Abstract:

Abstract Description of organ geometry is the center point for the 3-D modelling of maize plant. Leaf blade is the most important part for the building of maize plant architecture, and skeleton construction of leaf midrib is very important for precise descriptions of leaf blade architecture. In this paper, we adopted a method for dividing leaf midrib into segments, then calculating points for each bending arc according to the curvature of each small segment, and acquiring the characteristic points list that describing shape of leaf midrib. In order to obtain the 3-D coordinate of maize leaf midrib, field experiment was conducted and 3-D coordinates of 36 plants were collected with 3-D digitzer. Then, statistical analysis describing curvature data was done for all the leaves of the plant and the leaf shapes were classified intro five types according to the parameter values for each curvature data. Then 3-D reonstructions of maize plant stand was realized and comparison between measured and simulated leaf area were made with R2 equals to 0.9975.