PROBLEM TO BE SOLVED: To provide a hydroponic device for root crops and plants with long roots capable of solve problems in which though it is required to stimulate roots and make an underground part deep so as to cultivate root crops with hydroponics, soil is not used in the hydroponics, roots and seedlings cannot be supported if deepening the root part, and sowing seeds and stimulation cannot be carried out.SOLUTION: In an intermittence siphon culture medium tank 1, a cylindrical material is vertically placed, cotton-like substance, sand or granular plastic, instead of soil, is put into the cylindrical material. A culture medium is poured from an upper part of the intermittence siphon culture medium tank or an intermittence siphon draining device 3, water is flown into a culture medium pipe 5, and water is accumulated in all intermittence siphon culture medium tanks with gravity. When reaching a prescribed water level, the intermittence siphon culture medium tanks are actuated to drain thereafter the drain is completely stopped. Repeating supplying and draining, stimulation to roots and raising crops can be allowed.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2016,JPO&INPIT【課題】水耕栽培で根菜類を育てるには、根への刺激及び地中部分を深くする必要がある。しかしながら、根の部分を深くすると水耕栽培では土を使用しない為、根や苗を支えられず、種を蒔く事もできず、刺激も与える事が出来なかった。根菜類や根の長い植物の為の水耕栽培装置を提供する。【解決手段】間欠式サイフォン培養液水槽1は、筒状の物を縦に置きその中に吸水性の無い綿状の物もしくは、砂や粒状のプラスチックを入れる事でそれらが、土の代わりとなる。培養液を間欠式サイフォン培養液水槽もしくは間欠式サイフォン排水装置3の上部から注ぎ込むと下部の培養液管5に流れ込み、重力の影響にて全ての間欠式サイフォン培養液水槽が、ほぼ均等に溜まり始め、一定の水位となったら、間欠式サイフォン排水装置が作動し排水が行われ、その後完全に排水を止める。この給排水を繰返す事で根への刺激等を与え、成長へと導く事が出来る。【選択図】図2
