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What is the fresh-keeping principle for edible fungi? This article will help you understand it clearly
Fresh-keeping for edible fungi (theprincipleoffresh-keepingforediblefungi): Mushroom bodies separated from the culture substrate still have vitality, and living organisms have resistance to adverse external environments and microbial infection. However, the stronger the life activity, the faster the rate of freshness decline. Therefore, without destroying the normal physiological functions of the organism, by controlling various factors that affect the physiological and biochemical changes of fresh mushroom products, the life activity of the mushroom body can be kept as low as
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Many Methods for Keeping Edible Mushrooms Fresh: A Few Practical Tips for You
Edible mushrooms generally have a high moisture content, are rich in nutrients, have a tender texture, and undergo intense physiological and biochemical activity, so if they are not sold and processed promptly after harvest, their commercial quality will be seriously affected, causing considerable economic loss. To prevent losses when harvested edible mushrooms cannot be sold or processed in time, mushroom growers must master edible mushroom preservation techniques. Preserving edible mushrooms keeps the flavor of the fresh product basically unchanged, preserves its nutritional value to the greatest extent possible, and offers advantages such as easier storage, processing and transport.
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Detailed Guide to Making Edible Mushroom Fresh-keeping Bags
1. Materials: hypophosphorous acid (50% aqueous solution), aluminum silicate (with an alumina content of 28%), gauze bags. 2. Making: ① Prepare the fresh-keeping agent: mix 1 part hypophosphorous acid and 1.2 parts aluminum silicate evenly, dry with hot air (a hot air blower may be used), then grind and pulverize, and finally pass through a 200-mesh sieve to obtain the fresh-keeping agent. ② Bagging: put the required amount of fresh-keeping agent into gauze bags (dosage 0.2-2 grams/bag) and seal them to obtain edible mushroom fresh-keeping bags. ③ Storage: fresh-keeping bags or fresh-keeping agent not used temporarily should be sealed and stored away from light.
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What issues should be noted in the export processing of fresh-keeping shiitake mushrooms?
I. Raw material selection In the processing of fresh-keeping shiitake mushrooms, the first thing to note is the freshness of the raw materials, which is an important factor determining the quality of the finished fresh-keeping shiitake mushrooms. The raw materials must be fresh, and the color must be normal; secondly, the mushroom caps must be complete and round in shape, the stems must be intact, and the mushroom bodies must retain the graceful form of natural growth; the mushroom flesh must be thick, the edges of the caps must be neatly incurred, the partial veil unbroken or slightly open, and not fully opened; the cap diameter must be no less than 38 mm; and there must be no pests or diseases, off-odors, or soil impurities. II. Raw material handling and cold storage First,
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What are the key points for fresh-keeping processing of shiitake mushrooms for export?
I. Raw material selection The raw materials must be fresh and of normal color. The mushroom caps must be intact in shape, the stems must be complete and unblemished, and the mushrooms must retain their elegant form as when growing naturally. The flesh must be thick, the cap edges must be evenly inrolled, the partial veil must be unbroken or slightly open, and the caps must not have opened. The cap diameter must be no less than 38 mm. Free of pests and diseases, off-odors, and soil impurities. II. Raw material handling and cold storage 1. Precooling and moisture removal of raw materials To maintain good freshness and color of the raw materials, fresh mushrooms must be promptly placed in a cold store for precooling and temperature reduction after harvest. According to equipment performance and the moisture content of the fresh mushrooms, maintain an appropriate
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Practical Guide to Fresh-keeping and Processing Techniques for Shiitake Mushrooms
1. Drying equipment: Although shiitake drying equipment at home and abroad differs in form, scale and technical level, its principle is basically the same. Generally there are the following models: (1) forced circulation dryer; (2) forced ventilation parallel-flow dryer; (3) heat pump dryer. 2. Drying methods (1) Raw material handling Before drying, trim off the mushroom stalks or stem bases from the freshly picked mushrooms, remove impurities, and process after grading. Mushrooms picked on rainy days or with high moisture content should first be spread out to air-dry so that
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A Detailed Guide to Practical Techniques for Shiitake Mushroom Processing and Fresh-Keeping
When harvesting shiitake mushrooms, place them gently in plastic baskets without squeezing or deforming them, then remove impurities from the fruiting bodies, pick out damaged mushrooms, trim the base of the stems, and sort them according to cap size, thickness and moisture content, arranging them on bamboo blinds or reed mats in a ventilated place. They should be processed promptly; piling them together for a long time will reduce quality. 1. Drying shiitake mushrooms (1) Sun-drying: For mushrooms to be sun-dried, stop spraying water directly on the fruiting bodies 2-3 days before harvest to avoid excessive moisture content in the fresh mushrooms. Harvest promptly when the fruiting bodies are 70-80% mature, the partial veil has just broken, and the cap edges curl inward in the shape of a copper gong. It is best to harvest on a sunny day; after harvest, use stainless steel scissors to trim the stem base, sort according to cap size, thickness and moisture content, spread them gill-side up on reed mats or bamboo blinds, and place them in sunlight to dry. Generally, about 3 days of drying is needed to reach full dryness.
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What are the methods for keeping shiitake mushrooms fresh with sealed packaging and refrigeration?
There are many methods for keeping shiitake mushrooms fresh, including quick freezing, refrigeration, chemical treatment, controlled atmosphere, and microwaving. Shiitake mushrooms to be kept fresh by dehydration and refrigeration should stop being sprayed with water 10 hours before harvest and be harvested when they reach eight-tenths maturity. After harvest, select them and remove impurities, cut off the mushroom stems, grade them according to customer requirements, then place the shiitake mushrooms on a mat with the gills facing down and dry them in sunlight. In autumn and spring, dry them for 3-4 hours; in summer, dry them for 1-1.5 hours. After drying, the dehydration rate of the shiitake mushrooms is 25%-30%, that is, 100 kg of fresh shiitake mushrooms becomes 70-75 kg after drying. At this point, when pinched
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Detailed Explanation of Key Points of Oyster Mushroom Storage and Fresh-Keeping Techniques
Fresh oyster mushrooms have a high water content and tender, crisp tissue, making them extremely prone to damage. If stored improperly, they easily rot and deteriorate, causing losses to producers. Several storage methods for oyster mushrooms are introduced below: 1. Fresh storage: The storage time of fresh oyster mushrooms at room temperature is greatly affected by temperature and air humidity. When the room temperature is 3°C-5°C and the relative air humidity is around 80%, fresh mushrooms can be stored for one week. As temperature increases, humidity must also increase. When the quantity of mushrooms is small, the oyster mushrooms can be placed in a vat containing a small amount of cold water, and the vat opening sealed tightly; even if the temperature reaches 15°C-16°C, they can be kept fresh for about one week.
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Detailed Explanation of Soft-Packaging Quick-Freezing Fresh-Keeping Technology for Oyster Mushrooms
Oyster mushrooms have a tender and crisp texture, making them inconvenient to transport and store. Especially during high-temperature periods and peak harvest seasons, if the processing capacity at the place of origin cannot keep up, exporting becomes difficult, and the problem of "difficulty in selling mushrooms" often arises. Therefore, the problems of oyster mushroom sales, transportation, storage, and processing should be fundamentally solved. There are three main traditional methods for storing oyster mushrooms: First, processing them into salted mushrooms for export and domestic sale. However, from the perspective of domestic sales, due to the high salt content, they need to be soaked repeatedly many times before consumption, which is not only time-consuming and laborious, but they still taste too salty when eaten, and the flavor deteriorates, making it difficult for consumers to
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