北沙参种子品质检验及质量标准研究

目的]提出北沙参种子的质量分级标准。方法]通过测定不同产地的北沙参种子净度、千粒重、含水量、发芽率,观察种子的外部特征,初步制订了北沙参种子的质量分级标准。结果]北沙参种子净度在90%以上,千粒重为22.38~24.09 g。烘干法测定北沙参种子含水量的标准方法是将种子磨碎后在130℃下烘干7 h。低温沙藏的北沙参种子发芽率最高,冷冻贮藏的次之,冷冻沙藏的最低。结论]一级北沙参种子褐色或黄褐色,净度≥95%,千粒重≥23.5 g,含水量≤12.0%,发芽率≥13.5%;二级北沙参种子黄褐色或黄棕色,净度90%~95%,千粒重22.5~23.5 g,含水量12.0%~14.0%,发芽率11.5%~13.5%;三级北沙参种子黄棕色或土黄色,净度≤90%,千粒重≤22.5 g,含水量14.0%~16.0%,发芽率≤11.5%。

Study on Seed Quality Detection and Quality Standard of Glehnia Littoralis Schmidt

Objective] The study was to propose the quality classification standard of Glehnia littoralis seed.Method]Through the detection on seed purity,1 000-grain weight,water content,germination rate of G.littoralis from different producing area,and observation on seed external characters,the primary seed quality classification standard of G.littoralis was preliminarily formulated.Result] The seed purity of G.littoralis was above 90%,and 1 000-grain weight was between 22.38-24.09 g.The standard method of drying method in detecting G.littoralis seed water content was to grind seed and dry it for 7 h under 130 ℃.The germination rate of G.littoralis seed by cold sand storage was highest,followed by that with freezing storage,the lowest was that by freezing sand storage.Conclusion] The first level G.littoralis seed was brown or mulatto,seed purity was above 95%,1 000-grain weight was above 23.5 g,water content was lower than 12.0%,germination rate was over 13.5%.The second level G.littoralis seed was mulatto or yellowish brown,seed purity was between 90%-95%,1 000-grain weight was between 22.5-23.5 g,water content was between 12.0%-14.0%,germination rate was between 11.5%-13.5%;the third level G.littoralis seed was yellowish brown or khaki,seed purity was below 90%,1 000-grain weight was below 22.5 g,water content was between 14.0%-16.0%,germination rate was below 11.5%.