PROBLEM TO BE SOLVED: To achieve a remarkably higher cultivation efficiency than before.SOLUTION: A nutrient liquid cultivation apparatus includes: a culture part for growing a plant in a nutrient liquid cultivation a nutrient liquid supply part for supplying a nutrient liquid to the culture part a control part for controlling a supply of the nutrient liquid from the nutrient liquid supply part to the culture part and a storage device for associating a kind of a nutrient and an absorption rate of the nutrient in a plant with every growth stage, and storing them. The control part finds the absorption rate of the nutrient from the storage device on the basis of a growth stage of the plant being cultured in the culture part, and determines the amount of the nutrient to be contained in the nutrient liquid to be supplied to the culture part.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】従来よりも著しく高い栽培効率を達成する。【解決手段】植物を養液栽培する培養部と、上記培養部に対して養液を供給する養液供給部と、上記養液供給部から上記培養部への養液の供給を制御する制御部と、栄養素の種類と植物における当該栄養素の吸収速度とを生育ステージ毎に関連づけて格納した記憶装置とを備え、上記制御部は、上記培養部にて栽培している植物の生育ステージに基づいて、上記記憶装置から上記栄養素の吸収速度を求め、上記培養部に供給する養液に含まれる上記栄養素の量を決定する。【選択図】図1
