赤霉素浸种对白藤种子萌发特性的影响

白藤是中国热带、南亚热带森林中重要的伴生藤本和非木质森林资源。为探究白藤种子萌发的最佳处理，采用赤霉素（GA₃）浸种对白藤种子发芽特性进行研究。结果表明：发芽率以50 mg/L的GA₃溶液浸种处理最高（91.82%），该处理能提高白藤种子发芽率；发芽势和发芽指数均以400 mg/L GA₃溶液浸种处理最高（83.18%，16.67），20 mg/L GA₃溶液浸种处理最低（50.65%，11.50）。建议采用GA₃溶液浸种与催芽技术相结合，以提高白藤种子发芽率、发芽势和发芽指数。

Effects of Seed Soaking with Gibberellin (GA3) on Germination of Calamus tetradactylus

Calamus tetradactylus is an important associated vine and non-timber forest resource in tropical and southern subtropical forests of China. To explore the best treatment for seed germination of C. tetradactylus, the seeds are soaked in GA₃ to study their germination characteristics. The results show that the seeds soaked in GA₃ solution with a concentration of 50 mg/L has the highest germination rate (91.82%), which could increase the germination rate of C. tetradactylus seeds. The highest germination potential and germination index are 83.18% and 16.67 found in the soaking treatment of 400 mg/L GA₃ solution, and the lowest ones are 50.65% and11.50 found in 20 mg/L GA₃ solution, respectively. Soaking seeds in GA₃ and applying the technique of germination both can bring out good results. It is proposed that the combination of GA₃ solution soaking and germination techniques should be used to improve the germination rate, germination potential and germination index of C. tetradactylus seeds.