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选取一支针栓与针管摩擦力小的注射器,在针咀(安针头处)上套上一段粗细适宜的乳胶管并用线扎紧管口,注射器及胶管内吸满清水。选一枝粗细适宜的枝叶繁茂的阔叶植物枝条(如泡桐、杨树等),插入灌满清水中的乳胶管的另一端(如果胶管内有少量气泡,需要推针栓排除全部气体),立即扎紧,并将胶管两端涂抹凡士林,以防漏水透气。把枝条及注射器固定在支架上,针栓的下端系一适量的重物,标记注射器内水面刻度。把上述装置(如图)于通风透光处(阳光不宜过强,否则叶片萎蔫影响蒸腾作用、)。一会可见,注射器内水分因叶面的蒸腾而
Select a syringes and syringes a small friction syringe, the needle nozzle (needle placement) on a suitable thickness of the latex tube and pipe tighten the mouth, syringes and hose filled with water. Select a suitable leafy branches of broad-leaved plants (such as Paulownia, poplar, etc.), insert the other end of the latex tube filled with water (if the hose has a small amount of bubbles, the need to push the needle to remove all the gas), immediately Tighten, and apply vaseline ends of the hose to prevent leaks and breathable. The branches and syringe fixed on the bracket, the lower end of the needle bolt is a suitable amount of weight, mark the syringe surface water mark. The above device (pictured) in a ventilated place (the sun should not be too strong, or leaves wilting affect transpiration). For a while, the moisture inside the syringe translates into foliage