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2021 Vol.66, Issue 4 Preview Page

Original Research Article

Yield of Tuber Roots and Functional Substances According to the Planting Interval and Cultivation Period in Sweetpotato (Ipomoea batatas L.)

재식간격 및 재배 기간에 따른 고구마 수량 및 유용성분 함량 평가

Won Park1
Tae Hwa Kim2
Hyeong-Un Lee2
Im Been Lee2
Su Jung Kim2
Jae Hwan Roh3
Mi Nam Chung3*
박 원1
김 태화2
이 형운2
이 임빈2
김 수정2
노 재환3
정 미남3*
1Post-doctor, Bioenergy Crop Research Institute, National Institute of Crop Science, Muan 58545, Korea
2RDA Researcher, Bioenergy Crop Research Institute, National Institute of Crop Science, Muan 58545, Korea
3RDA Senior Researcher, Bioenergy Crop Research Institute, National Institute of Crop Science, Muan 58545, Korea
1국립식량과학원 바이오에너지작물연구소 박사후연구원
2국립식량과학원 바이오에너지작물연구소 농업연구사
3국립식량과학원 바이오에너지작물연구소 농업연구관
*Corresponding Author
1 December 2021. pp. 383-391
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Abstract

To develop a cultivation method for the mass production of sweetpotato cultivars, ‘Juhwangmi’ (orange tuber) and ‘Sinjami’ (puple tuber), the yield of tuber roots and content of various functional substances were analyzed according to planting intervals and growing periods. For ‘Juhwangmi, the total yield of tubers was increased by respectively 36% and 54% and the yield of tubers over 300 g was increased by respectively 170% and 221% in the 140-day and 160-day cultivation plots compared with that in the 120-day cultivation plot at the 70×20 cm planting interval. Similarly, the total content of beta-carotene in the tubers increased as the cultivation period was extended. In particular, beta-carotene content at the 70×20 cm planting interval was the highest. For ‘Sinjami’, at the same planting interval, the total yield of tubers and yield of tubers over 300 g significantly increased as the growing period was extended. Within the same cultivation period, the yield of tubers over 300 g and the total anthocyanin content of ‘Sinjami’ were higher at the 70×30 and 70×35 cm planting intervals than at the 70×20 and 70×25 cm planting intervals in the 140-day and 160-day cultivation plots. Moreover, the total polyphenol and flavonoid content was significantly higher in ‘Sinjami’ than in ‘Juhwangmi’, and the values were the highest in the 160-day cultivation plots. In particular, the content of these two functional substances in tubers over 300 g was the highest at the 70×30 and 70×35 cm planting intervals.

Keywords
cultivation period
functional substances
planting interval
storage root
sweetpotato
yield
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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 : 66
  • No :4
  • Pages :383-391
  • Received Date :2021. 08. 23
  • Revised Date :2021. 10. 08
  • Accepted Date : 2021. 10. 25
  • DOI :https://doi.org/10.7740/kjcs.2021.66.4.383
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