Chemical preservation of edible fungi
The chemical preservation of bacteria has the advantages of simple method, low cost and high degree of preservation.
Sodium chloride (salt) fresh-keeping freshly collected Pleurotus ostreatus and Pleurotus ostreatus are soaked in 0.6% salt water for about 10 minutes, drained and stored in plastic bags, which can be kept fresh for 5-8 days.
The fresh-keeping of sodium pyrosulfite puts the newly harvested flat mushroom on the clean cement floor, sprays 0.15% sodium pyrosulfite aqueous solution to the mushroom body, and turns the mushroom body while spraying so that it can be sprayed evenly. After spraying, put it in a plastic bag, seal it immediately and store it in a cool place. It can be kept fresh for 8 days at 10 ℃ ~ 25 ℃. Rinse with clean water when eating.
Rice soup film fresh-keeping used in rice soup, add 1% soda or 5% baking soda, cool to room temperature. Soak the fresh mushrooms in the lye of rice soup, remove them after 5 minutes and place them in a cool and dry place. At this time, a layer of rice soup film is formed on the surface of mushrooms, which can be isolated from the air and kept fresh for 3 days.
After ascorbic acid preservation of Flammulina velutipes, Lentinus edodes, straw mushrooms, etc., 0.1% ascorbic acid solution was sprayed on fresh mushrooms and put into non-iron containers, which could be kept fresh for 3 to 5 days, and its freshness and color remained basically unchanged.
The mixed solution of sodium chloride and calcium chloride was prepared with 0.2% sodium chloride and 0.1% calcium chloride to keep fresh. Soak the freshly harvested fresh mushrooms in the mixture, cover with a bamboo stick and add a heavy substance to soak the mushroom body below the liquid level for 30 minutes. The fresh mushrooms can be kept fresh for about 5 days at 15 ℃ ~ 25 ℃ and more than 10 days at 5 ℃ ~ 10 ℃.
Ascorbic acid and citric acid mixed fresh-keeping solution 0.05% ascorbic acid and 0.02% citric acid were mixed into a mixed fresh-keeping solution. Soak the fresh mushrooms in the fresh-keeping solution for 10 minutes, remove and drain, and seal them in plastic bags.
Bijiu (B9) is a plant growth retarder. Soak the fresh mushrooms in 0.1% Bijiu aqueous solution for 10 minutes, drain, bag and seal, keep fresh at 5 ℃ ~ 25 ℃, and keep fresh for more than 15 days. Suitable for mushroom, mushroom, Pleurotus ostreatus, Flammulina velutipes and other fungi fresh-keeping.
The fresh straw mushroom was packed in a plastic box and immersed in wheat rice stone water and kept fresh at low temperature below 0 ℃ for a shelf life of up to 70 days. And the content of amino acid is not different from that of fresh mushroom, and the color and taste are better.
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Seedling raising techniques of sycamore in North China
Sycamore, also known as Firmianasimplex, is a deciduous tree of the genus sycamore of the sycamore family, with an oval crown, erect trunk, bright green and smooth bark, shady green leaves, strong adaptability and rapid growth, and is often planted as street trees and courtyards. At present, it is recognized by more and more people, and it has high promotion value and good market prospect. Now the techniques of sowing and raising seedlings of sycamore are introduced as follows. 1 seed collection and preparation of 15-30-year-old ones with strong growth, straight stem shape and free of diseases and insect pests
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Brown spot of edible fungus
Damage to crops: edible fungus damage symptoms: do not infect the mycelium, only infect the fruiting body, but can grow along the mycelium to form a gray tissue mass with dry texture. The infected buds stopped differentiation; after infection, the cap became smaller, the stalk thickened and browned, forming malformed mushrooms; after the fruiting body was infected in the middle and later stage, many needle-shaped and irregular brown spots were produced on the cap, and gradually expanded into gray-white depressions. Diseased mushrooms often peel off or peel off the surface, do not rot, no odor. The course of disease was about 14 days. Classification attribute: Wheel branch
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