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青阳参(Cynanchum otophyllum)种子在11月成熟时有休眠习性。收获后将其种子种植在自然温室内,到第二年的春天种子才会萌发,且大多数种子在3月28至4月4日间萌发,这期间的日平均最高和最低温度分别为19.0℃和9.9℃。层积能有效地打破青阳参种子的休眠,休眠种子通过大约1周的层积便能萌发。种子在有光的条件下层积1周后转移到25/15℃的黑暗条件下萌发率可达到75.4%。青阳参种子不论在有光的条件下还是在黑暗环境中层积2～3周后转入30/20和25/15℃进行变温处理,其萌发率最低能达到66.4%,而转入20/10℃变温处理其萌发率最多只能达到20.1%,但若层积6周,即便在20/10℃变温处理的情况下其萌发率也可以达到65.3%以上。
Cynanchum otophyllum seeds have dormancy during maturity in November. After harvesting, the seeds are planted in a natural greenhouse and the seeds germinate in the second year of spring, and most of the seeds germinate between March 28 and April 4, during which the average daily maximum and minimum temperatures are 19.0 ° C and 9.9 ° C. Stratification can effectively break the dormancy of the seeds of Chingyang ginseng, and the dormant seeds can germinate through the lamination of about one week. The seeds germinated under dark conditions with a light condition for 1 week and then transferred to 25/15 ° C with a germination rate of 75.4%. The seeds of Qingyang ginseng transferred to 30/20 and 25/15 ℃ for 2 ~ 3 weeks under light or dark conditions, the lowest germination rate could reach 66.4% The highest germination rate could reach 20.1% when the temperature was 10 ℃, but the germination rate could reach 65.3% even when the temperature was 20/10 ℃ for 6 weeks.