森林耗水量的估算是在选择造林树种和研究森林的环境效能时经常需要的。最常用的方法是通过离体枝条短期内失重的方法来推算。称重法要求合用的扭力天平,工作量也比较大。现代的稳恒态气孔计法和热波法要有进口的价格昂贵的仪器,在我国还不普及。这里介绍一种虽比较古典,但简便易行的方法,每个林场都可以做到。经过我们试用,认为效果是令人满意的。一、方法简述将长度约70厘米的乳胶管,一端套在滴定管(碱管)下端,从另一端注入蒸馏水(如无 Estimating forest water consumption is often needed in selecting afforestation species and in studying the environmental performance of forests. The most common method is to calculate the short-term weight loss of isolated branches. Weighing method requires the use of torque balance, the workload is relatively large. The modern steady state stomatal method and the thermal wave method have imported expensive instruments, which is not yet universal in our country. Here is a classic but easy to use method that every farms can do. After our trial, that the effect is satisfactory. First, the method outlined will be about 70 cm in length latex tube, set at one end of the buret (alkali tube) at the bottom, from the other end into the distilled water (if no