４０种阔叶树树冠的外、中、内层同龄叶中，均以外层叶的气孔密度最高，其次为中层叶，内层叶气孔密度最低。新银合欢和马尖相思幼苗在高光照强度下所形成的叶气孔密度最高，中等光照者次之，低光照者最低。在蓝光照射下形成的叶气孔密度最高，其次为红光照射者，自然漫射光下最低。这说明光照强度和光波长对气孔密度有深刻影响。 The stomatal density of the outer leaves in the outer, middle and inner leaves of the 40 kinds of broad-leaved tree crowns was the highest, followed by the middle leaves, and the stomatal density of the inner leaves was the lowest. New Acacia and horse top Acacia seedlings under high light intensity formed the highest leaf stomatal density, followed by medium light, low light the lowest. The density of leaf stomata formed under the irradiation of blue light was the highest, followed by that of red light, the lowest under natural stray light. This shows that light intensity and light wavelength have a profound impact on stomatal density.