PROBLEM TO BE SOLVED: To provide a fertilizer feeding device that can easily blend, store, and handle fertilizer, and can feed fertilizer components required for plant cultivation to a culture medium.SOLUTION: A fertilizer feeding device comprises: a liquid tank 1 which pools acidic liquid a fertilizer cartridge 2 capable of passing a liquid into which granulated bodies containing fertilizer components which can be eluted by acidic liquid is charged a liquid feed pump 3 which transports acidic liquid from the liquid tank 1 to the fertilizer cartridge 2 a first sensor 4 which detects a pH value and an EC value of effluent flown out from the fertilizer cartridge 2 and a controller 5 which controls the action of the liquid feed pump 3. The fertilizer cartridge 2 is constituted such that a plurality of types of granulated bodies containing fertilizer components different from each other are housed in an isolated state by types, and acidic liquid is fed by types of the granulated bodies, the controller 5 is constituted to be capable of controlling the liquid sending amount of acidic liquid to the fertilizer cartridge 2 by types of the granulated bodies on the basis of a detection value of the first sensor 4.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】肥料の配合、保管、及び取り扱いが容易であり、植物栽培に必要な肥料成分を培地に供給することができる肥料供給装置を提供する。【解決手段】酸性液を貯留する液タンク1と、酸性液によって溶出可能な肥料成分を含む造粒体が充填される通液可能な肥料カートリッジ2と、液タンク1から肥料カートリッジ2に酸性液を移送する送液ポンプ3と、肥料カートリッジ2から流出する流出液のpH値及びEC値を検出する第一センサ4と、送液ポンプ3の動作を制御する制御部5と、を備え、肥料カートリッジ2は、互いに異なる肥料成分を含む複数種の造粒体を種類毎に隔離した状態で収納し、造粒体の種類毎に酸性液が供給されるように構成されており、制御部5は、第一センサ4の検出値に基づいて、肥料カートリッジ2への酸性液の送液量を、造粒体の種類毎に制御可能に構成されている。【選択図】図1
