CROP GROWTH STATE DETERMINATION METHOD, GROWTH METHOD, CROP GROWTH DEVICE, AND PLANT FACTORY

摘要

Provided is a crop growth state determination method by which it is possible to determine in real time the growth state of crops with ease by simple equipment even in narrow spaces such as plant factories. The present invention is a method in which seeds or seedlings of a crop (2) are planted with gaps therebetween on a planting board (1) arranged indoors, artificial light is radiated from above the planting board (1) to grow the crop (2), and the growth state of the crop (2) is determined concurrently thereto, wherein an upper surface (1a) of the planting board (1) is formed in advance to have a different reflectance of light than the crop (2), illumination light is radiated towards the planting board (1) over time, and the growth state of the crop (2) is determined by measuring the illuminance of the reflected light and observing the change therein over time.