The production of Pleurotus ostreatus in winter and spring greenhouse should pay attention to the bad weather

In winter and spring, snow, cold current, strong wind, long-term overcast fog, continuous low temperature and other bad weather often come unexpectedly, light will cause yield reduction and quality reduction of Pleurotus ostreatus, serious will cause no harvest of Pleurotus ostreatus. Therefore, prevention and response to severe weather should be strengthened.

The main preventive measures are to wipe the shed film and improve the transmittance; check the greenhouse facilities to ensure the thermal insulation performance of the greenhouse; prepare the straw cover, the old shed film and other thermal insulation and warming articles.

Response management measures

Cold current and strong wind cooling weather: cold current and strong wind before the arrival, should block the vent, cover the tent film, and cover a layer of good old film on the straw mat. When the wind is strong, 2~3 thick ropes or No.8 iron wires are set on the straw mat along the east-west direction, and both sides are fixed with wooden piles, which can resist 6~7 strong winds. After the temperature drops, the straw cover should be uncovered late and early, and ventilation should be used at noon to facilitate heat preservation and moisture retention. When the wind is strong, roll the straw mat to 1/3 to 1/2 of the greenhouse depending on the wind force. In addition, the strong wind is easy to take away the moisture on the mushroom body in the shed, resulting in dry edge of mushroom cover, so the space in the shed should be sprayed continuously to maintain relative humidity.

Snowfall weather: should listen to the weather forecast in time, before the arrival of heavy snow, for some large span, column less greenhouse, must add temporary columns, support arch, prevent problems before they occur. At the same time, cover a layer of intact old film on the greenhouse straw mat, cover the whole greenhouse tightly, and press it firmly with bricks around. After the snow stops, the snow should be cleaned immediately. If it snows continuously, it should be cleaned as it falls, so as to prevent the greenhouse from collapsing due to too thick snow. After the weather turns clear, the straw mat should be uncovered immediately. If the light is too strong, the straw mat should be covered around noon to ensure that the mushroom will not be "shined mushroom" due to strong light. 2~3 days after snow, ice and snow begin to melt. At this time, the temperature is low, so the straw mat should be removed late and covered early, that is, after 10 a.m., the straw mat should be removed and covered at 3~4 p.m. Ventilation should be carried out at noon when the temperature is higher.

Long-term cloudy fog weather: winter and spring season for a long time cloudy fog weather is often accompanied by low temperature, in this period of time, as long as the temperature conditions allow, should open the grass cover to use scattered light to increase the temperature in the shed. If there are many mushrooms in the shed, ventilation can be carried out for 1~2 hours at noon, and if there are few mushrooms, ventilation can be carried out once every 3~5 days. And pay attention to artificial humidification.

Continuous low temperature weather: If the temperature is below-7℃ for more than 3 consecutive days, warming measures should be taken to ensure that no freezing damage occurs. One is to build a small arch shed in the shed. The second is to take artificial heating measures, but must pay attention not to use open fire, otherwise the carbon monoxide produced will not be emitted, affecting the growth of Pleurotus ostreatus, and it is easy to cause fire.