甜菜的支根和侧根向四周伸展半径为50～60厘米,但上根向下延伸却可深达200～250厘米。这样强大的根系并不是一下子发育起来的,是随着生育期的延长不断扩展和伸长的。生育正常的甜菜,苗期根系较弱,仅可伸入土壤15厘米深,当甜菜出现两片真叶,主根仲入土壤30厘米处时,即开始发育侧根,大部分分布在5～10厘米范围内。甜 Sugar beet root and lateral roots to the surrounding radius of 50 to 60 cm, but the root extends down to deep but can reach 200 to 250 cm. Such a strong root system is not developed at once, is to expand and grow with the growth of the growing period. Fertile beets, the seedling root system is weak, only into the soil 15 cm deep, when the beet appear two true leaves, the root of the root Chung into the soil 30 cm at the beginning of the development of lateral roots, most of the distribution in 5 to 10 cm Range. sweet