PROBLEM TO BE SOLVED: To provide a cultivation device which properly determines the amount of growth of a plant.SOLUTION: A cultivation device is configured to induce a plant by an induction string 81, and the cultivation device includes a plant measuring device which measures the size of the plant in a predetermined height region and which records data measured with time. The cultivation device also includes a growth amount determination device which determines the amount of growth of the plant on the basis of an increased amount of a measured data value when the value of the measured data recorded with time is increased, but which does not determine the amount of growth of the plant on the basis of a decreased amount of the measured data value when the value of the measured data recorded with time is decreased, and which performs control for determining the amount of growth of the plant by calculating the increased amount of a later measured data value with reference to the decreased amount of the measured data value.COPYRIGHT: (C)2015,JPO&INPIT【課題】 本発明は、植物の成長量を適正に判定することを課題とする。【解決手段】 誘引紐81により植物を誘引する構成とし、所定の高さ領域内での植物の大小を計測する植物計測装置を設け、植物計測装置が計測データを経時的に記録し、経時的に記録される計測データの値が増加したときは、計測データ値の増加量に基づいて植物の成長量を判定すると共に、経時的に記録される計測データの値が減少したときは、減少した計測データ値の減少量に基づいて植物の成長量を判定せずに、以降の計測データ値の増加量を前記減少した計測データ値を基準に演算して植物の成長量を判定する制御を実行する成長量判定装置を設けた栽培装置とした。【選択図】図3
