Greenhouse vegetables after snow management

Vegetables that are cultivated in plastic greenhouses should be promptly taken the following countermeasures in the event of snow weather.

Keeping the cover dry When the grass cover is wet with snow, its cold insulation performance will be greatly reduced. Therefore, the snow should be covered with a layer of plastic film on the grass, which can reduce the heat loss in the greenhouse and prevent the snow from soaking the grass.

Strictly prevent the snow pressure from causing the collapse of the shed and the snowfall. Due to the gravity of the snow, the thick snow can often compress the unstructured shed. For some sheds with large spans, few pillars, or no pillars, temporary pillars must be added to support the arches in the snow days to prevent any possible accidents. After the snow stopped, it was necessary to remove the snow in time, especially at night. For the snow around the shed body, it can not be removed, because the snow will not cause pressure on the shed body skeleton, thick snow layer can also play a role in insulation.

In the snowfall days, it is not possible to cover the grass. The snowfall is generally thicker, the ground cooling is slow, the wind is small, and the temperature is not too low. In order to reduce the troubles of removing snow, soaking the grass and soaking the grass and reducing the pressure on the roof of the grass, the grass can be rolled up during the snowfall, and the snowflakes accumulate on the awning. A thick layer of snow covers the snow on the surface of the film. With insulation, like a layer of grass cover. After the snow stopped, the snow on the surface of the membrane was quickly removed and the grass was covered at night.

Prevent “Sprouts” Some vegetable farmers are afraid of freezing their seedlings. They are not exposed in the snowfall days, and they are not even exposed for a few days. The plants do not see light for several days. This will make the seedlings grow weak, and will be exposed after the weather warms up. It is easy to cause wilting death (commonly known as "flashing seedlings"). In production, we must pay attention to the weather when we encounter a long and clear sunny weather. The first few to expose a few, make the indoor temperature rise slowly, and observe the performance of the blade. If the leaf is normal, then gradually increase the number of exposing until it is fully opened; if there is a phenomenon of wilting, it should be promptly covered with several grasshoppers, and exposing and reclamation sometimes need to be repeated for 2 to 3 days.

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