PROBLEM TO BE SOLVED: To provide a hydroponics device for Japanese ginger where a simply structured horizontal cultivation table is used so as to horizontally support a cultivation tray even when the Japanese ginger grows large. SOLUTION: The hydroponics device for Japanese ginger has the following structure: a cultivation tray 1 for putting a culture medium 4 thereon is placed on longitudinal pipes 27 disposed on a horizontal cultivation table 26 in parallel at prescribed intervals; the cultivation tray 1 is made of foamed polystyrene, provided with side walls 6 along both side edges of a bottom plate 7; the upper surface of the bottom plate 7 is provided with side grooves 11 formed at both sides thereof and a center groove 12 formed midway; and the lower surface of the bottom plate 7 is provided with a lower surface recessed part 14 so as to lie between the side groove 11 and the center grooves 12; and side part ribs 17B are formed below the side grooves 11 and a center rib 17(A) is formed below the center groove 12 so as to form vertical ribs 17 the lower surfaces of which comprise flat ones each with a prescribed width. In the hydroponics device for Japanese ginger, the lower surface of the center rib 17(A) is put on the vertical pipes 27, and the lower surfaces of both side part ribs 17B are each put on a single piece of the vertical pipes 27 to dispose the cultivation tray 1 on the horizontal cultivation table 26. COPYRIGHT: (C)2007,JPO&INPIT
