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2025 Vol.70, Issue 4 Preview Page

Original Research Article

Optimizing Early Transplanting and Harvesting Dates for ‘Hopoungmi’ and ‘Sodammi’ Sweet Potato (Ipomoea batatas (L.) Lam.) in Cheongju under Climate Change

기후변화에 따른 청주지역에서 고구마(Ipomoea batatas (L.) Lam.) ‘호풍미’ 및 ‘소담미’의 조기삽식 및 수확 시기 재설정

Hyeon-Seong Yoo1†
,
Eun-Seong Baek1†
,
Eun-Bin Hwang1
,
Dong-Geon Nam1
,
Eun-chae Bae1
,
Na-yun Lee2
,
Gun-ho Lee2
,
Sang-Cheol Gwak3
,
Tae-Young Hwang4*
유 현성1†
,
백 은성1†
,
황 은빈1
,
남 동건1
,
배 은채1
,
이 나윤2
,
이 건호2
,
곽 상철3
,
황 태영4*
1Graduate Student, Department of Crop Science, Chungbuk National University, Cheongju 28644, Republic of Korea
2University Student, Department of Crop Science, Chungbuk National University, Cheongju 28644, Republic of Korea
3Research Assistant, Department of Crop Science, Chungbuk National University, Cheongju 28644, Republic of Korea
4Associate Professor, Department of Crop Science, Chungbuk National University, Cheongju 28644, Republic of Korea
1충북대학교 식물자원학과 대학원생
2충북대학교 식물자원학과 대학생
3충북대학교 식물자원학과 조교
4충북대학교 식물자원학과 부교수
*Corresponding Author
†Theses authors contributed equally to this work.
1 December 2025. pp. 328-343
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Abstract

This study aimed to determine the optimal early transplanting and harvesting periods for sweet potato cultivars, ‘Hopungmi’ and ‘Sodammi’, in response to climate change. Field trials were conducted over two years (2023 and 2024) in Cheongju, South Korea. Transplanting dates were set at five intervals: April 14 (T1), April 19 (T2), April 24 (T3), April 29 (T4), and May 4 (T5), and harvests were conducted at 110 and 120 days after transplanting (DAT). In terms of storage root yields in 2023, ‘Hopungmi’ showed the highest yield at 120 DAT in T4 (2,742.9 kg 10a-1), while ‘Sodammi’ showed the highest yield at 110 DAT in T5 (1,122.3 kg 10a-1). In 2024, the highest yield for ‘Hopungmi’ was observed at 120 DAT in T3 (2,596.0 kg 10a-1), and for ‘Sodammi’, the highest yield was recorded at 120 DAT in T3 (1,819.3 kg 10a-1). The 2024 storage root yields of ‘Hopungmi’ at 110 DAT and ‘Sodammi’ across both cultivation periods were higher than those observed in 2023, which was attributed to the greater cold stress during the early growth stage in 2023 compared with 2024. Correlation analysis between the above shoot growth and storage root yields revealed a significant positive correlation between main vine length and storage root yields. For the soluble solid content of steamed roots, in ‘Hopungmi’, the highest SSC was recorded at T2 for 110 DAT in 2023 (29.1 °Brix) and 2024 (26.8 °Brix). In ‘Sodammi’, the highest SSC was also observed at T2 for 110 DAT in 2023 (27.6 °Brix) and 2024 (27.8 °Brix). These results indicate that the effects of transplanting and harvest schedules vary, depending on annual climatic conditions. Therefore, this study suggests that determining the optimal transplanting and harvest timing for sweet potato under changing climatic conditions can help minimize climate variability and contribute to more stable cultivation.

Keywords
harvesting date
Hopungmi
Sodammi
sweet potato
transplanting date
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Information
  • Publisher :The Korean Society of Crop Science
  • Publisher(Ko) :한국작물학회
  • Journal Title :The Korean Journal of Crop Science
  • Journal Title(Ko) :한국작물학회지
  • Volume : 70
  • No :4
  • Pages :328-343
  • Received Date : 2025-10-13
  • Revised Date : 2025-10-18
  • Accepted Date : 2025-10-30
  • DOI :https://doi.org/10.7740/kjcs.2025.70.4.328
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