[Objective]In seed processing of sugar beet,polishing and seed soaking are usually required.To study the effects of polishing level,GA3 concentration and soaking time on sugar beet seed germination.[Methods]Five different polishing levels,five different GA3 concentrations and three different soaking times were set for sugar beet seeds.[Results]The results showed that,compared with the treatment under 0 mg/L GA3,soaking seeds of large(B)and medium(M)sugar beet in 100 mg/L GA3 for 8 hours,germination potential improved by 6.59％and 10.04％,respectively;and their germination rates improved by 6.19％and 9.56％,respectively.Concentrations of 100 and 200 mg/L GA3 reduced the average germination time of seeds of B and M,and GA3 accelerated seed germination.Soaking seeds in 100 mg/L GA3 for 8 hours leaded to an increase of 10.48％,5.51％and 88.12％in germination potential,germination rate and germination index,respectively,compared to those treated by 0 hours,with its germination rate significantly higher than that of those treated for 16 hours(P<0.05).A two-factor ANOVA of GA3 concentration and seed polishing,soaking time and seed polishing level showed that the two factors interact significantly to affect the main germination indicators of seeds.[Conclusion]Soaking B and M sugar beet seeds with larger particle sizes in 100 mg/L GA3 for 8 hours had the best effect on seed germination.
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