糖用甜菜(Beta Vulgaris L.)属于二年生作物,第一年主要进行营养生长,形成繁茂的叶丛和肥大的直根。甜菜肥大的直根是根的一种变态。在根的生长过程中,依次发生初生、次生、三生构造的变化,由于根构造的变化及三生维管束环数目的多少,与甜菜根的产量和含糖率有密切的关系,因此,研究甜菜根三生构造的形成与叶片生长的关系,从而根据叶片生长的状态判断 Sugar beet (Beta Vulgaris L.) is a biennial crop, the first year of vegetative growth, the formation of lush foliage and hypertrophy straight roots. Straight roots of beet hypertrophy is a metamorphosis of the root. In the process of root growth, the changes of primary, secondary and tertiary structures occur in turn. Because of the change of root structure and the number of vascular bundles, the yield and sugar content of beetroot are closely related , The relationship between the formation of the beet root and the growth of the leaves was studied, and the state of leaf growth was judged