不同浸种措施对紫萼(Hosta ventricosa)种子萌发的影响

目的]研究不同浸种措施对紫萼种子萌发的影响.方法]采用连续浸种（包括不同温度与不同时间的处理）和间歇浸种2种方式对紫萼种子进行浸种处理,观察各处理浸种后发芽情况,测定发芽率、发芽势和发芽指数.结果]紫萼种子的适宜浸种温度为15℃,其发芽率、发芽势和发芽指数分别比CK增加6.58％、42.86％和22.30％;紫萼种子的适宜浸种时间为18 h,其发芽率、发芽势和发芽指数分别比CK增加10.53％、9.52％和2.70％;与间歇浸种相比,连续浸种发芽率、发芽势和发芽指数分别减少3.90％、33.33％、18.30％,间歇浸种以间歇浸种1h的发芽率、发芽势和发芽指数最高.结论]紫萼种子萌发适宜的浸种温度和浸种时间分别为15℃和18 h.间歇浸种较之连续浸种更能提高紫萼种子的发芽率、发芽势和发芽指数,且以间歇浸种1h对紫萼种子的萌发最有利.

Effects of Different Seed Soaking Treatments on Seed Germination of Hosta ventricosa

Objective ] The research aimed to study the effects of different seed soaking treatments on the seed germination of Hosta ventrico-sa. Method] The seeds of Hosta ventricosa treated by continuous soaking including different soaking temperature and different soaking time oftreatment and intermittent soaking. The germination of Hosta ventricosa was observed and the germination percentage, germination potential andgermination index after each treatment were tested. Result] The appropriate soaking temperature for Hosta ventricosa was t5 ℃. The germi-nation percentage, germination potential and germination index increased by 6.58%, 42.86% and 22.30% compared with CK. The appro-priate soaking time for Hosta ventricosa was 18 h, whose germination percentage, germination potential and germination index increased by10. 53%, 9.52% and 2.70% as compared with CK. The germination percentage, germination potential and germination index of continuoussoaking decreased by 3.90%, 33.33% and 18.30% compared with intermittent soaking. And the germination percentage, germination poten-tial and germination index were the highest when the seeds treated by 1 h intermittent soaking. Conclusion] The optimum soaking temperaturefor the seeds of Hosta ventricosa was 15 ℃and the optimum soaking time for the seeds was 18 h. Seed soaking by intermittent soaking wasmore effective to enhance germination percentage, germination potential and germination index compared with that of continuous soaking, and1 h intermittent was the most effective to increase the germination of Hosta ventricosa.