PROBLEM TO BE SOLVED: To provide a hydroponic method and a hydroponic apparatus of plants which are capable of preventing a spindly growth phenomenon of plants in a seedling-raising period and cultivating high-quality plants.SOLUTION: A hydroponic apparatus 1 that performs hydroponics to plants in a seedling-raising period by using culture solution comprises: a water temperature measuring section 5 which measures water temperature of the culture solution； a water temperature adjusting section 6 which adjusts water temperature of the culture solution； and a control section 7 which controls the water temperature adjusting section 6 so as to bring the measured temperature that the water temperature measuring section 5 measured to a predetermined spindly growth suppressing water temperature and suppress spindly growth of the plants in a seedling-raising period.COPYRIGHT: (C)2015,JPO&INPIT【課題】育苗時における植物の徒長現象を防いで、品質の良い植物を栽培することができる植物の水耕栽培方法及び水耕栽培装置を提供する。【解決手段】育苗時の植物を培養液を用いて水耕栽培する水耕栽培装置１であって、前記培養液の水温を測定する水温測定部５と、前記培養液の水温を調整する水温調整部６と、前記水温測定部５の測定した測定温度が、予め定めた徒長抑制水温となるように前記水温調整部６を制御し、育苗時の前記植物の徒長を抑制する制御部７とを備える水耕栽培装置１。【選択図】図１
