This paper analyses the effects of the atmospheric carbon dioxide (CO 2) concentration increase on canopy temperature, evapotranspiration rate, and soil moisture distribution in root zone of the spring wheat, based on the data measured in the artificial climate houses during 1994～1995. The results show that the canopy temperature increased by 1 4～2 7℃ with the doubling of CO 2 concentration under sufficient soil water supply, but it increased only by 0 7～2 0℃ in soil water deficit condition. The avera...