Journal of Bio-Environment Control (생물환경조절학회지)

The Korean Society for Bio-Environment Control (한국생물환경조절학회)
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Effects of Temperature and Irrigation Intervals on Photosynthesis, Growth and Growth Analysis of Pot-grown Cucumber Seedlings

온도와 관수 주기가 오이 포트 묘의 광합성, 생육 및 생장 해석에 미치는 영향

  • Jin Hee An (Department of Agriculture and Industries, Kangwon National University Graduate School) ;
  • Eun Yong Choi (Department of Agricultural Science, Korea National Open University) ;
  • Yong Beom Lee (International Horticulture Institute) ;
  • Ki Young Choi (Division of Future Agriculture Convergence, Kangwon National University)
  • 안진희 (강원대학교 농산업학과 ) ;
  • 최은영 (한국방송통신대학교 농학과) ;
  • 이용범 (국제원예연구원 ) ;
  • 최기영 (강원대학교 미래농업융합학부 )
  • Received : 2022.05.25
  • Accepted : 2023.04.24
  • Published : 2023.04.30
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Abstract

This study was conducted in an indoor cultivation room and chamber where environmental control is possible to investigate the effect of temperature and irrigation interval on photosynthesis, growth and growth analysis of potted seedling cucumber. The light intensity (70 W·m-2) and humidity (65%) were set to be the same. The experimental treatments were six combinations of three different temperatures, 15/10℃, 25/20℃, and 35/25℃, and two irrigation intervals, 100 mL per day (S) and 200 mL every 2 days (L). The treatments were named 15S, 15L, 25S, 25L, 35S, and 35L. Seedlings at 0.5 cm in height were planted in pots (volume:1 L) filled with sandy loam and treated for 21 days. Photosynthesis, transpiration rate and stomatal conductance at 14 days after treatment were highest in 25S. These were higher in S treatments with a shorter irrigation interval than L treatments. Total amount of irrigation water was supplied evenly at 2 L, but the soil moisture content was highest at 15S and lowest at 25S > 15L > 25L, 35S and 35L in that order. Humidity showed a similar trend at 15/10℃ (61.1%) and 25/20℃ (67.2%), but it was as high at 35/25℃ (80.5%). Cucumber growth (plant height, leaf length, leaf width, chlorophyll content, leaf area, fresh weight and dry weight) on day 21 was the highest in 25S. Growth parameters were higher in S with shorter irrigation intervals. Yellow symptom of leaf was occurred in 89.9% at 35S and 35L, where the temperature was high. Relative growth rate (RGR) and specific leaf weight (SLA) were high at 25/20℃ (25S, 25L), RGR tended to be high in the S treatment, and SLA in the L treatment. Water use efficiency (WUE) was high in the order of 25S, 25L > 15S > 15L, 35S, and 35L. As a result of the above, the growth and WUE were high at the temperature of 25/20℃.

본 연구는 오이(Cucumis sativus L.)의 광합성, 생육 및 수분이용효율을 분석하고 생장해석을 통해 생육 온도와 관수 주기가 식물에 미치는 영향에 대해 알아보고자 환경 제어가 가능한 실내 재배상에서 광도(70W·m-2)와 상대습도(65%)를 동일하게 설정하여 수행하였다. 처리는 주/야간 온도(℃)를 15/10℃, 25/20℃및 35/25℃로 3처리하였고, 각 온도별 관수 주기를 1일 1회 100mL(S), 2일 1회 200mL(L)로 달리 공급하는 처리를 조합하여 총 6개(15S, 15L, 25S, 25L, 35S, 35L) 처리를 하였다. 초장이 0.5cm인 오이묘 '아시아 은천'을 양질사토로 충진한 1L 원형 포트에 정식하여 21일간 처리하였다. 처리 14일째 광합성, 증산율과 기공전도도는 25S에서 가장 높았고, 관수 주기가 짧은 S처리에서 L처리보다 높았다. 처리 기간 중 총 관수량이 2L로 동일하게 공급되었지만 토양함수율은 15S에서 가장 높았고 25S > 15L > 25L, 35S, 35L 순으로 낮았다. 상대습도는 15/10℃(61.1%)와 25/20℃(67.2%)는 비슷한 경향을 보였지만 35/25℃에서는 80.5%로 높았다. 21일째 오이 생육은 25S에서 가장 높았고, 초장, 생체중과 건물중은 관수 주기에 영향을 받았다. 잎끝황화 현상은 온도가 높았던35S, 35L에서 89.9% 발생하였다. 상대생장률(RGR)과 비엽중(SLA)은 25/20℃(25S, 25L)에서 높았고, RGR은 관수 주기가 짧은 S처리, SLA은 L처리에서 높은 경향을 보였다. 수분이용효율(WUE)은 25S, 25L > 15S > 15L, 35S, 35L 순으로 높았다. 이상의 결과 적온인 25/20℃에서 생육과 수분이용효율도 높았다. 그러나 35/25℃(35S, 35L) 처리에서는 토양 함수량이 낮았고, 잎끝 황화현상이 발생하였으며, 15/10℃(15S, 15L)에서 토양 함수율이 높고 광합성과 생장이 낮았다.

Keywords

Acknowledgement

본 결과물은 한국연구재단의 기본연구지원사업(과제번호: 2021R1F1A106428511)과 (재)스마트팜연구개발사업단의 스마트팜다부처패키지혁신기술개발사업(과제번호: 421009-04)의 지원을 받아 연구되었음.

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