| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus for a hydroponic cultivation sufficiently supplying air to a root part of a plant, preventing a root rot, contriving an increase of yield and making re-using of a liquid manure complete by making a liquid manure concentration constant, in a hydroponic cultivation. SOLUTION: This apparatus has a hydroponic cultivation floor 2 on an upper half part in a tank 1 having an opened upper part and a root-proofing sheet 3 which passes water but not passes a root on a below face of the culturing bed 2. On the other hand, a porous hollow body which a part of the surface or whole of the surface is covered with a water absorbing sheet is provided in a lower half part of the tank 1 in attaching to a rear face of the root- proofing sheet 3 and the supplied liquid manure is stagnated in the lower half part of the tank while having a liquid surface below a constant height, then a prescribed air layer 7 is provided below a rear face of the root-proofing sheet 3.
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