[challenge] the level of the water level of the cultivation box can be easily adjusted, cultivation of various attributes of the plant Advantageously, to provide a siphon structure of aquaponics system. hollow of fitting insertion member 51 is fitted to the bottom of the A cultivation box, fitted connecting pipe at the bottom of the insertion member 51 is fixed, the connecting pipe is contact the aquaculture box, of the tube 54 plurality of radial penetration grooves 541 are provided in the lower peripheral surface is positioned to be attached to the upper end outside the periphery of the insertion member 51 the lower end of the tube 54 is fitted, inside height Shirube-ryu-kan 55 pipe body 54 with being slidably received in a direction, are positioned inserted into the insertion member 51 fit the bottom of Shirube-ryu-kan 55, the lid 56 is attached to the upper surface of the tube 54, the outer peripheral surface of the tube 54 the adjustment cylinder 57 is slidably applied to the height direction.BACKGROUND 1【課題】栽培ボックスの水位の高低を簡単に調整でき、さまざまな属性の植物の栽培に有利な、アクアポニックスシステムのサイフォン構造体を提供すること。【解決手段】栽培ボックスの底部に中空の嵌挿部材51が嵌挿され、嵌挿部材51の下部に接続管が固定され、接続管が養殖ボックスに連絡され、管体54の周面下部に複数の径方向穿通溝541が設けられ、管体54の下端が嵌挿部材51の上端部外周囲に取り付けられて位置決めされ、導流管55が管体54の内部に高さ方向へ摺動可能に収容されると共に、導流管55の下部が嵌挿部材51内に挿入されて位置決めされ、蓋体56が管体54の上面に取り付けられ、管体54の外周面に調整筒体57が高さ方向へ摺動可能に被着される。【選択図】図1
