理化因子对龙血树柴胡种子萌发的影响

本研究以龙血树柴胡（Bupleurum dracaenoides Huan C.Wang，Z.R.He&H.Sun）的种子为材料，采用不同温度、不同浓度赤霉素、不同化学试剂以及紫外线照射和微波辐射等方式处理后，统计其发芽率、发芽势、发芽指数和发芽时间等指标。结果表明：龙血树柴胡种子萌发最适温度为20℃；100 mg/L的GA₃、0.5％的KMnO₄和3％的H₂O₂处理均能促进其种子萌发，但不能使种子萌发和出苗时间提前；25 s微波辐射处理可大幅提高种子发芽率；紫外线照射处理种子0.5 h，萌发效果最佳，但随照射时间的延长对种子萌发则有不同程度的抑制。

Effects of physical and chemical factors on seed germination of Bupleurum dracaenoides

In this paper,the effects of different treatments on Bupleurum dracaenoides Huan C.Wang,Z.R.He&H.Sun seed germination were studied.Results showed that the optimum germination temperature for B.dracaenoides was 20℃.Treatment with 100 mg/L of GA₃,0.5% KMnO₄,and 3% H₂O₂ improved seed germination,but did not advance seed germination and emergence time.Microwave radiation significantly improved the seed germination rate,with 25 s found to be the optimal radiation time.The most effective ultraviolet radiation treatment time for seed germination was 0.5 h,with a germination rate of 81%.When the ultraviolet radiation time was gradually increased,the germination potential of seeds was inhibited to different degrees.Thus,optimal treatment to maximize B.dracaenoides seed germination was to soak seeds in 100 mg/L of GA₃ for 12 h at a temperature of 20℃.