Anti-freezing Technology of Edible Fungi

The main varieties of edible mushrooms cultivated in winter are low-temperature varieties such as Agaricus bisporus, Flammulina velutipes and Lentinus edodes, which have strong tolerance to low temperature. the mycelium itself will stop growing at low temperature and enter a dormant state, and some mushroom beds are covered with soil. it also has a certain ability of heat preservation, so low temperature will not do much harm to edible mushrooms, even if a small part of the hyphae on the surface are frozen, the hyphae inside can still maintain vitality.

The lowest temperature of mycelium growth is between 3-6 ℃. If the temperature is below 0 ℃, the temperature of mushroom shed can be increased by 2-3 ℃ to reduce the frostbite of mycelium. However, as most mushrooms are mainly cultivated in the field, it is a top priority to keep the mushroom shed warm, prevent mycelium cells from freezing and avoid mechanical damage.

Main technical measures to prevent frost damage:

1. Stop spraying water immediately and try to keep the material surface dry.

2. Strengthen the management of heat preservation in mushroom shed. The small arch shed can be buckled in the greenhouse and covered with film, straw curtain and other covering materials for thermal insulation and dehumidification. Plastic film is used as an apron at the bottom of the shed to reduce the invasion of cold air at the bottom; plug the gap and minimize the gap heat dissipation; in the north of the greenhouse, crop straw is piled to form a wind barrier to protect against wind and cold; reduce the number of times in and out of the mushroom room, so that the temperature inside the mushroom shed is 3-5 ℃ higher than that of the outside, which can basically ensure the activity of the mycelium.

3. Seize the opportunity to pick up the temperature at noon and ventilate in time to prevent the cultivation materials from deteriorating and becoming sour.

4. remove the ice and snow accumulated at the top and around the mushroom shed in time to prevent the mushroom shed from collapsing.

5. Dig the drainage ditch around the mushroom shed to keep the drainage smooth and avoid the attack of Rain Water and snow water on the mushroom material.

6. Where there are conditions, you can refer to the method of secondary fermentation of mushrooms and pour steam into the mushroom shed to raise the temperature in the greenhouse. But the temperature is not easy to master, difficult, and such as multi-day heating, the cost is high.

7. After the temperature rises steadily, spray water to the material surface in time to resume daily management.