| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydroponic device capable of forming a peripheral environment suitable for each of an underground part and an above-ground part in each of a light period and a dark period.SOLUTION: A hydroponic device 100 includes: a ground surface part 7 which separates an underground space 16 where an underground part of a plant 1 grows, and an above-ground space 26 where an above-ground part of the plant 1 grows; a cultivation tank 6 which encloses the underground space 16 together with the ground surface part 7 and stores a nutrient solution to be supplied to the plant 1; a light emitting part 5 which is controlled to the state of the light period for irradiating light to the plant 1 and the state of the dark period without irradiating light to the plant 1; an above-ground temperature detection part 8 which detects the temperature of the above-ground space 26; a ground temperature adjustment part 90 which adjusts the temperature of the above-ground space 26; and a control part 50 which controls the above-ground temperature adjustment part 90 on the basis of information of the temperature of the above-ground space 26 detected by the above-ground temperature detection part 8, while controlling the light emitting part 5. The control part 50 controls the above-ground temperature adjustment part 90 so that the temperature of the above-ground space 26 is low, as compared to the light period, in the dark period.SELECTED DRAWING: Figure 1 |
