Agaricus bisporus and oyster mushroom storage and preservation technology

I. The best time for harvesting Agaricus bisporus timely harvesting is when the mushroom umbrella will be opened but the pellicle membrane is not broken; Pleurotus ostreatus is best harvested when the color of the mushroom body is darker, the edge of the cap has not been fully expanded, and the spores have not been bombed. . After harvesting, the mushrooms were divided into grades, and unescorted mushrooms, mushrooms, and mushrooms were selected for storage. Second, the storage method 1. Low-temperature storage Agaricus bisporus after selection by grading, rinse with water, in order to prevent the mushroom yellow or brown, can be placed in 0.01% sodium metabisulfite aqueous solution rinse 3 to 5 minutes. Quickly cool the mushroom body with cold water, as soon as possible to 0 ~ 3 °C. Drain the water and put it in a ventilated plastic box. Store it in a cold room with a temperature of 0 to 3°C and a relative humidity of 90% to 95%. Pay attention to ventilation. This method can keep fresh for 8 to 10 days. Pleurotus ostreatus after removal of impurities, placed in 0.03 ~ 0.04 mm thick polyethylene plastic bag (preferably hit a few holes) and Zhakou, or placed in a plastic frame and covered with a layer of wet cloth, placed in a 3 ~ 4 °C cold storage During storage, it can be stored for 7 to 10 days. 2. The film bags are stored in air-conditioned storage and then drained after rinsing and grading. After cooling, each kilogram is packaged in a 0.025 mm plastic bag. The gas composition in the bag can be automatically adjusted so that the oxygen content is about 1%. The content is 2% to 5%. At this time, the growth of the mushroom body is inhibited, the number of open umbrellas is small, and the mushroom color is white. Pleurotus ostreatus is not sensitive to carbon dioxide. The use of ordinary polyethylene plastic bags can achieve the purpose of controlled atmosphere storage. The bag is best placed on absorbent materials to absorb condensate, which can be stored at room temperature for 7 days. If the time is too long, the carbon dioxide content in the bag is too high, which will affect the flavor of the mushroom. 6-8 holes with large holes can be pierced on the plastic bag to promote gas exchange. 3. Radiative storage Agaricus bisporus was packed in a porous polyethylene plastic bag and irradiated with γ-rays at a dose of 2000 to 3000 g. The irradiated mushrooms had less water evaporation and a low rate of weight loss, which significantly inhibited browning, breaking of the membrane and opening of the umbrella. The irradiated mushrooms can be stored for 4 to 5 days under the conditions of 16 to 18°C ​​and 85% relative humidity, and the storage time is longer under low temperature conditions. Pleurotus ostreatus is bagged and irradiated with gamma-rays at a dose of 1000 g. After being stored in a cold storage at 0 to 3°C, it can be stored for 1 month. 4. Storage of solid preservatives Fresh mushrooms should be immersed in a coating agent (such as glycerin or gelatin) for 3 to 5 minutes, picked up and drained, and then put into a polyethylene plastic bag. Each bag contains 0.5 kg of mushrooms; Sodium dithionite (deoxidizer) is mixed with a small amount of activated charcoal, wrapped in a paper bag and put into a plastic bag. The bag is tightly packed and stored at 16 to 18°C ​​for 6 to 7 days.

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