Rain and snow weather greenhouse management

In recent days, continuous rainy and snowy weather in northern China has had a great impact on the growth of greenhouse vegetables. Therefore, local farmers must strengthen management according to specific conditions to ensure that greenhouse vegetables are not damaged.

Multi-layer coverage, pay attention to insulation, rain and snow, the temperature is relatively low, should be covered with plastic straw on the film to improve the insulation effect.

Rain and snow weather, snowfall during snowfall during snowfall protection, if the temperature is not very low, do not fall haystacks, cover the grasshopper with old plastic film to prevent wetting, and remove snow from the shed after stopping snow. If the snowfall temperature during the day is low or snow falls during the night, the grasshopper should be dropped and an old shed film with no holes should be covered on the grasshopper to prevent the snow from wetting the haystacks. After the snow stops, the snow will be cleared promptly. If the snowfall is large, snow should be removed from the sheds in several stages during the snowfall to prevent the snow from being overwhelmed by the thick snow.

Even if the weather is too dark, as long as the temperature is not very low, it should continue to open the door every day to see the light and conduct appropriate ventilation. The exposing time may be appropriate later, and the time for covering can be appropriately earlier. As long as the temperature of the shed does not drop or rises slightly, the time for light exposure should be appropriately extended. If the temperature drops slightly after the exposing, it must be revealed before or after noon for 1 to 2 hours. Conditional curtains can be placed on the back wall, also have a certain role in increasing the temperature.

When the winds cool down, when the wind blows during the day and when the wind is strong, every three to five ones put down one and a half rolls of grasshoppers and press them in the middle of the film. It should not be placed in the end to prevent the wind from squeezing. When the wind is strong during the night, all the grasshoppers must be tightly compacted. The foot of the shed must be firmly clamped with wooden poles or stones to prevent damage to the film and the shed body and to prevent freezing damage to the vegetables.

After a long period of haze, the management is slow to see light and avoid flashing seedlings. When the sun is shining and the snow is clear after the rain and snow, do not uncover all the rakes. You should expose the rakes in the first three days. The area to be uncovered will gradually increase. You can use 1 to 3 rakes to open one. The method will gradually see the vegetables and prevent the seedlings from hitting the seedlings. After observing them, they will observe and find that the vegetables will fight and immediately cover the grasshoppers again. In this way, the number of rehearsals will increase from few to many. Until the normal growth of vegetables, generally only three days after the full open. For sheds that use roller shutters, weeds can be rolled to the middle of the shed and rolled off according to the situation. Otherwise, the vegetables in the shed are not bright enough for a few days, and the leaves are thin and tender. After sunny days, the light is strong and the transpiration is large. It is easy for the leaves to lose water, wilt, and flashing.

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