在甜菜种子繁育工作中,有许多技术环节对保持品种特性、提高种子产质量产生极大的影响。本文就种株早期割苔与枝型构成和种子产量的关系,记述本院1977—1978年的试验结果。材料与方法两年的试验材料均为双丰八号原种母根。设三个处理:①、主苔高4—5厘米割苔,②、主苔高20—25厘米割苔(均掐除苔 In beet seed breeding work, there are many technical aspects to maintain the variety characteristics, improve the quality of seed production have a tremendous impact. In this paper, the early cercing species and the branch of the composition and the relationship between seed yield, record our hospital from 1977 to 1978 test results. Materials and methods Two years of test material are Shuangfeng eight original seedling root. Set three processing: ①, 4-5 cm long main moss cutting moss, ②, 20-25 cm main moss high moss (both pinch the addition to the moss