PROBLEM TO BE SOLVED: To provide plant cultivation systems, apparatus, and methods for full-year and simultaneously producing various kinds of plants, such as leaf vegetables, fruit vegetables, head formation vegetables, and pulse, without causing damage from repeated cultivation, by circulating a homogeneous nutrient solution.SOLUTION: The present invention is characterized by supplying a modified air obtained by modifying air so as to be a condition suitable for making a dissolved oxygen concentration of a homogeneous nutrient solution in a cultivation tank to a given concentration, to a homogeneous nutrient solution flowing inside of the cultivation tank each of which holds a plant, at a given speed, from a vicinity of a bacterium colonization portion, at a given temperature, and at a flow rate required for allowing a homogeneous nutrient solution to be the given concentration.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2018,JPO&INPIT【課題】単質の養液を循環させて、葉菜類、果菜類、結球野菜類及び豆類などといったあらゆる品目の植物を、連作障害を発生させずに通年で同時に生産するための植物栽培システム、装置及び方法を提供する。【解決手段】各々が植物を保持する栽培槽の内部を所定速度で流れる単質養液に、栽培槽の単質養液の溶存酸素濃度を所定濃度にするのに適した状態になるように空気を改質した改質空気を、所定温度にして、単質養液を前記所定濃度にするのに必要な流量で、バクテリア定着部の近傍から供給するようにしたことを特徴とする。【選択図】図2
