Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Effects of Far-infrared Irradiance at Night on Quality of Sunlight Dried Red Pepper (Capsicum annuum L.) in Plastic Houses

비닐하우스 이용 고추 건조 시 야간 원적외선등 조사량이 품질에 미치는 영향

  • Lee, Guang-Jae (Chungcheongbuk-do Agricultural Research & Extension Services) ;
  • Kim, Si-Dong (Chungcheongbuk-do Agricultural Research & Extension Services) ;
  • Yoon, Jung-Beom (National Academy of Agricultural Science, Rural Development Administration of Korea) ;
  • Lee, Ki-Yeol (Chungcheongbuk-do Agricultural Research & Extension Services) ;
  • Choi, Kyu-Hong (National Academy of Agricultural Science, Rural Development Administration of Korea)
  • Received : 2014.05.22
  • Accepted : 2014.08.02
  • Published : 2014.12.31
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Abstract

This study was carried out to investigate the effects of night-time far-infrared irradiance quality of red pepper dried in greenhouses. This study involved 4 treatments: sunlight alone (control), or sunlight plus nightly far-infrared irradiation at $250W{\cdot}6.6m^{-2}$ ($250W{\cdot}6.6m^{-2}$), far-infrared irradiation at $250W{\cdot}3.3m^{-2}$ ($250W{\cdot}3.3m^{-2}$), or far-infrared irradiation $500W{\cdot}3.3m^{-2}$ ($500W{\cdot}3.3m^{-2}$). The drying periods were 12 days in $500W{\cdot}3.3m^{-2}$ and $250W{\cdot}3.3m^{-2}$, and 14 days in $250W{\cdot}6.6m^{-2}$, and 15 days in the control. The daytime temperature was same among the treatments. The lowest temperature was at $23.8^{\circ}C$ in control, and $29.5-37.2^{\circ}C$ in far-infrared irradiation treatments. The marketable yield was 7-14% higher in far-infrared irradiation treatments compared to the control. The rate of marketability was higher in far-infrared irradiation treatments (93.6-96.3%) than in the control (87.0-87.5%). The American Spice Trade Association (ASTA) value was greatest in the $250W{\cdot}3.3m^{-2}$ treatment, followed by $250W{\cdot}6.6m^{-2}$, then $500W{\cdot}3.3m^{-2}$, and finally the control. Capsaicinoid content showed no regular trend among the treatments. Our results provide an optimized method for reducing drying time of red pepper under sunlight, and improving the quality of dried red pepper.

본 연구는 원적외선등 적정 조사량이 상품성과 건조 효율에 미치는 효과를 구명하기 위하여 실시하였다. 원적외선등 조사량은 대조구(관행), $250W{\cdot}6.6m^{-2}$, $250W{\cdot}3.3m^{-2}$, $500W{\cdot}3.3m^{-2}$ 등 4처리를 두었다. 고추 건조기간은 $500W{\cdot}3.3m^{-2}$와 $250W{\cdot}3.3m^{-2}$는 12일, $250W{\cdot}6.63m^{-2}$는 14일, 관행은 15일이었다. 주간 온도는 처리 간에 동일하였으며, 야간 최저온도는 원적외선등 처리구가 $29.5-37.2^{\circ}C$, 관행이 $23.8^{\circ}C$로 가장 낮았다. 건고추 상품 수량은 원적외선등 $250W{\cdot}3.3m^{-2}$ 처리에서 가장 우수하였으며, 원적외선등 조사 처리구가 대조구보다 7-14% 증가하였다. 상품과율은 원적외선등 조사 처리구에서 93.6-96.3%로 대조구 87.0-87.5%보다 높았다. 고추의 ASTA 값은 $250W{\cdot}3.3m^{-2}$, $250W{\cdot}6.6m^{-2}$, $500W{\cdot}3.3m^{-2}$, 관행 순으로 높았다. 캡사이신 capsaicin 함량은 처리 간에는 일정한 경향을 나타내지 않았다. 본 실험에서 얻어진 결과는 태양초 건조 기간 단축뿐만 아니라 고추의 품질 향상에 기여하리라 기대된다.

Keywords

References

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