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在田间条件下，研究了生产上广泛应用的１７个玉米自交系的气孔阻力（ＲＳ）及其与光合速率（ＰＨ）、蒸腾速率（ＴＲ）的关系。主要结果是：（１）不同自交系之间ＲＳ具有显著的差异，相差最大可达２．３倍以上；（２）ＲＳ随生育进程的推延而增大；（３）ＲＳ同ＰＨ、ＴＲ及ＷＵＥ（叶片水分利用率）在玉米生长的主要阶段存在极显著的指数函数关系，而在某一特定的生育期则表现出极显著的直线关系；（４）ＲＳ与ＰＨ、ＴＲ、ＷＵＥ及Ｒ（呼吸速率）的相关度从大到小依次是ＴＲ＞ＰＨ＞ＷＵＥ＞Ｒ；（５）气孔阻力值拟可作为不同基因型的重要生理学特征之一。
Under field conditions, the stomatal resistance (RS) and its relationship with photosynthetic rate (PH) and transpiration rate (TR) of 17 maize inbred lines widely used in production were studied. The main results are as follows: (1) The RS between different inbred lines is significantly different, with a maximum difference of 2.3 times or more; (2) RS increases with the delay of the growth process; (3) RS is the same as PH, TR And WUE (leaf water use efficiency) had extremely significant exponential function in the main stages of corn growth, but showed a very significant linear relationship at a specific growth stage. (4) RS and PH, TR, WUE and The relativity of R (respiration rate) is in order of TR> PH> WUE> R; (5) The stomatal resistance can be regarded as one of the important physiological characteristics of different genotypes.