本文对甜菜叶片的生长特性进行了探讨 ,结果表明 :甜菜在营养生长期的叶片发生数为80片左右 ;15～35片叶的叶面积最大 ,且功能期最长 ,是甜菜的“基本功能叶片” ;叶的发生速度在叶丛期最快 ,到糖分积累期枯萎速度加快 ;将甜菜叶片分组 ,建立叶面积计算公式 ,为甜菜叶面积测定提供简便方法 In this paper, the growth characteristics of beet leaf were discussed. The results showed that: the number of leaf in sugar beet is about 80 in vegetative growth period; the leaf area in 15 ~ 35 leaf is the largest with the longest functional period, which is the basic function of beet Leaf "; the occurrence rate of leaf is the fastest in leaf plexus and the wilting speed is quicker in the period of sugar accumulation; the calculation formula of leaf area is established by grouping sugar beet leaves, which provides a simple method for the determination of sugarbeet leaf area