Abstract: To evaluate the applicability of four common-used stomatal conductance models for winter wheat,parameters of two Ball-Berry models and two Jarvis models were determined using experimental data.Then the four models were validated and compared.Results showed that the correlation coefficients between predicted and observed stomatal conductance for Jarvis model 1,Jarvis model 2,Ball-Berry model 1 and Ball-Berry model 2 were 0.854,0.777,0.751,0.784,respectively.The corresponding root mean squared error(RMSE) for the four models were 0.149,0.247,0.183,0.169 mol·m-2·s-1,respectively.Based on these results,it was concluded that the prediction accuracy of the four models were in order of Jarvis model 1> Ball-Berry model 2>Ball-Berry model 1>Jarvis model 2.The results of this study were expected to provide references for simulation of field evapotranspiration,land surface process and ecosystem.

Key words: Winter wheat, Winter wheat, Yangmai 13, Stomatal conductance, Jarvis model, Ball-Berry model