通过多年田间试验，系统研究和分析了不同温型小麦叶片的气体交换等生理学特性。结果表明，不同温型小麦品种抽穗后叶片的净光合速率、蒸腾速率、气孔导度等生理特性表现出较明显的差异。其中冷型小麦品种的旗叶、倒二叶和倒三叶的平均净光合速率比暖型小麦品种分别高２７．６３％，４０．１２％和７０．７０％，平均蒸腾速率分别高２１．０１％，３１．５４％及２６．５０％，平均气孔导度分别高２１．０９％，３３．００％及１９．３８％． Through years of field experiments, the physiological characteristics of gas exchange in wheat leaves of different temperature types were systematically studied and analyzed. The results showed that there were obvious differences in the net photosynthetic rate, transpiration rate and stomatal conductance among different temperature wheat cultivars. The average net photosynthetic rate of flag leaf, inverted leaf and inverted leaf of cold type wheat was 27.63%, 40.12% and 70.70% respectively higher than that of warm wheat, and the average transpiration rate was 21% respectively. 01%, 31.54% and 26.50% respectively. The average stomatal conductance was 21.09%, 33.00% and 19.38% respectively.