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Effects of an Improved Side Vent on Yield of Oriental Melon and Temperature in Single-span Plastic Greenhouse with Roof Ventilation Fans

지붕 환기팬이 설치된 단동 플라스틱 온실에서 개선된 측창형태가 하우스 내 온도 및 참외 수량에 미치는 영향

  • Yu, In Ho (Protected Horticulture Research Institute, NIHHS, RDA) ;
  • Cho, Myeong Whan (Protected Horticulture Research Institute, NIHHS, RDA) ;
  • Ryu, Hee Ryong (Protected Horticulture Research Institute, NIHHS, RDA) ;
  • Shin, Young An (Protected Horticulture Research Institute, NIHHS, RDA)
  • 유인호 (국립원예특작과학원 시설원예연구소) ;
  • 조명환 (국립원예특작과학원 시설원예연구소) ;
  • 류희룡 (국립원예특작과학원 시설원예연구소) ;
  • 신영안 (국립원예특작과학원 시설원예연구소)
  • Received : 2017.09.08
  • Accepted : 2017.10.11
  • Published : 2017.10.31

Abstract

In this study, the method to attach plastic film on the side vent from inside of greenhouse for the entire length was developed as the way to make crops less stressful while uniformly getting outside air into the greenhouse when ventilating using roof ventilation fans at single-span plastic greenhouse for oriental melon in a low-temperature period. The plastic film was installed from ground to 10cm below from the height where side vent is fully opened. In order to verify that the improved side vent can improve greenhouse environment and fruit yield, it was compared with the control plot of conventional side vent. Both greenhouses were not ventilated until February 25th, 2017. Air temperature in both greenhouses exceeded $40^{\circ}C$ in mid February. Therefore, it is judged that the greenhouse should be ventilated from mid February. Air temperature in the control plot exceeded $30^{\circ}C$ from late April. Therefore, it is judged that the plastic film attached to the inside of side vent should be removed in late April, or in early May at the latest. Soil temperature in the treatment plot in the mid Aril exceeded $20^{\circ}C$, which is suitable for growth, while that in the control plot was still below $20^{\circ}C$. Soil temperature in the control plot finally exceeded $20^{\circ}C$ in late April. The consumption of electricity was 47.2 kWh in the treatment plot, and 48.3 kWh in the control plot, which was no significant difference. The marketable yield of oriental melon in the treatment plot was 5,094kg, which was 23.9% more than that in the control plot, 4,113kg. The marketable fruit ratio was 73.5% in the treatment plot, and that in the control plot was 73.9%, which was no significant difference.

본 연구에서는 저온기에 참외재배 단동 플라스틱 온실에서 지붕 환기팬을 이용하여 환기할 때 작물에 스트레스를 적게 주면서 바깥 공기를 하우스 내부로 균일하게 유입할 수 있는 방법으로 하우스 전체길이에 대해 측창안쪽부분에 비닐을 부착하는 방법을 개발하였다. 지면으로부터 측창이 최대한 열렸을 때 높이의 10cm 아래까지 비닐을 설치하였다. 측창 개선에 의한 온실 환경 개선 및 참외 수량증대 효과를 검증하기 위하여 개선 측창형태와 관행의 측창형태를 비교하였다. 2017년 2월 25일 까지는 두 시험구 모두 환기를 하지 않았는데, 2월 중순 하우스 내 기온이 $40^{\circ}C$를 넘어섰다. 따라서 2월 중순부터는 하우스 환기를 시작해야 할 것으로 판단된다. 대조구에서의 기온이 4월 하순부터 $30^{\circ}C$를 넘어섰다. 그러므로 측창 안쪽에 부착한 비닐을 4월 하순, 늦어도 5월 상순에는 제거해야 할 것으로 판단된다. 4월 중순에 처리구에서의 지온은 생육 적온 범위인 $20^{\circ}C$를 넘어선데 비해 대조구에서는 여전히 $20^{\circ}C$보다 낮게 나타났다. 4월 하순이 되어서야 대조구의 지온도 $20^{\circ}C$를 넘어서는 것으로 나타났다. 전기사용량은 처리구 47.2kWh, 대조구 48.3kWh로 처리 간에 큰 차이를 보이지 않았다. 처리구에서의 참외 상품수량은 5,094kg으로 대조구 4,113kg에 비해 23.9% 많았다. 상품과율은 처리구 73.5%, 대조구 73.9%로 차이가 없었다.

Keywords

References

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