Ginkgo biloba harvesting and storage
2024-09-05 04:00:51
I. Harvesting of Ginkgo biloba 1. Harvest time: In late September, ginkgo biloba outer seed coat has changed from greenish green to orange or greenish brown, and it is softer by hand. The surface of the outer seed coat is covered with a layer of white fruit powder. "A small amount of mature seeds naturally drop fruit, and the seed coat has been fully boned. This is the harvest time of Ginkgo biloba. 2. Harvesting methods: Ginkgo biloba trees, scattered trees, timber trees, and fruit trees are used for ginkgo trees. Because the trees are tall, they are usually shaken with bamboo poles, or they are hooked with hooks to catch the side branches. When hitting ginkgo twigs with bamboo sticks, it is best to avoid falling branches and leaves and affecting tree growth. Dwarf ginkgo dense planting garden, low body, generally can be picked directly from the tree to collect. Second, the storage of ginkgo 1, peeling: The ginkgo harvested together, the thickness of not more than 30cm is appropriate, covered with wet grass. After 2-3 days of stacking, the seed coat will rot. This can be used to lightly step on the foot, remove the seed coat with a wooden stick, and with a handkerchief. Because ginkgo biloba exocarp contains various chemical substances such as alcohol, phenol, and acid, it causes pruritus to many people's skin, and shows dermatitis, blisters and other allergic reactions. 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. If the residence time is too long, the unextracted outer seed coat will pollute the white seed coat and make the seed coat lose luster and reduce the quality of ginkgo. The bleaching liquid is configured by: 0.5 kg of bleaching powder is placed in 5-7 kg warm water, filtered, and then diluted with 40-50 kg of fresh water. For every 1 kg of bleached powder, 1000 kg of ginkgo biloba with the outer seed coat removed can be bleached. The bleaching time is about 5-6 minutes. After removing the ginkgo, 0.5 kg of bleaching powder is added to the solution, and 100 kg of ginkgo can be bleached. After 5-6 consecutive times, the bleach solution is additionally configured. After the ginkgo is poured into the solution, it should be agitated immediately until the bone of the seed coat becomes white. Then rinse it several times with clean water until no traces of the drug are left on the fruit surface. The containers used for bleaching are mainly ceramic tanks and cement tanks, and ironwork is prohibited. 3, dry: After rinsing ginkgo, can be directly on the indoor or outdoor ventilation dry. During the dry process, it should be turned to prevent yellowing or mildew in the seed coat. 3. Storage of ginkgo biloba Ginkgo biloba can be stored for about one year under low temperature and humid conditions. The hardening rate of seeds is less than 10%. If the humidity is high and the air is dry, the hardening rate exceeds 80%, basically losing its commodity value. Regardless of the method of storage, the fruits for storage must be fully mature, the moisture content must not exceed 20%, and the shell of the young fruit must be removed. The method generally has the following three types: 1. Refrigerated Ginkgo biloba fruit is placed in a sterilized sack or bamboo larvae in a cold storage at 1°C-3°C, sprayed once every 10-15 days, and maintained at a humidity of 50%. During the period of regular inspection and turning, such as the humidity in the cold storage at 2 °C, 5-6 months ginkgo fruit is still fresh and white, storage time can be over one year. 2, sand method: Select a cool indoor, after laying a layer of 10cm on the ground after the wet sand, spread on the wet sand 10cm thick ginkgo, and then spread 5cm of wet sand, so you can shop multiple layers, but the total The height does not exceed 60cm. Keep wet during storage, this method can be stored for 3-5 months. 3, the water method: The ginkgo immersed in a clear water tank or water tank, pay attention to changing the water often during storage, this method of storage for up to 4-5 months. China Agricultural Network Editor
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