The invention provides a layered optical measuring method of a
fruit tree vertical structure and a device. Firstly, the ratio of
photon flux densities of the fruit trees to environmental
photon flux densities can be calculated by
photon sensors arranged at different horizontal
layers and aiming to different incident directions of
sunlight and arranged at equal intervals in a line on different positions on the same horizontal
layers, and therefore the incident
light transmission rates on any photon positions can be acquired respectively; and then the incident
light transmission rates and leaf angle distribution
extinction coefficient are input in a light
distribution model, and the leaf area indexes of the fruit trees on any photon positions are output; and finally by using a spatial interpolation method, based on the leaf area indexes, the leaf area distribution results on different horizontal
layers are acquired, and therefore the leaf area distribution result of the
fruit tree vertical structure can be acquired. The invention is advantageous in that based on the leaf area distribution result of the
fruit tree vertical structure, the optimized assessment of the optical distribution and the optical
utilization rate of the fruit
tree structure is carried out, and therefore the scientific data support can be provided for fruit tree trimming or the fruit tree
shape optimization.