摘要
通过不同温度下紫云英种子的发芽试验发现，紫云英的发芽率在20℃时达最大值88．3％，其发芽适宜温度范围为15-25℃，低温和高温都不利于种子的发芽。种子发芽指数随着温度的升高呈现先增加后降低的趋势，在20℃达最大值，与发芽率相一致。在25℃下，紫云英的胚芽和胚根均生长良好，种苗全重也达到最大值0．03029g。
The highest peak of germination rate of Astragalus sinicus was found at 20℃ （88.3%） and the proper temperature ranged from 15℃ to 25℃. Lower or higher temperature was harmful to the seed germination. With the temperature increasing,the germination index showed a trend that it increased at the beginning and then decreased. The germination index reached the maximum at 20℃（97.62） and its variation trend was as same as germination rate. The plumule and radicel of Astragalus sinicus developed quite well and the fresh weight of seedling reached its maximum at 25℃（0. 030 29 g/plant）.
出处
《草原与草坪》
CAS
2006年第2期56-58,共3页
Grassland and Turf
基金
农业部"物种资源保护"项目(070401)
关键词
紫云英
温度
发芽特性
Astragalus sinicus
temperature
germination characteristics
