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甜菜种株倒伏是影响甜菜种子产量、质量的因素之一，种株倒伏可诱导花枝分生次数的增加，形成较多的无效种子。根据我所繁殖基地１９９６～２０００年的不完全统计，倒伏可使多倍体甜菜品种千粒重减少５～１４ｇ，发芽率降低１０％～３５％。引起倒伏的主要原因有：一、母根生
The beet seedling lodging is one of the factors that affect the yield and quality of beet seeds. The lodging of the seedlings can induce the increase of the number of the branchlets, resulting in more invalid seeds. According to the incomplete statistics of our breeding base from 1996 to 2000, lodging can reduce the weight of polyploid beet varieties by 1 5 ~ 14 g and the germination rate by 10% ~ 35%. The main causes of lodging are: First, the mother root