太陽光植物工場における農作物生産の品質管理

抄録

The speaking plant approach (SPA) is becoming an indispensable concept to maximize profit of agricultural production in current greenhouses. This concept is defines the optimal plant cultivation conditions should be achieved by monitoring the physiological status of the plants. Chlorophyll fluorescence imaging technique is useful to evaluate the photosynthetic functions of plant without touching. We developed a chlorophyll fluorescence imaging robot with the features of feasible design, automated simple operation and low-cost for implementation in commercial tomato production greenhouse. This system images chlorophyll fluorescence induction phenomenon, a dynamic change in chlorophyll fluorescence intensity induced by an excitation light under dark condition and analyses the shape of the induction curve, the time course of the chlorophyll fluorescence intensity during this phenomenon. We applied this robot to grasp a spatial distribution and daily fluctuation of photosynthetic function of hydroponically-cultivated tomato plants in a semi-commercial greenhouse. In addition, this robot also provide the information on the daily changes in stem elongation rate. Such high spatial and temporal resolution information is useful for the precise management of plant growth in greenhouse. The developed chlorophyll fluorescence imaging robot is expected to be implemented in commercial tomato production greenhouse in the near future.