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Detailed Explanation of the Low-Altitude Substitute-Material Cultivation Method for Gastrodia elata (Part One)
Gastrodia elata is a rare and precious traditional Chinese medicine. In the past it was gathered from the wild, growing in mountain forests above 500 m in altitude, and was very scarce and difficult to dig up; today it faces extinction. The development of artificial cultivation of Gastrodia elata has saved this precious species, but technically it still cannot break away from cultivation in high-altitude areas, and the raw material cannot be separated from log segments (oak). This makes Gastrodia elata cultivation greatly limited by region. Second, it is limited by the felling of forest resources. These two major drawbacks have long plagued the development of Gastrodia elata, and it has never been possible to achieve modern
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Key Harvesting and Processing Techniques for Angelica sinensis (Danggui) (Part One)
(1) Harvesting For direct-sown plants, dig in mid-to-late October of the second year; for seedlings raised in a nursery and then transplanted, dig in mid-to-late October of the same year, when the plants have withered and turned yellow. Digging too early results in roots that are not plump and solid, with low yield and poor quality; digging too late means the soil has already frozen, making digging difficult and prone to breaking the roots. Before harvesting, first cut off the above-ground stems and leaves and sun-dry them for 3-5 days, so that the roots become fuller and more solid; then carefully dig out the entire root. (2) Processing After harvesting, angelica sinensis must not be piled up. First clean off the soil, choose a high, dry, well-ventilated spot, spread the roots out to dry until the roots become soft, or sort them
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Detailed Explanation of the Biological Characteristics of Angelica sinensis (Part One)
Angelica sinensis seeds lose their germination rate after being stored at room temperature for 1 year, but can be stored for more than 3 years under low-temperature dry conditions. Mature seeds can germinate and grow under suitable conditions of moisture, temperature, oxygen, etc. Seed germination goes through three processes: (1) The water absorption and swelling process. The components that make up Angelica sinensis seeds, such as starch, fat, protein, and cellulose, are all hydrophilic colloids, which exist in a gel state under dry conditions. When the seeds absorb water, water penetrates into the colloidal network structure inside the seeds, causing the gel state to become a sol state, and the volume increases accordingly. This process is a physicochemical phenomenon called the seed water absorption and swelling process.
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