KOREAN JOURNAL OF CROP SCIENCE (한국작물학회지)

The Korean Society of Crop Science (한국작물학회)
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The Influence of Soil Characteristics and Sweet Potato (Ipomoea batatas L.) Varieties on Fiber Content

재배지역 토양특성과 고구마 품종의 섬유질 함량 차이

  • Park, Won (Bioenergy Crop Research Institute, National Institute of Crop Science) ;
  • Chung, Mi Nam (Bioenergy Crop Research Institute, National Institute of Crop Science) ;
  • Lee, Hyeong-Un (Bioenergy Crop Research Institute, National Institute of Crop Science) ;
  • Kim, Tae Hwa (Bioenergy Crop Research Institute, National Institute of Crop Science) ;
  • Kim, Su Jung (Bioenergy Crop Research Institute, National Institute of Crop Science) ;
  • Nam, Sang Sik (Bioenergy Crop Research Institute, National Institute of Crop Science)
  • 박원 (국립식량과학원 바이오에너지작물연구소) ;
  • 정미남 (국립식량과학원 바이오에너지작물연구소) ;
  • 이형운 (국립식량과학원 바이오에너지작물연구소) ;
  • 김태화 (국립식량과학원 바이오에너지작물연구소) ;
  • 김수정 (국립식량과학원 바이오에너지작물연구소) ;
  • 남상식 (국립식량과학원 바이오에너지작물연구소)
  • Received : 2022.06.06
  • Accepted : 2022.08.17
  • Published : 2022.09.01
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Abstract

Sweet potato varieties with high fiber content in the storage root have poor texture when steamed or roasted. This study investigates the difference in fiber content among sweet potato varieties by soil and climate. The average fiber content of 'Hogammi', 'Sodammi', 'Pungwonmi', 'Danjami', and 'Jinyulmi' cultivars from the samples collected at farms in Haenam, Muan, and Unbong, Korea were 95.71, 66.73, 44.55, 40.55, and 38.53 mg/100g FW, respectively. There was no significant difference between site-specific conditions and varieties. Based on the degree of visual fibrousness, 'Hogammi' has an average of 3.6-4.0 with many thick stringy fibers. The fiber content of the 'Hogammi' cultivar was measured across 19 sites representing the main sweet potato growing regions of Korea. The fiber content was between 115.82 and 114.6 mg/100g in Haenam 2 and Boryeong 1, and 87.46 mg/100g in Hamyang. However, the fiber content at the remaining 16 sites was within the range of 94.63-108.52 mg/100g, although there were some site-level differences. The fiber content of the sweet potato storage roots were positively correlated with soil phosphorus (R2 = 0.58**), organic matter (R2 = 0.52*), and pH (R2 = 0.51*), which had a significance of 1% and 5%. The fiber content of sweet potato storage roots was found to have increased with increasing phosphorus content, organic matter and pH in the soil. However, there was no correlation with the amount of precipitation, days of precipitation and hours of sunshine with the fiber content of sweet potato at the selected sites.

고구마 품종 중에는 찌거나 구웠을 때 육질 부분에 질긴 섬유질이 많아 섭취 시 식감을 떨어뜨리는 요인이 되고 있다. 최근 육성된 고구마 품종의 재배지역 간 섬유질의 발생량 차이 및 재배지역의 재배환경과 괴근의 섬유질 발생량과의 관계를 조사하고자 수행하였다. 1. 해남, 무안, 그리고 운봉 농가 포장 등 3개 지역의 품종별 평균 섬유질 함량은 '호감미' 95.71, '소담미' 66.73 mg/100g FW으로 많았고, '풍원미' 44.55, '단자미' 40.55, 그리고 '진율미' 38.53 mg/100g FW와 품종 간에는 차이가 있었으며 재배지역과 품종 간에 상호 유의성은 없었다. 2. 해남 등 3개 지역에서 수확한 5품종에서 분리한 섬유질의 식감저해 정도는 재배지역에 관계없이 '호감미' 품종에서 실 모양의 섬유질이 굵고 길게 존재하여 3.6~4.0 정도로 평가되어 '진율미', '풍원미', '소담미', '단자미' 품종과 차이가 있었다. 3. 고구마 재배지역 13개 시·군 19지점의 농가 포장에서 수집한 '호감미' 품종의 섬유질 발생량은 해남2와 보령1포장에서 수집한 고구마가 115.82, 114.6 mg/100g으로 발생량이 많았으며 함양은 87.46 mg/100g으로 발생량이 적어 차이가 있었다. 그러나 3개 지역 이외 16지점의 섬유질 함량은 지역별 94.63~108.52 mg/100g 범위로 유의성은 없었다. 4. 고구마의 섬유질 함량과 토양 중의 인산 함량은 R2= 0.58**, 유기물은 0.52* 그리고 pH는 0.51*로 각각 1%와 5% 수준에서 정의 상관을 보여 토양 중에 인산과 유기물 함량이 많고 pH가 높을수록 섬유질이 많음을 알 수 있었다. 5. 재배지역의 강수량, 강수일수, 그리고 일조시간 등 기상 여건과 고구마 섬유질 함량과의 유의성은 없는 것으로 나타났다.

Keywords

Acknowledgement

본 논문은 농촌진흥청(과제번호: PJ01513202) 과제 연구비 지원에 의해 수행된 결과이며 연구비 지원에 감사드립니다.

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