In the history of China, there is a saying of "Northern Mushrooms of the South Mushroom". The southern mushroom refers to the "sweet mushroom" and the northern ear refers to the "black fungus". There are many aliases for black fungus, because it grows on the rot, it looks like a human ear, hence the name "wood ear"; because the taste is like chicken, it is also known as "chicken"; because it is inlaid with trees, like a cloud It is also known as the "cloud ear". Wuying black fungus is made from broad-leaved sawdust such as forest sorghum, which is in line with its natural attributes and is a natural gift. Compared with the southern products, the Wuying black fungus meat is thick and nutritious, rich in nutrients; the foam is elastic and rich in luster; it is round and delicate when eaten, and it is top grade in the national black fungus products.

Five battalion black fungus quality technical requirements (a) environmental conditions. It is required to choose a forest edge with sufficient sunshine, ventilation, and a large temperature difference as the ear field. (2) Cultivation management. 1. Production season: According to the ear season and production volume, the production time of the bacteria bag is arranged, and the production period of the bacteria bag is from October to the beginning of May. 2. Selection of strains: The black fungus strain No. 29, which is locally selected, produces the first, second and third grade strains according to the requirements of the production technical regulations. 3. Cultivation materials: The wood chips of eucalyptus and birch are preferred, and the non-contaminated wheat bran and soy flour are selected as accessories. 4. Bagging: The machine is uniformly packed with 17×33 polyethylene bags, which must be packed. 5. Sterilization: Sterilization at atmospheric pressure, reaching 100 OC for 8 hours. 6. Inoculation: After sterilization, it is cooled to below 30 OC and inoculated under aseptic conditions. 7. Culture: After inoculation, move into the culture chamber, keep the room temperature between 25 °C and 27 °C within 10 days, and then between 22 °C and 24 °C, avoid the light, ventilate twice a day, half an hour each time, 1 After the month, the bag temperature does not exceed 20 °C. 8. Ear management: The cultivation method is the imitation wild cultivation method under the forest, which requires 30 to 50 small mouths of black fungus bags. Clean up the weeds and branches of the placed place, and sterilize with lime powder to concentrate the bag and germination (1) germination: air temperature 15 ° C to 25 ° C, temperature difference between day and night 10 ° C, air relative humidity 85% to 90%, waiting The ear base is formed. (3) Picking and processing. 1. Picking: The ear piece is thick and just stretched out, and the ventral surface is not seen before the white spore powder is ejected. It should be harvested when the rain is fine and the ears are slightly dry. Take large and small, and unscrew it by hand to avoid bringing out the culture material. After sorting, timely sorting and drying, so that the water content does not exceed 13%. 2. Drying: Choose a place where ventilation is sunny. When the weather is clear and the light is sufficient, the fresh ears can be spread on the mat or nylon yarn that is placed off the ground and dried for 1 to 2 days. 3. Screening and packaging. (4) Quality characteristics. 1. Sensory quality: The ear of the wet ear is short, light brown, the veins are more prominent, the ear surface is smooth, the ear quality is brittle, and the drying rate is 7% to 10%. Dry ears are thick, stretched, shaped like human ears, dark brown in color, convex on the back, shiny short fluff, concave in the ventral surface, smooth surface or choroidal wrinkles. The blisters are soft and not rotten, they are crispy and not sloppy, slippery but not greasy, and have a special aroma. 2. Physical and chemical indicators: the contained protein is not less than 7%, the total sugar is not less than 22%, the crude fiber is not less than 3%, the ash is not less than 3%, and the fat is not less than 0.4%.

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Producers within the scope of protection of Wuying Black Fungus GI products may submit an application for the use of “Special Marks for Geographical Indication Products” to the Quality and Technical Supervision Bureau of Wuying District, Yichun City, Heilongjiang Province, which is approved by the General Administration of Quality Supervision, Inspection and Quarantine.