Improvement of stomatal conductance models of rice under water saving irrigation treatment

In order to investigate the response relation model of stomatal conductance of rice leaves and related factors under water saving irrigation treatment, the field experiment was conducted in Kunshan experimental station of the State Key Laboratory of Hohai University in 2006. According to the observed data, the response relation of different factors and stomatal conductance of rice was analyzed. Leaf-air temperature difference was introduced to improve the original models, and two types of representative models were compared as well. The results indicated that the improved model taken into account of leaf-air temperature difference under the water saving irrigation condition had superior interpretive simulation ability than the original one. The improved stomatal conductance model by Jarvis had better simulation results than the one improved by Leuning-Ball. The improved Jarvis stomatal conductance model is recommended under water saving irrigation treatment.