The high humidity in the shed in winter is particularly conducive to the occurrence of high-humidity diseases, such as bacterial diseases. Therefore, in addition to increasing the temperature and increasing light in winter, we must also control the humidity.
Increasing the amount of straw such as crushed wheat straw, corn leaves and other crop straws has a good moisture absorption effect, at the same time, it can reduce the amount of soil evaporation and prolong the water retention time of the soil. It is suggested that vegetable farmers can remove the mulch film covering the straw in the operation row to increase the straw usage. If the original use of one bag of straw per row, it can be increased to 3 to 4 bags, which has the same effect as the film. The thicker the straw is, the better the effect of preventing the operation from being trampled and compacted.
The front face is set with a moisture barrier film. The humidity of the front face has been reduced. Vegetable farmers have not had a good way to deal with it, so blocking the moisture in time can reduce the occurrence of diseases on the front face. Generally speaking, the mulch can be hung vertically at the front face to prevent moisture. The upper part of the mulch must be tightly connected with steel wire and the lower part must be compacted with soil to form a relatively closed environment. Dissipation of heat in the shed.
Reduce the obstruction of the greenhouse film. After the dew condensation of the greenhouse film, if an obstacle is encountered during the dripping process, water droplets will drip on the surface of the plant and the film, causing excessive local humidity in the greenhouse, which will cause diseases. The obstacle that causes the drops of water to drop is often the place where the film is stuck. Therefore, this film should be pressed below the front face corner. If it is set higher, the upper end of the moisture barrier film mentioned above can be pulled up to allow the dripping. Water droplets flow along the moisture barrier to the front face to avoid dripping.
Use of water-saving equipment under the film The use of water-saving irrigation in winter has a very good effect on reducing the humidity in the shed, especially the water-saving irrigation under the film formed after the film coating, which reduces the humidity more obviously. In areas with better groundwater conditions, the application of water-saving irrigation under the film should be vigorously promoted.
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