北京地区流苏及鸡麻种子的休眠与萌发研究

按A.W.Crocker与L.V.Borton(1959)提出的概念,凡是在苗圃条件下,犹如在自然条件下成熟后的第2个春季来临之前不出苗的种子,通称为二年种子(two years seed)9]。鸡麻和流苏属两年种子的范畴。实验表明,第1年秋(11月底)种子经处理后砂藏,第2年春(4月初)种子在砂藏中少量发芽,播入地里后第3年春出苗。相比之下经酸蚀处理加催芽剂的种子出苗率最高,其次为酸蚀种子,对照种子出苗率最低。

Studies on Seed Dormancy and Seed Germination of Chionathus Retusa and Rhodotypos Scandens in Beijing

According to the conception brought forward by Crocker and Borton(1959),two-year seed is usually the seed with no seedling emergence before second spring coming after its matutity in nursery under natural condition\.Seeds of Chionanthus retusa and Rhodotypos scandens belong to two-year seed.This research showed that seeds were stored in sands after treatment in the first autumn(late November),and then,a few seeds germinaed in sands in the second spring(early April)and seedlings emerged in the third spring after sowing in field.Compared with the seedling emergence rate of the untreated seeds.that of seeds treated with both acid corrosion and germinating agent was the highest,and that of seeds treated with acid corrosion was the higher.