Ginkgo biloba harvesting, peeling, grading and storage
I. Harvest of Ginkgo biloba (1) Harvest time: Beginning in late September, the ginkgo biloba outer seed coat has changed from greenish green to brown or greenish brown, and it is softer by hand. The surface of the outer seed coat is covered with a thin white “fruit powderâ€. It is the harvest time of Ginkgo biloba. (2) Harvesting methods: For ginkgo trees with isolated wood, scattered trees, timber trees, and fruit materials, because of the tall trees, they are usually shaken with bamboo poles, or hooked with a hook to catch the side branches. Ginkgo dwarf dense planting garden, low tree, generally can be harvested directly from the tree. Second, ginkgo peeling (1) Peeling: The collected Ginkgo biloba is piled together and the thickness is not more than 30 cm. It is appropriate to cover the wet grass and stack it for 2-3 days. The outer seed coat will rot. Use a wooden stick to tap and use hand spasm to remove the outer seed coat. Because ginkgo biloba exocarp contains various chemical substances such as alcohol, phenol, and acid, it can cause itching and dermatitis, blisters and other allergic reactions to many people's skin. Therefore, in the peeling operation, hands, feet, and skin should be avoided as much as possible. (2) Bleaching: After the ginkgo biloba outer seed coat is removed, it should be immediately bleached and rinsed in bleach solution. The long residence time will make the seed coat dull and reduce the quality of ginkgo. Bleach solution is prepared by: 0.5 kg of bleach on the 5-6 kg of warm water open, filtered residue, plus 40-50 kg of fresh water dilution. For every 1 kg of bleach, bleach 1000 kg of ginkgo to remove the seed coat. The bleaching time is about 5-6 minutes. After removing the ginkgo, 0.5 kg of bleaching powder is added to the solution to bleach 1,000 kg of ginkgo. After 5 to 6 consecutive times, the bleaching solution is additionally prepared. After the ginkgo is poured into the solution, it should be agitated immediately until the bone of the bone becomes white. Then rinse with water several times until no traces of herbs are left on the fruit surface. The container for bleaching is suitable for porcelain jars and cement tanks, and the ironware is disabled. (3) Dry skin: Ginkgo biloba after rinsing can be directly exposed to indoor or outdoor ventilation. During the dry process, it should be turned to prevent yellowing or mildew in the seed coat. Third, ginkgo grading Ginkgo grading standards for the acquisition: a level, not more than 360 per kilogram; two, 360-440 per kilogram; three, more than 440 per kilogram. At the same time requirements: full and full, shell white, dry and moderate, no stale fruit, no wind and fruit, no spot moldy, no floating fruit, no broken. IV. Storage of ginkgo Sand collection method: Choose a cool room, lay a layer of 10cm thick wet sand on the ground (not suitable for hand-kneading), lay 10cm thick ginkgo on top of the wet sand, and spread it to 5cm thick. Wet sand, so you can shop multiple layers, but the total height of not more than 60 cm is appropriate. Keep wet during storage, this method can be stored for 4-5 months.
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