Shelter management for different weather in winter

In the winter and spring season, vegetables grown in plastic greenhouses often encounter bad weather such as overcast, cold, wind, snow, and rain. Poor management often results in huge economic losses. Its countermeasures are:

1. Cold and cold weather In winter or early spring, you will experience constant low temperature and cold weather. Covers such as mane grasshoppers and grasshoppers should be exposed properly. After the exposing ceremony, it is necessary to observe the changes in the temperature. If the temperature is slightly reduced, it should follow the cover. The temperature will rise slightly. The cover can be re-covered before 2 pm. In order to strengthen the heat preservation at night, the number of bristles can be appropriately increased to thicken the cover. When the bristles are insufficient, cover the grasshopper. There are many vegetable farmers who often do not open the cover on the day or even several consecutive days in cold and cold weather. As a result, the seedlings will grow weak. When the weather warms up, it will easily cause wilting death (commonly known as “flashing seedlings”). ).

2. Nighttime Cooling Weather In the early spring, a cold stream often occurs for several consecutive days. When the cold current arrives, it often occurs suddenly at night, and there is a slight oversight in management, which will cause great losses. To this end, we must pay attention to listening to and watching the weather forecast of local meteorological stations frequently. In the event of night-falling weather, we must cover and tighten the coverings of mane grasshoppers, grasshoppers, and so on. If the cooling rate is excessive, we must increase the coverage appropriately. .

3. In the windy weather, the transparent cover is fixed during the day so as not to be blown by the wind, the cover is tightly closed at night, and if necessary, the mane rake, grasshopper, etc. are pressed well. Otherwise, once the wind blows off, the seedling pole Easy to be frozen. In the mid- and late-stage encounters with southerly weather, although the temperature is relatively high, cold air should be prevented from blowing directly from the vents into the raft to avoid damaging the seedlings; if necessary, it can be ventilated in the mouth of the raft.

4. Before and after noon around noon, the sun shines around noon, and the sun shines brightly. The temperature changes rapidly. If clouds appear in the sky, observe the changes of the temperature at any time. Clouds cover the sun and the temperature of the earth will decrease. Ventilation should be closed. Out, the temperature will soon rise again, should promptly open the vents to prevent roast injury seedlings, especially when the top of the seedlings touch the plastic film, you should be more careful.

5. Snowfall During the daytime snowfall, it is necessary to cover the mane grasshoppers, cover the grasshoppers, and clear the snow immediately after the snow stops; night snowfall, snowfall after the morning snow stop, keep the cover dry and timely Remove the cover to see the seedlings. The continuous cloudy snow weather suddenly turns cloudy. After peeling off the cover, pay attention to observing the changes of the seedlings, find the wilt, immediately cover it with a bristle, recover and then uncover, and then wilt again, cover it again and again, after repeated 2 to 3 days. Can be transferred to normal management;

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