Korean Journal of Medicinal Crop Science (한국약용작물학회지)

The Korean Society of Medicinal Crop Science (한국약용작물학회)
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Determination of Growth, Yield and Carbohydrate Content of Allium hookeri Grown under Shading Treatment

차광처리에 의한 삼채의 생육, 수량 및 당함량 변화

  • Kim, Myung Hee (Department of Horticulture, Chungnam Agricultural Research Center) ;
  • Song, Beong Min (Department of Agricultural Science, Korea National Open University) ;
  • Choi, Eun Young (Department of Agricultural Science, Korea National Open University)
  • 김명희 (충남농업기술원 원예연구과) ;
  • 송병민 (한국방송통신대학교 농학과) ;
  • 최은영 (한국방송통신대학교 농학과)
  • Received : 2017.09.11
  • Accepted : 2017.11.15
  • Published : 2017.12.30
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Abstract

Background: This study was aimed at evaluating the growth, yield, and carbohydrate content in the whole Allium hookeri plant with shading treatment in hot summer. Methods and Results: Different shading rate, including 0 (control), 35 or 55%, was employed from the June $21^{st}$ to August $31^{st}$. Daily average air and soil temperature, which were approximately $2.5^{\circ}C$ and $3.8^{\circ}C$ lower, respectively, were observed with both 35% and 55% treatments in July and August, with no significant difference in daily maximum air temperature. Dry weights were high, approximately 40% and 48% for the shoot and 20% and 12% for the root, with the 35% and 55% treatments, respectively, 8 weeks after shading. Division number was increased by 13% and 19.8% with the 35% and 55% treatments, respectively. The mortality rates of 150 plants were 9.1%, 4.0%, and 1.3% with the 0 (control), 35% and 55% treatments, respectively. At 4 weeks after shading, the highest and lowest sucrose levels in both shoot and root were observed with the 35% and 55% treatments, respectively. At 8 weeks after shading, there was no significant difference in the sucrose content in the shoot among the treatments. Conclusions: The highest plant growth rate and yield with the 55% treatment may be related with the decrease in both air and soil temperatures, resulting in reducted leaf respiration and thus compensate net photosynthesis.

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References

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