A comparison of methods for drying seeds: vacuum freeze-drier versus silica gel

文献类型： 外文期刊

第一作者： Hu, XR

作者： Hu, XR;Zhang, YL;Hu, CL;Tao, M;Chen, SP

作者机构：

关键词： seed moisture content;freeze drying;silica gel;seed drying;lipid;barley;oat;rice;amaranth;rape;rice bean;sesame

期刊名称：SEED SCIENCE RESEARCH （ 影响因子：2.25； 五年影响因子：2.5 ）

ISSN： 0960-2585

年卷期： 1998 年 8 卷

页码：

收录情况： SCI

摘要： The water content at which seeds are stored is one of the most important factors determining storage life. Procedures for achieving the proper water content have not been fully described. The purpose of this study was to compare the efficiency of two methods commonly used in seed genebanks: vacuum freeze drying and drying over desiccants. Efficiency was evaluated in terms of the water contents that could be obtained, the speed at which seeds could be dried, the incidence of damage to seeds during drying and the cost. Seeds of eight crop species [barley (Hordeum vulgare), rice (Oryza sativa, Japonica type), oat (Avena sativa), kenaf (Hibiscus cannabinus), sesame (Sesamum indicum), rape (Brassica campestris), amaranth (Amaranthus tricolor) and rice bean (Phaseolus calcaratus)] were dried from ambient conditions of about 20 degrees C and 80% RH using a freeze-drier or silica gel as a desiccant. Water content of different species at the onset of the experiment and after freeze drying or drying over silica gel was an inverse function of the lipid content. Drying to low water contents had no measurable effect on germination percentage. Drying rates using silica gel or a freeze-drier were comparable, but lower water contents could be obtained using silica gel; also, silica gel was readily available and the daily rental fees made the cost of freeze drying prohibitive, thus drying using silica gel was the preferred method.

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