PROBLEM TO BE SOLVED: To provide hydroponics apparatus capable of lightening labor of work for installing a light-shielding member that constitutes a ground surface part.SOLUTION: A hydroponics apparatus 100 comprises: a cultivation tank 10 configured so as to receive a chunky nutrient accumulation part 3 of root vegetables an image sensor 7 or an infrared sensor 17 as a detection part which acquires information regarding the height of a stem 31 extending from the chunky nutrient accumulation part 3 a ground surface part 51 which includes a light-shielding member 45 which can be arranged around the stem 31, and forms an underground space 9A that includes underground parts of the root vegetables integrally with the cultivation tank 10 a drive part 5 which moves the light-shielding member 45 to an area around the stem 31 and a control part 6 which moves the light-shielding member 45 to the drive part 5 when it is specified that the value of the height of the stem 31 has become a predetermined value PV or more based on the information regarding the height of the stem 31 acquired by the detection part.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2016,JPO&INPIT【課題】地表面部を構成する遮光部材の設置のための作業の手間を軽減することができる水耕栽培装置を提供する。【解決手段】水耕栽培装置100は、根菜類の塊状栄養蓄積部3を受け入れるように構成された栽培槽10と、塊状栄養蓄積部3から伸びる茎31の高さに関する情報を取得する検出部としての画像センサ7または赤外線センサ17と、茎31の周囲に配置され得る遮光部材45を含み、栽培槽10と一体となって根菜類の地下部を内包する地下空間9Aを形成する地表面部51と、遮光部材45を茎31の周囲に移動させる駆動部5と、検出部によって取得された茎31の高さに関する情報に基づいて茎31の高さの値が所定値PV以上になっていることが特定された場合に、駆動部5に遮光部材45を移動させる制御部6と、を備えている。【選択図】図2
