我省甜菜种子生产一向是利用窖藏母根进行的。用这种方法生产种子成本高,繁殖速度低,不利于甜菜生产发展。陇南地区的成县,位于秦岭以南,嘉陵江上游,年平均温度12℃,一月平均温度-0.9℃(1961—70年资料),适于甜菜露地越冬采种。我们于1964—65年,1976—77年,1977—78年进行了三次试验。一、材料和方法:1964—65年试验:品种是波四号(PZHR_4),分三期播种,时间是 Beet seed production in our province has always been carried out using cellar mother roots. In this way, the cost of producing seeds is high, the propagation rate is low, which is not conducive to the development of sugar beet production. Long County, located in the south of the Qinling Mountains, the upper reaches of Jialing River, the annual average temperature of 12 ℃, the average January temperature -0.9 ℃ (1961-70 years of data), suitable for winter planting sugar beet field. We conducted three experiments in 1964-65, 1976-77 and 1977-78. First, the material and methods: 1964-65 test: Variety is wave four (PZHR_4), sowing in three phases, the time is