Journal of Bio-Environment Control (생물환경조절학회지)

The Korean Society for Bio-Environment Control (한국생물환경조절학회)
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Effects of Heating Initiative Temperature and CO2 Fertilizing Concentration on the Growth and Yield of Summer Squash in a Greenhouse

온실 난방 개시온도와 CO2 시비 농도가 애호박의 생육과 수량에 미치는 영향

  • Goo, Hei Woong (Department of Horticulture, Mokpo National University) ;
  • Kim, Eun Ji (Department of Horticulture, Mokpo National University) ;
  • Na, Hae Yeong (Department of Horticulture, Mokpo National University) ;
  • Park, Kyoung Sub (Department of Horticulture, Mokpo National University)
  • Received : 2022.10.14
  • Accepted : 2022.10.26
  • Published : 2022.10.31
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Abstract

This study was conducted to find out the efficiency of heating initiative temperature and carbon dioxide fertilization in summer squash (Cucurbita moschata D.). The heating start temperature experiment was performed at 9℃, 12℃, and 15℃ using an electric heater and operated when the temperature was lower than the target temperature. The CO2 fertilization concentration experiment was performed from 7 to 12 with the control, 500 µmol·mol-1, and 800 µmol·mol-1 using liquefied carbon dioxide. Investigation items were plant height, stem diameter, number of leaves, leaf area, fresh weight, dry weight, also economic analysis was conducted by surveying only fruits exceeding 100 g. Photosynthesis was measured for the upper leaf position to calculate the saturation point according to the control. The photo saturation point was 587 µmol·m-2·s-1, and the CO2 saturation point was 702 µmol·mol-1. Amax values by carbon dioxide were 13.4, 17.8, 17.2, 19.6, and 17.5 µmolCO2·m-2·s-1 in the order of 9℃, 12℃, 15℃, 500 µmol·mol-1, and 800 µmol·mol-1. In the temperature experiment, 9℃ in growth did not grow normally and no fruiting was performed. 12℃ and 15℃ were higher than 9℃, but there was no significant difference in growth and production. The CO2 fertilization experiment showed no significant difference between the treatment in growth, but the productivity of 800 µmol·mol-1 was the best. Comprehensively, the heating initiative temperature of 15℃ was good for crop growth and production, but there is no significant difference from 12℃, so it is good to set the heating start temperature to 12℃ economically, and maintaining of 800 µmol·mol-1 is effective in increasing production.

본 연구는 난방 개시 온도와 CO2 시비의 효율을 알아보기 위해 수행되었다. 난방 개시 온도 실험은 9℃, 12℃, 15℃로 구분하여 목표 온도보다 낮아지면 전기 온열기구가 작동하게 하였다. CO2 시비 농도 실험은 액화탄산가스를 이용하여 무처리, 500µmol·mol-1, 800µmol·mol-1으로 7시부터 12시까지 처리하였다. 생육 특성으로 초장, 경경, 엽수, 엽면적, 생체중, 건물중을 조사하였고, 200g 넘는 과실만을 대상으로 수량을 조사하여 경제성 분석을 하였다. 상위엽에 대한 광합성 측정을 하여 처리에 따른 포화점을 산출하였다. 애호박의 광포화점은 587µmol·m-2·s-1이였고 CO2 포화점은 702µmol·mol-1 이였다. CO2에 의한 Amax값은 9℃, 12℃, 15℃, 500µmol·mol-1, 800µmol·mol-1 순으로 13.4, 17.8, 17.2, 19.6, 17.5µmol CO2·m-2·s-1이었다. 온도 실험에서 9℃는 생육과 착과가 정상적으로 이루어지지 않았다. 12℃와 15℃는 9℃보다 높았지만 생육과 생산에서 유의미한 차이를 보이지 않았다. CO2 농도 실험은 생육에서 처리구간 유의한 차이를 보이지 않았지만 800µmol·mol-1의 생산성이 가장 좋았다. 이상의 결과를 종합적으로 보면 난방 개시 온도는 15℃인 것은 작물 생육과 생산에는 좋았지만 12℃와 유의적인 차이가 없어 경제적 측면에서 난방 개시 온도를 12℃로 설정하는 것이 좋은 것으로 보이며, CO2 시비 농도 800µmol·mol-1를 유지하는 것이 생산량 증가에 효과적이었다.

Keywords

Acknowledgement

본 결과물은 농림축산식품부 및 과학기술정보통신부, 농촌진흥청의 재원으로 농림식품기술기획평가원과 재단법인 스마트팜연구개발사업단의 스마트팜다부처패키지혁신기술개발사업의 지원을 받아 연구되었음(421003-04, 421041-03).

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