To sum up these data,we see that tendencies of changes betweenstructure and function of leaf blades of different levels are uniform. The structure and function of ear leaf are better than that of otherleaves.

• 综上所述,玉米不同叶位叶片的结构与功能的变化趋势是一致的,中部果穗叶片优于其它叶位。