PROBLEM TO BE SOLVED: To provide a method for diagnosing a plant nutritional state for promptly and accurately diagnosing a plant nutritional state, to provide a plant nutritional state diagnostic device, to provide a method for recovering a plant nutritional state for promptly and efficiently recovering a plant nutritional state, and to provide a plant nutritional state recovering device.SOLUTION: There are provided a method for recovering a plant nutritional state, which includes (a) the process of detecting the bioelectric potential of a plant in contrast frequency and at least one detection frequency, (b) the process of diagnosing the nutritional state of the plant from the bioelectric potential detected in the contrast frequency and the bioelectric potential detected in the detection frequency, and (c) the process of giving stimulation by flash light of frequency &le44 Hz to recover the nutritional state of the plant when diagnosing that the plant is in a poor nutritional state in the process (b), and a means of giving lacking nutrient, and the plant nutritional state recovering device.COPYRIGHT: (C)2011,JPO&INPIT【課題】植物の栄養状態を迅速且つ的確に診断することが可能な植物栄養状態診断方法、及び植物栄養状態診断装置、並びに、迅速且つ効果的に植物の栄養状態を回復させることが可能な植物栄養状態回復方法、及び植物栄養状態回復装置の提供。【解決手段】植物の栄養状態を回復させる方法であって、(a)対照用周波数、及び1つ以上の検出用周波数における、植物の生体電位を検出する工程と、(b)前記対照用周波数において検出された生体電位と、前記検出用周波数において検出された生体電位とから、該植物の栄養状態を診断する工程と、(c)前記工程(b)において栄養状態不良と診断された場合、周波数が44Hz以下の点滅光による刺激を付与し、該植物の栄養状態を回復させる工程と欠乏栄養分を付与する手段、を有することを特徴とする植物栄養状態回復方法および装置。【選択図】図4
