Most Chinese herbal medicines are propagated through seeds. Therefore, it is necessary to select seeds that are pure, pest free, large and heavy, and that have been properly stored and scientifically treated in order to ensure complete seeding. Herbal seeds are treated in the following ways: For seeds that are most likely to germinate, such as rhubarb, licorice root, windproof, Atractylodes, Alisma and cassia seed, soak in 12 to 24 with cold or warm water (40°C to 45°C). Hours after sowing. Seeds that are hard seed coats, contain glial or waxy, and have poor water absorption, such as seeds of Radix Astragali, Codonopsis, Eucommia, Astragalus, Andrographis paniculata, and Magnolia barbadensis, can be treated with mechanical damage, shelling, or with gibberellin. Other chemical agents and growth hormones are processed. The seed coat of Astragalus is impervious to water, and the seeds are crushed with stone until the seed coat color changes from brownish black to grayish brown and then sown. It is also possible to use fine sand to rub the seed coat with the sand when the seed coat shines. The old mature hard seeds can be soaked with a 70% to 80% sulfuric acid solution for 3 to 5 minutes, quickly removed and rinsed in running water for 30 minutes after sowing. For the ginseng, American ginseng, North Adenophora, Coptis, Schisandra, Aconitum, Phellodendron seeds to adopt low-temperature treatment methods, in order to break the seed dormancy and promote its germination. The American ginseng seeds are mixed in clean Xihe sand and maintained at a humidity of 7%. After being placed in a basement or room (10°C-15°C room temperature) for 60 days, the crack rate can reach over 80%, and the embryo can reach 4.15mm. In the low temperature 0 °C ~ 5 °C treatment for 120 days, through the physiological after-ripening stage, the germination rate of up to 80%.
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