东北地区刺楸种子解除休眠及催芽育苗的研究

通过不同试验材料、GA₃应用和变温层积催芽对比试验,对刺楸种子解除休眠进行研究的结果表明:鲜种+GA₃+(15℃,30 d;冷冻,90 d;-4～0℃,90 d)处理方法发芽率达到90.2%,出苗率达到81.5%;气干种温水(72 h)+GA₃+(13～18℃,90 d;0～4℃,90 d)处理方法发芽率达到76.3%,出苗率达到66.4%。采用鲜种进行变温催芽处理对刺楸种子发芽率、出苗率和1年生苗木质量提高具有显著作用(p<0.01和p<0.05)。研究表明,刺楸种子属于形态-生理休眠类型,采用鲜种+GA₃+变温层积催芽的综合处理方法能有效解除刺楸种子休眠。

Study on Seed Removing Dormancy and Germination Seedling Raising of Kalopauax septemlobus in Northeast China

Study on removing dormancy of Kalopauax septemlobus seeds,the comparative experiment of different test materials,GA3 application and variable temperature stratification for germination promotion was carried out.The results show that:The germination rate reached 90.2%,seedling emergence rate reached 81.5%by fresh seeds+GA3+(15℃,30 days;freezing,90 days;-4℃~0℃,90 days);and the germination rate reached 76.3%and seedling emergence rate reached 66.4%by air-dried seed warm water(72 h)+GA3+(13℃~18℃,90 d;0℃~4℃,90 d).The germination rate,seedling emergence rate and quality of one-year-old seedlings of Kalopauax septemlobus were significantly improved by using fresh seeds to accelerate germination at variable temperature(p<0.01 and p<0.05).Research shows,The seeds of Kalopauax septemlobus belong to the type of morphological-physiological dormancy,The comprehensive treatment of fresh seeds+GA3+Variable temperature stratification can effectively relieve the dormancy of Kalopauax septemlobus seeds.