PROBLEM TO BE SOLVED: To provide a method and a device for cultivating plants, by supplying carbon dioxide nanobubbles to a cultivation liquid so as to promote plant photosynthesis. SOLUTION: This method for cultivating plants includes growing by arranging a plant seedling 20 on a cultivation bed 3 floatingly arranged on a cultivation liquid 2, and supplying carbon dioxide nanobubbles to the cultivation liquid 2 to let the plant seedling 20 absorb from the root part 22. As a result of the structure, carbon dioxide nanobubbles are taken into the cell from the plant root, and by synergy with the absorption of carbon dioxide from leaf pores, the absorption amount of carbon dioxide to chlorophyl is increased to promote plant photosynthesis. The device for cultivating plants includes a cultivation water tank 1 into which the cultivation liquid 2 is charged, the cultivation bed 3 supporting the plant seedling 20, and a nanobubble feeding device 10 receiving the supply of carbon dioxide to generate nanobubbles, and supplying carbon dioxide nanobubbles to the cultivation liquid 2. As a result of this, carbon dioxide nanobubbles are efficiently supplied to the cultivation liquid 2, and the absorption amount of carbon dioxide is increased to promote plant photosynthesis. COPYRIGHT: (C)2011,JPO&INPIT
