Korean Journal of Agricultural Science (농업과학연구)

Institute of Agricultural Science, CNU (충남대학교 농업과학연구소)
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Selection of appropriate nutrient solution for simultaneous hydroponics of three leafy vegetables (Brassicaceae)

  • Young Hwi, Ahn (Graduate school of Bio-AI Convergence, Chungnam National University) ;
  • Seung Won, Noh (PlanTFarm Co., Ltd., AgT research institute) ;
  • Sung Jin, Kim (Department of Horticultural Science, Chungnam National University) ;
  • Jong Seok, Park (Department of Horticultural Science, Chungnam National University)
  • Received : 2022.06.17
  • Accepted : 2022.08.23
  • Published : 2022.09.01
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Abstract

This study investigated which nutrient solution is suitable for growth and secondary metabolite contents when three different vegetable plants are grown simultaneously in one hydroponic cultivation bed. Seeds of pak choi (Brassica compestris L. ssp chinsensis), red mustard (Brassica juncea L.), and arugula (Eruca sativa Mill.) were sown in the shape of a triangle in three places on rockwool cubes. The rockwool cubes were placed in semi deepflow technique (semi-DFT) hydroponic systems in a rooftop greenhouse after three weeks of growth as seedlings then cultivated with four different nutrient solutions, Korea Horticultural Experiment Station (KHE), Hoagland, Otsuka-A, and Yamazaki, at the rooftop greenhouse for two weeks. The leaf area of pak choi cultivated in Otsuka-A was the largest but SPAD values, leaf area, and fresh weight of arugula were highest with KHE treatment. The total glucosinolate (GSL) content of pak choi was 151.7% higher in KHE than in Hoagland, and there was no significant difference in Yamazaki and Otsuka-A treatments. The total GSL content of red mustard was 34.6 μmol·g-1 in Hoagland, and it was 32.6% higher in Hoagland than in Yamazaki. Total GSL content of arugula was 57.5% higher in Yamazaki and Hoagland nutrients than in KHE and Otsuka-A nutrients solutions. The total GSL content of three plants grown with KHE was 40.7% higher than with Yamazaki, and the other nutrient solutions did not show significant differences. Therefore, KHE nutrient solution is considered suitable for nutrient solution composition for the cultivation of three different Brassicaceae crops in a single hydroponic cultivation system.

Keywords

Acknowledgement

본 연구는 2022년도 정부 산업통상자원부의 재원으로 한국에너지기술평가원의 지원을 받아 수행되었음(20212020800050, 다중 분산발전 기반의 옥상온실형 스마트 그린빌딩 융복합 시스템 개발 및 실증).

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