Theoretical Simulation of Single Leaf’s Optical Characteristics

In this study using PROSPECT Model and in situ optical measurement of corn leaf, mesophyll structure parameter N of different growth phase as calculated. Based on this, given different chlorophyll and water content, corn leaf optical characteristics were modeled. It is found that in the visible region, chlorophyll dominates the optical characteristics, with the increasing of leaf chlorophyll content leaf reflectance and transmittance decrease and accordingly leaf absorptance increases while in the infrared region, water's effect prevails, with the increasing of water content leaf reflectance and transmittance decrease and accordingly leaf absorptance increases. At the same time, given fixed chlorophyll and water content, leaf optical characteristics varying with different mesophyll structure were simulated. It is found that with the increasing of N , leaf reflectance increases and reaches an asymptote while leaf transmittance decreases and reaches an asymptote also.