Korean Journal of Agricultural Science (농업과학연구)

Institute of Agricultural Science, CNU (충남대학교 농업과학연구소)
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A field survey on roof ventilation system of single-span plastic greenhouse in cucurbitaceae vegetable cultivation

박과작물 재배 단동 비닐하우스의 천장 환기시스템 설치 실태조사

  • Yeo, Kyung-Hwan (Protected Horticulture Research Station, National Institute of Horticultural and Herbal Sciences, RDA) ;
  • Yu, In-Ho (Protected Horticulture Research Station, National Institute of Horticultural and Herbal Sciences, RDA) ;
  • Rhee, Han-Cheol (Protected Horticulture Research Station, National Institute of Horticultural and Herbal Sciences, RDA) ;
  • Cheong, Jae-Woan (Protected Horticulture Research Station, National Institute of Horticultural and Herbal Sciences, RDA) ;
  • Choi, Gyeong Lee (Protected Horticulture Research Station, National Institute of Horticultural and Herbal Sciences, RDA)
  • 여경환 (국립원예특작과학원 시설원예시험장) ;
  • 유인호 (국립원예특작과학원 시설원예시험장) ;
  • 이한철 (국립원예특작과학원 시설원예시험장) ;
  • 정재완 (국립원예특작과학원 시설원예시험장) ;
  • 최경이 (국립원예특작과학원 시설원예시험장)
  • Received : 2013.11.11
  • Accepted : 2013.12.31
  • Published : 2013.12.31
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Abstract

This research was conducted to obtain the basic information for establishment of standard guidelines in the design and installation of roof ventilation system in single-span plastic greenhouse. To achieve this, the greenhouse structure & characteristics, cultivation status, and ventilation system were investigated for single-span greenhouse with roof ventilation system cultivating the Cucurbitaceae vegetables, watermelon, cucumber, and oriental melon. Most of single-span watermelon greenhouse in Haman and Buyeo area were a hoop-style and the ventilation system in those greenhouses mostly consisted of two different types of 'roof vent (circular or chimney type) + side vent (hole) + fan' and 'roof vent (circular type) + side vent (hole or roll-up type)'. The diameter of circular and chimney-type vent was mostly 60cm and the average number of vents was 10.5 per a bay with vent spacing of average 6.75m. The ratio of roof vent area to floor area and side vent area in the single-span watermelon greenhouse with ventilation fan were 0.46% and 7.6%, respectively. The single-span cucumber greenhouse in Haman and Changnyeong area were a gable roof type, such as even span, half span, three quarter and the 70.6% of total investigated single-span greenhouses was equipped with a roof ventilation fan while 58.8% had a circulation fan inside the greenhouse. The ratios of roof vent area to floor area in the single-span cucumber greenhouse ranged from 0.61 to 0.96% and in the case of the square roof vent, were higher than that of the circular type vent. On average, the roof ventilation fan in single-span cucumber greenhouse was equipped with the power input of 210W and maximum air volume of $85.0m^3/min$, and the number of fans was 9.75 per a bay. The number of roof vent of single-span oriental melon greenhouse with only roll-up type side vent ranged from 8 to 21 (average 14.8), which was higher than that of other Cucurbitaceae vegetables while the vent number of the greenhouse with a roof ventilation fan was average 7 per a bay.

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References

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