저온기 무가온 비닐하우스에서 고구마 파종 시기와 피복이 묘 생육에 미치는 영향

Kyo Hwui Lee1
,
Won Park1
,
Tae Hwa Kim1
,
Jonguk An1
,
Sang Sik Nam2
,
Mi Nam Chung3
,
Hyeong-Un Lee3
,
Koan Sik Woo4
이 교휘1
,
박 원1
,
김 태화1
,
안 종욱1
,
남 상식2
,
정 미남3
,
이 형운3
,
우 관식4
1Researcher, Value Crop Research Institute, National Institute of Crop Science, Muan 58545, Korea
2Post-doc, Value Crop Research Institute, National Institute of Crop Science, Muan 58545, Korea
3Senior Researcher, Value Crop Research Institute, National Institute of Crop Science, Muan 58545, Korea
4Senior Researcher, Planning & Coordination Division, National Institute of Crop Science, Wanju 55365, Korea
1국립식량과학원 소득식량작물연구소, 연구사
2국립식량과학원 소득식량작물연구소, 박사후연구원
3국립식량과학원 소득식량작물연구소, 연구관
4국립식량과학원 기획조정과, 연구관
*Corresponding Author
1 August 2025. pp. 375-386
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Abstract

This study investigated the effects of planting time and row cover type on sweetpotato sprout growth under low-temperature conditions. The experiment was conducted in an unheated double-layer greenhouse over two years (2023 and 2024) using three cultivars: ‘Sodammi’, ‘Jinyulmi’ and ‘Hopungmi’. Storage roots were planted in early, middle, and late February, with two row cover treatments: conventional plastic cover (CC) and thermal insulated cover (TC). Results showed that TC increased soil temperature by 1.4℃ and minimum temperature by 2.0℃, which helped reduce sprouting time by 11.3% compared to CC in the cold-sensitive cultivar ‘Sodammi’. ‘Jinyulmi’ exhibited the highest cumulative seedling yield (302.2 seedlings/㎡) under early February planting, while ‘Sodammi’ had the lowest (25.7 seedlings/㎡). TC treatment significantly improved cumulative seedling yield across all cultivars, particularly benefiting ‘Sodammi’ by mitigating low-temperature stress. Additionally, delayed planting in late February led to increased soil temperatures, enhancing sprouting and seedling growth. These findings suggest that adjusting planting time and applying thermal insulated cover can enhance seedling productivity and improve early sprouting.

Keywords
Low-temperature
Seedling
Sprouting rate
Sweetpotato
Yield
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Information
  • Publisher :The Plant Resources Society of Korea
  • Publisher(Ko) :한국자원식물학회
  • Journal Title :Korean Journal of Plant Resources
  • Journal Title(Ko) :한국자원식물학회지
  • Volume : 38
  • No :4
  • Pages :375-386
  • Received Date : 2025-04-09
  • Revised Date : 2025-05-20
  • Accepted Date : 2025-05-21
  • DOI :https://doi.org/10.7732/kjpr.2025.38.4.375
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