Cultivation plant and use thereof

Claim 1

An irrigation system comprising several separate water accumulator bodies (1) which are buried at suitable places and at suitable mutual distances and on any level in relation to each other underneath a ground area (5) in which artificially irrigated plants are to grow, and in which each water accumulator comprises a closed container having top, bottom and side walls (11) and having at least one moisture distribution opening (12) in at least one of said top and side walls, and in which each water accumulator is filled with a porous water-soaking substrate (13), characterized in that the irrigation system comprises a main conduit (4) having means (7-10) for supply under pressure of at least one of air (9), water (8) and both water and air concurrently and having means for draining (10) said main conduit (4), in that each water accumulator (11) is spaced above and in direct fluid communication with said main conduit (4) by at least one upwardly extending connection conduit (2, 3) and a nozzle (15) at the end of said connection conduit provided within the mass of water soaking substrate (13) and having openings in substantially all directions for finely distributing said at least one of air, water, and both air and water mixture in the water soaking substrate (13), and in that each water accumulator has at least one top tube (23) extending from the interior of the water accumulator to a level at least slightly above the ground level (5), said at least one top tube (23) can be used for ventilation of the water accumulator, for blowing air and oxygen into the water accumulator from above, and for introducing a humidity sensor in the substrate (13) of the water accumulator.