Study on Breaking the Seed Dormancy and Stimulating the Seed Germination for Cercis chinensis

In this paper,the methods of breaking the seed dormancy and stimulating the seed germination for Cercis chinensis were studied. The results showed that the seed dormancy of this species could be broken through corrosion with high concentrated H2SO4 for 30 min and then with stratification in 13～17 ℃ for 20～30 d. The optimal germination results were obtained through culturing the seeds in darkness under 20 ℃ at night and 30 ℃ in daytime.The germination rate,the survival rate of seedlings,the germination index,the vitality index and the average total length of stem and root per individual were respectively 82%,80%,9.41,73.78 and 7.92 cm under these conditions,and those were respectively 90%,83%,9.09,71.0 and 8.81 cm if the seeds were soaked in solution of gibberellin for 24 h.