选用气孔较大的植物,如泡桐、桑、蚕豆等,给予良好供水条件,并在光照下,促使气孔张开。在载玻片上滴1滴蒸馏水。用摄子撕取叶片下表皮一小片,浸入蒸馏水中,盖上盖玻片,立即在显微镜下观察,尽可能找开 Use larger stomatal plants such as paulownia, mulberry, broad bean, etc., to give good water supply conditions, and in the light, to promote stomatal opening. Drop a drop of distilled water on a glass slide. Take a small piece of the lower epidermis of the leaf with a photon, immerse it in distilled water, cover it with a cover glass, and immediately observe under a microscope and look for it as much as possible