S06 - Session P8 - Appropriate nutrient solution to optimize growth and glucosinolate content when Cultivating simultaneously several leafy vegetables at hydroponic systems

Authors: SunWoo Kim *, Younghwi Ahn, Seungwon Noh, Jongseok Park

In hydroponic system, only one plant was planted in a single cultivation in a hydroponics system. However, when plants with similar nutrient conditions are cultivated in one cultivation bed, several plants can be harvested at once and expected to higher yield and spatial utilization. Therefore this study aims to assess appropriate nutrient solution for plant growth and functional metabolite contents when cultivating 3 varieties in a single cultivation bed. The seeds of pak choi, red frill, arugula were sown at 1 cm depth and 8 cm intervals in the 10×10 cm rook wool cubes for 3 weeks. Then they were transplanted at deep-flow technique system (DFT) of the rooftop greenhouse and cultivated with Korea horticultural experiment site (KHE), Hoagland, Yamazaki, Otsuka nutrient solutions. Two weeks after transplant, leaf area of pak choi were largest at Otsuka nutrient solution but no significant difference was observed in pak choi, red frill fresh weight among 4 nutrient solutions. But leaf length, SPAD, leaf area and fresh weight of arugula was highest in plant grown with KHE nutrient solution. Total glucosinolate content was highest in arugula plants grown under Hoagland and Yamazaki nutrient solution and Hoagland nutrient solution also increased total glucosinolate content of red frill. However, total glucosinolate content of pak choi was highest in KHE nutrient solution and had significant difference compared to three nutrient solutions. This results will be able to suggest cultivation protocols that can produce various plants simultaneously under a hydroponic conditions and can suggest appropriate nutrient solution for pak choi, red frill, arugula plant growth and glucosinolate content.