How to manage greenhouse vegetables in special weather

Winter and Spring Festival: Vegetables grown in plastic greenhouses often encounter bad weather such as yin, cold, wind, snow, rain, etc. Poor management often results in huge economic losses. The response is:

 

Cold weather: In winter or early spring, in the case of continuous low temperature, cold weather, coverings such as mane and grasshoppers should be properly exposed. After the exposure, you should pay attention to observe the temperature change. If the temperature drops slightly, you should follow the cover and the temperature will rise slightly. You can re-cover the cover before 2 pm. In order to strengthen the night heat preservation, the number of bristles can be appropriately increased to make the cover thicker, and when the bristles are insufficient, the grass scorpion is covered. In production, there are many vegetable farmers who do not uncover the cover in the cold weather for a few days or even for several days. This will make the seedlings grow weaker. When the weather is warmed up, it will easily cause wilting death ( commonly known as "flash seedling"). ) .

 

Cooling weather at night: In the early spring, there is often a cold current in a few days of warm and sunny weather; when the cold current arrives, there is often a sudden cooling at night, and a slight negligence in management will cause great losses. To this end, we must pay attention to listening to and watching the weather forecast of local meteorological stations. In case of nighttime cooling weather, cover and compress the coverings such as mantis and grasshoppers. If the temperature is too large, increase the covering appropriately. .

 

Gale weather: Fix the transparent cover during the day, not to be blown away by the wind, cover it tightly at night, cover it well, if necessary, press the bristles and grass scorpions, otherwise, if it is blown off by the wind, the seedlings are very vulnerable. freeze. In the middle and late stages of the southerly winds, although the temperature is high, it is necessary to prevent the cold air from being blown directly into the raft from the vents to avoid damage to the seedlings; if necessary, it can be ventilated in the mouth of the scorpion.

 

There are cloud weather around noon: around noon, the sun is strong, and the temperature changes rapidly. If there are clouds in the air, you should always pay attention to observe the temperature change: the cloud covers the sun, the temperature is lowered, the vent is closed; the cloud passes the sunrise. The temperature will rise quickly, and the vents should be opened in time to prevent the roasting of the seedlings, especially when the top of the seedlings touches the plastic film.

 

Snowfall: During the daytime snowfall, cover the mane, cover the grass with scorpion, remove the snow immediately after the snow stops; snow at night, sweep the snow in time after the morning snow stops, keep the cover dry, and promptly expose Remove the cover to make the seedlings see light. After continuous snowy weather, it suddenly turned fine. After removing the cover, pay attention to observe the change of the seedlings, find the wilting, immediately cover it with the mane, and then uncover it after recovery, and then cover it again. After repeated, after 2 to 3 days. , can be transferred to normal management; if uncovering, it is easy to cause "pour seedlings."

Source: Inner Mongolia Agriculture and Animal Husbandry Information Network

 

 

 

 

 

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