Journal of Bio-Environment Control (생물환경조절학회지)

The Korean Society for Bio-Environment Control (한국생물환경조절학회)
권호 표지

Development of Temperature Control Technology of Root Zone using Evaporative Cooling Methods in the Strawberry Hydroponics

증발 냉각방식을 이용한 딸기 수경재배의 배지 온도조절 기술 개발

  • Kim, Ki-Dong (Hanyangtech Co.) ;
  • Ha, Yu-Shin (Dept. of Bio-Industrial Machinery Engineering, Kyungpook National University) ;
  • Lee, Ki-Myung (Dept. of Bio-Industrial Machinery Engineering, Kyungpook National University) ;
  • Park, Dae-Heum (Sun Green Energy Co., Ltd.) ;
  • Kwon, Soon-Gu (Dept. of Bio-Industrial Machinery Engineering, Pusan National University) ;
  • Park, Jong-Min (Dept. of Bio-Industrial Machinery Engineering, Pusan National University) ;
  • Chung, Sung-Won (Dept. of Bio-Industrial Machinery Engineering, Pusan National University)
  • 김기동 (한양테크) ;
  • 하유신 (경북대학교 생물산업기계공학과) ;
  • 이기명 (경북대학교 생물산업기계공학과) ;
  • 박대흠 (태양그린에너지(주)) ;
  • 권순구 (부산대학교 바이오산업기계공학과) ;
  • 박종민 (부산대학교 바이오산업기계공학과) ;
  • 정성원 (부산대학교 바이오산업기계공학과)
  • Received : 2010.08.25
  • Accepted : 2010.11.13
  • Published : 2010.12.31
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Abstract

It is necessary to develop an efficient and affordable cooling technology and apply the practical system to rural farmhouse, control to adequate growth environment by adjusting temperature of root zone. A study on managing medium temperature of the hydroponics for strawberry cultivation was conducted and feasible evaporative cooling system for the media cooling were as follows: Characteristics of temperature drop were investigated for the evaporative cooling devices using microporous film duct, felt mulching on media surface, and water permeable sheet in culture tank. The evaporative device with water permeable sheet in culture tank was the most efficient and economic on media cooling system.

본 연구는 딸기의 수경재배에서 증발냉각방식을 이용하여 배지의 지하부 온도를 관리할 수 있는 냉각시스템을 개발하고 고온기 온실내 기온에 따른 배지내 온도분포 특성을 분석하고자 다공질 필름 덕트법, 배지 상면 기습부직포 멀칭법, 투수부직포 재배조 표면 증발법의 3가지 냉각시스템에 대하여 배지냉각특성을 시험하였다. 그 결과 투수부직포 재배조 표면 증발법의 경우 온실내 기온 $35^{\circ}C$인 배지표면의 온도와 상대습도 50%일 때 재배조 표변의 부직포의 온도는 $27^{\circ}C$로 니타났으며, 뿌리가 많이 분포되어 있는 배지내 온도는 $28{\sim}30^{\circ}C$ 정도로 나타나 외기온에 비하여 $5{\sim}7^{\circ}C$ 정도로 기장 크게 강하되었다. 따라서, 투수부직포 재배조 표면 증발법이 가장 효율적인 배지냉각 방법이라고 판단된다.

Keywords

References

  1. Ball, V. 1984. Cornell research concerning the response of alstroemeria to environmental conditions. Grower Talks Magazine, February 1984. p. 14-21.
  2. Ikeda, T., H. Kumakura, H. Hamamoto, and T. Fujiwara. 2006. Using latent heat of water evaporation to cool the culture medium for high.bench strawberry culture. Acta Hort. 708:393-396.
  3. Ikeda, T., K. Yamazaki, H. Kumakura, and H. Hamamoto. 2007. Effect of cooling of medium on fruit set in high.bench strawberry culture. HortScience 42:88-90.
  4. Jang, B.C., Y.P. Hong, and J.C. Chun. 1992. Effect of root zone temperature in hydroponics on plant growth and nutrient uptake in vegetable crops. J. Kor. Soc. Soil Sci. Fert. 25:242-248 (in Korean).
  5. Jun, H.J., J.G Hwang, M.J. Son, and D.J. Choi. 2008. Effect of root zone temperature on root and shoot growth of strawberry. J. Bio-Env. Con. 17:14-19 (in Korean).
  6. Lee, J.H., O.K. Kwon, and Y,H. Park. 1999. Cooling efficiency and growth of tomato as effected by root zone cooling methods in summer season. Proceeding of Bio-Env. Control. 8(2):130-133 (in Korean).
  7. Matuoka, T. and H. Suhardiyanto. 1992. Thermal and flowing aspects of growing petty tomato in cooled NFT solution during summer. Envrion. Control in Biol. 30:119-125. https://doi.org/10.2525/ecb1963.30.119
  8. Rynk, R. and F. Green. 1985. Greenhouse root zone soil cooling. ASAE paper No. 85-4532.
  9. Udagawa, Y., T. Ito, and K. Gomi. 1991. Effects of root temperature on the absorption of water and mineral nutrients by strawberry plants 'Reiko' grown hydroponically. J. Japan. Soc. Hort. Sci. 59:711-717 (in Japanese).
  10. Wiel, A.V.S. 1984. Results of soil cooling with well water. Venlo Experimental Gardens 39(30):38-41.