1. Cold prevention: Before winter arrives, mushroom growers should do the cold-proof work of mushroom greenhouse, check heat-preservation quilt, change films and implement the preparation work of greenhouse heating so that it could be done at any time once weather gets cold.
2. Snow prevention: In snowy weather, growers have to pay close attention to the situation of snow covered on the roof and be prepared to remove them. In Northern China, apart from steel-frame factory, all the greenhouses should be put emphasis on snow prevention for fear that accumulated snow makes troubles and causes economic losses.
3. Fire prevention: Dry air is common in severe winter, which results in destructive fire risk caused by heating equipment and wire aging. Therefore, fire prevention works should never be overlooked by mushroom growers.
4. Dry prevention: In winter, relative air humidity is in a low level, especially in case of ventilation, humidity of greenhouse dramatically gets declined, and hence humidity management of mushroom greenhouse directly affects the growth of mushroom.