Edible bacteria cold and frost protection measures

I. Effect of cryogenic freezing on the production of edible fungi

The main varieties cultivated in winter are low-temperature varieties such as Agaricus bisporus, Flammulina velutipes, and shiitake mushrooms. Their ability to withstand low temperatures is strong. Most of the mycelium will stop growing at a low temperature and enter a dormant state, and some of the mushroom species also cover the soil. A certain insulation capacity, so the low temperature will not have much harm to edible fungi, even if there are a small part of the surface layer of mycelium frost damage, the mycelium inside can still maintain vitality.

The minimum temperature for the growth of mycelium is between 3-6°C. If the temperature is below 0°C, the temperature of 2-3°C can be increased by the shed (house) to reduce the frostbite. However, because most of Guangxi's mushrooms are cultivated mainly in the field, it is the most important task for the current cold-keeping and anti-freezing work for mushrooms to keep the mushroom sheds (houses) warm, prevent the freezing of mycelium cells, and avoid mechanical damage.

Second, the main technical measures to prevent freezing injury

1, immediately stop the water spray, try to keep the material surface dry (because the temperature of the edible fungus mycelium into hibernation, such as water spray easily die).

2, to strengthen the mushroom shed (house) insulation management. A small shed can be buckled in the greenhouse; the shed can be covered with a cover, such as a film, a straw curtain, etc., for heat preservation and dehumidification. The plastic film is used as apron at the bottom of the shed to reduce the cold air intrusion at the bottom; to close the gap and minimize heat dissipation in the gap; to be used as a straw wind barrier in the north of the greenhouse to prevent wind and cold; to reduce the number of access to the mushroom house, so that Mushroom (house) is 3 to 5 degrees higher than the outside temperature, which basically guarantees the maintenance of mycelial activity.

3, pay close attention to the timing of the rise of noon temperature, timely ventilation, prevent the deterioration of cultivated material acid.

4. Remove snow and ice accumulating on the top of the mushroom shed (room) and around it in time to prevent the mushroom shed (house) from collapsing.

5. Drain ditches around the mushroom shed (house) to keep the drainage smooth and avoid rain and snow from attacking the mushroom material.

6. Where conditions permit, referring to the method of secondary fermentation of mushrooms, introduce steam into the mushroom shed (room) to raise the temperature inside the shed. However, it is difficult to grasp the temperature, and it is more difficult, and if it is heated for several days, the cost is higher.

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

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