PROBLEM TO BE SOLVED: To intend for improvement of energy efficiency by radiating only artificial light of a wavelength necessary especially for vegetable growth.SOLUTION: A method for raising plants includes: by means of a plant raising device which includes a raising space 2 and a liquid fertilizer tank 3a formed in a plant raising box body 1, a cultivation bed 4 arranged in the liquid fertilizer tank 3a, a medium 5 allowing to implant seeds and seedlings of plants (A) stored in many medium holes, a carbon dioxide gas supplying device 6 supplying carbon dioxide gas, a temperature setting device 7 setting the environment temperature, an artificial lighting device 8 radiating artificial light from the upper side of the raising space 2, and a control means 9 of each of the devices irradiating plants with artificial light of a light wavelength of 350-500 nm and a light wavelength of 600-750 nm at a luminous intensity that is stronger than that of another light wavelength with an artificial lighting device 8 and setting a luminous intensity ratio on artificial light of a light wavelength of 350-500 nm and a light wavelength of 600-750 nm so as to make the whole luminous intensity variable in a state of retaining the luminous intensity ratio.COPYRIGHT: (C)2014,JPO&INPIT【課題】野菜の生育に特に必要な波長の人工光のみを照射させエネルギー効率の向上を図るものである。【解決手段】植物育成函体1に形成した育成空間2と液体肥料槽3aと、液体肥料槽3aに配設された栽培床4と、多数の培地用穴に収納された植物Aの種や苗を植え付け可能な培地5と、炭酸ガスを供給する炭酸ガス供給装置6と、環境温度を設定する温度設定装置7と、育成空間2の上方から人工光を照射させる人工照明装置8と、各装置の制御手段9と、を備えた植物育成装置を用いて、人工照明装置8により光波長350~500nmと光波長600~750nmとの人工光を他の光波長より強い光度で照射し、光波長350~500nmと光波長600~750nmとの人工光に光度比を設定し、光度比を維持させた状態で全体の光度の可変をさせるものである。【選択図】 図1
