81级毕业生孙玉霞、杨昌庆参加此项工作。 叶面积是影响光合产量的重要因素。果树生长发育过程中,叶面积的动态变化规律或不同条件下的叶面积变化规律是制定合理技术措施的依据之一,也是果树生产和科研中常用的重要指标之一。有关果树叶面积的计算方法人们曾作了许多探讨,但以 81 graduates Sun Yuxia, Yang Changqing to participate in this work. Leaf area is an important factor affecting the photosynthetic yield. During the growth and development of fruit trees, the dynamic changes of leaf area or the changes of leaf area under different conditions are one of the bases for the formulation of reasonable technical measures, and are also one of the important indexes commonly used in fruit tree production and scientific research. There have been many discussions on how to calculate the leaf area of ​​fruit trees, but on the other hand,