Abstract: With the deepening of plant life research,different eco-physiological models based on plant physiological and physical processes are developed step by step,and the eco-physiological model of plant canopy scale becomes one of the cores of ecosystem model.At present,big-leaf model,multilayer model,and two-leaf model of plant canopy scale are widely used,because these three models have ripe theoretical base,and successfully simulated the photosynthesis and transpiration of plant canopy.These models are all based on the model which combined photosynthesis,stomatal conductance and transpiration,and have their own characters.This paper introduced and compared the structures and characters of the three models,and discussed their applications,shortcomings,and development trends.

Key words: Nerium indicum, Oncumelania hupensis, Killing effect