현장농수산연구지 (Journal of Practical Agriculture & Fisheries Research)

국립한국농수산대학교 교육개발센터 (Korea National University of Agriculture and Fisheries)
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상추 양액재배 시 탄산수 엽면시비가 광합성, 기공전도, 내서성, 생육에 미치는 영향

The Effect of Photosynthesis, Stomatal Conductivity, Thermotolerance and Growth on Foliar Fertilization of Carbonated Water at Lettuce Hydroponic Cultivation

  • 우영회 (국립한국농수산대학 원예환경시스템학과) ;
  • 김동억 (국립한국농수산대학 교양공통) ;
  • 이종원 (국립한국농수산대학 원예환경시스템학과)
  • Woo, Y.H. (Department of Horticulture Environment System, Korea National College of Agriculture and Fisheries) ;
  • Kim, D.E. (Korea National College of Agriculture and Fisheries) ;
  • Lee, J.W. (Department of Horticulture Environment System, Korea National College of Agriculture and Fisheries)
  • 투고 : 2019.04.03
  • 심사 : 2019.05.30
  • 발행 : 2019.06.28
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초록

상추 양액 재배 시 탄산수 엽면시비는 탄산수의 이산화탄소 농도가 높을수록 광합성률, 기공전도도가 높았으며, 내서성이 향상되었다. 상추 생육은 탄산수의 이산화탄소 농도가 높을수록 좋았으나, 이산화탄소 농도가 700 ppm, 500 ppm 에서는 tip-burn 발생률이 높아 수량은 300 ppm, 대조구가 700 ppm, 500 ppm 보다 많았다. 본 연구 조건하에서 탄산수 엽면시비에 의한 고온 한계 시점을 분석하기 위하여 기온 처리별 FO를 조사한 결과 무처리구에는 32℃, 300 ppm은 33℃, 500 ppm은 34℃, 700 ppm은 36℃이었다. 이 결과를 보면 탄산수 엽면시비는 작물의 고온 한계 온도를 최고 약 4 ℃정도 높이므로 내서성이 향상된 것으로 판단되었다. 또한 탄산수의 이산화탄소 농도가 높을수록 항산효소 SOD(superoxide dismutase) 활성이 높았다.

Foliar fertilization of carbonated water during lettuce hydroponic cultivation was increased photosynthetic rate and stomatal conductance as higher carbon dioxide concentration of carbonated water The higher the carbon dioxide concentration in the carbonated water was better growth of lettuce. However, the carbon dioxide concentration of 500 ppm and 700 ppm in the carbonated water was increased the tip-burn occurrence, and the yield was higher in the 300 ppm. the carbon dioxide concentration of 300 ppm in the carbonated water was lower in the fresh weight but increased yield resulted in the lower of the tip-burn occurrence The high temperature limits for growth were 32℃ in the control, 33℃ in the 300ppm and 34℃ in the 500 ppm according to analyze chlorophyll fluorescent Fo. The high temperature tolerance in lettuce increased approximately 4℃ by foliar fertilization treatments of carbonated water under this experiment conditions. Also the activity of SOD(superoxide dismutase), the antioxidant enzyme, was higher with high carbon dioxide concentration of the carbonated water.

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