Influences of seed sources and germination temperature on germination percentage of Lespedeza bicolor Turcz

The Lespedeza bicolor Turcz seeds came from three different places of origin were selected as research materials to investigate the influences of place of origin and germination temperature on seed germination,the results showed that there was no significant difference on seed germination index among places of origin,but seed germination rate and mean germination time were extremely significant among places of origin. The seeds from Maoershan,Heilongjiang had the highest germination rate but the longest mean germination time,the seeds from Jiaohe,Jilin had the lowest germination rate but the shortest mean germination time,as well as the germination rate and mean germination time of seeds from Zhalantun were moderate. There were significant difference on seed germination rate,germination index,and mean germination time under different germination temperature conditions. Seeds exhibited the highest germination rate under 15℃,the highest germination index under 20℃,and the shortest germination time under 25℃. However,seeds didn't germinated well under 30℃, the germination rate,germination index,and mean germination time were all the worst. There was no interaction on seed germination rate and germination index between place of origin and germination temperature,but the interaction was extremely significant on mean germination time between these two factors.