关键词: 防风, 发芽率, 发芽势, 微量元素

Abstract: The germination rate and germination vigor of Saposhnikovia divaricata seeds are all lower. The phenomenon is mainly caused by the variations among individuals and species characteristics. Low germination rate is firstly expressed as low germination rate of individuals, germination rate of 15 strains S. divaricata in trial varies from 28.0% to 92.0%, and overall germination rate of seeds is so low. Because the relieve dormancy time and aging time of every seed are not synchronous, results in all of seeds do not simultaneously entered fastigium of seeds germination. The initial time and duration of seed germination are all beyond two weeks. The mixture of 5~50 mg·kg^-1 GA, 1~10 mg·kg^-1 6-BA, 1% KNO₃ and 3% H₂O₂ can remarkably enhance germination rate of dormancy seeds, among these influential factors, GA and 6BA can release dormancy of S. divaricata seeds, however, 1%KNO₃ and 3%H₂O do not express this effect. Trace elements such as 10~100 mg·kg^-1 Mn²⁺, 10 mg·kg^-1 Cu²⁺ and 1 mg·kg^-1 Mo, etc, can notably enhance germination rate of S. divaricata seeds. Hence, these trace elements were spurted into plants at green fruit period of S. divaricata, the germination rate of seeds is also increased. The green fruits were treated with GA and NAA, which also increase the germination rate of S. divaricata seeds.

Key words: Saposhnikovia divaricata, germination rate, germination vigor, trace elements