1, cold storage preservation. After harvesting the fresh mushrooms, they are put into baskets and baskets and covered with multi-layered wet gauze or sacks. In the shade, cylinders are placed, a small amount of fresh water is contained in the cylinders, a wooden frame is placed on the water, and the baskets are placed in the baskets. On the wooden frame, the cylinder opening is closed with a film. Dormancy preservation. After harvesting, put it in a room at 25°C or higher for 3 hours to 5 hours to allow it to breathe vigorously, and then let it rest in the cold storage at around 0°C for about 12 hours. The preservation period at about 20°C is about 4 days to 5 days. Keep ice fresh. 2. Modified atmosphere preservation This method is to artificially control the environment's temperature, humidity and gas composition and other factors to achieve the purpose of preservation. Simple modified atmosphere preservation. Fresh mushrooms such as shiitake mushrooms, and Agaricus bisporus are stored in air-conditioned bags containing 1% to 2% of oxygen, 40% of carbon dioxide, and 58% to 59% of nitrogen, and can be stored for 8 days at 20°C. Bags are fresh. The silicone rubber is embedded in the wall of the plastic bag in proportion to form a “silicon window†fresh-keeping bag with freshness preservation. The plastic bag can rely on the "silicon window" to automatically adjust the ratio of oxygen and carbon dioxide in the bag. In order to achieve the purpose of safe storage of fresh mushrooms. 3, radiation preservation radiation treatment can effectively reduce the deterioration of fresh mushrooms, receive better preservation effect. Pleurotus radiata preservation. Irradiated with Cobalt 60 rays, Pleurotus ostreatus was irradiated at a dosage of 50,000 larvae to 100,000 larvae. Stored at 0°C, the shape of the fresh mushroom was better maintained for 7 days to 10 days. Straw mushroom radiation preservation. Cobalt-60 rays were used to treat straw-shaped mushrooms in paper-plastic bags. The radiation dose was 80,000 rads to 120,000 rads. Fresh-keeping was performed at 14°C to 16°C for 2 days to 3 days, and the commercial characters were good. 4, chemical preservation Chemical preservation is the use of chemical substances to inhibit the respiratory intensity of edible fungi, and to prevent the activity of spoilage microorganisms. Salt soaking treatment. After immersing the fresh mushrooms in 0.6% saline for about 10 minutes, they are drained and stored in a plastic bag. From 10°C to 25°C, the mushrooms turn bright white after 4 to 6 hours. Can keep fresh for 3 days to 5 days. Sodium metabisulfite spray. The mushroom body was sprayed with a 0.15% sodium metabisulfite aqueous solution to make it evenly affixed with the liquid, and stored at 15° C. to 20° C. for 5 days to 8 days. Than long preservation. Freshwater is soaked in fresh water for a period of 10 minutes at a ratio of 0.001% to 0.1%, and stored at 5°C to 22°C for 5 days to 8 days.
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