germination percent
1.Several methods of breaking hard seeds were tested and the results showed that soakingseeds at 90℃ hot water for 30 minuts can break hard seed and increase germinationpercentage. After breaking hard seeds,the germination percent age(95.0%)of seedswith black testa was higher than that of seeds with blown testa(85.0%). The trialshowed that the differences in seed maturity brought abu the characters of testa,
2.Seed nuts of the local cultivar Kerman were stratified under 0-5℃ for 60 d,then they were soaked in GA(300 mg/L) for 6～8 h for germination acceleration. The rate of germination reached 75 percent.
3.2. The seed germination rate of different provenances of Toona sinensis was high. However, the rate of field germination rate was lower than seed germination rate and varied from 25.33 percent to 55.33 percent.
