Abstract:Our study shows that seed soaking in triacontanol, ammonium molybdate and gibberellin can promote the growth of P. corylifolia, reduce its premature flower and fruit drop, raise the fruit-bearing rate by 6.5~17.4%, and fruit-bearing number by 21.6~28.4%, so as to increase the yield per unit area by 31.5~34.8%. Seed soaking in aphthylacetic acid and boric acid does not give such a marked effect.