Sunny weather regulation
Keep a proper temperature. Ensure that the temperature in the upper part of the shed is 20°C to 16°C, the temperature in the second half of the night is 16°C to 12°C, the lowest temperature in the shed is not lower than 10°C, and the temperature in the second half of the night is usually 3°C-4°C higher than the temperature in the shed. The ground temperature is 5°C higher than the temperature in the shed to ensure the normal growth of the crop. Only by maintaining a suitable greenhouse temperature can the thermophilic crops absorb water from the soil when the ground temperature exceeds 14°C, and do not absorb water below 14°C.
Reasonable increase in lighting. Always wipe the shed film to maintain good light transmission conditions. In order to save the time for wiping the film, vegetable growers can attach cloth on the top of the film. The width is usually 5 to 7 centimeters, and the length is preferably 0.8 to 1.5 meters. The cloth will swing back and forth to reach the wiping booth. The purpose of the film. Exhaust air in time. If the water is wet on the previous day, the humidity in the greenhouse is heavy. After the grass is opened the next day, it must be released. The specific method can be determined according to the weather conditions on the day. The air release time is generally 30 to 45 minutes after the air outlet is closed.
Rainy and cloudy snow weather
In the rainy, cloudy snow weather the evening before the arrival of grasshoppers, it is necessary to cover the film in time to prevent rain and snow from weeding the grass. After the film is covered, it can also play a role in windbreaks. In addition, in order to increase the temperature in the shed, grasshoppers should be dragged to about half a meter from the ground. If grasshoppers are not long enough, it is better to put a layer of grasshoppers on the aisles in front of the shed to prevent the soil on the walkways. After freezing, it caused freezing damage to vegetables on the front face of the shed.
After rain and snow stop, it is necessary to timely clean the roof of the shed, then uncover the film and give light to the vegetables. It should be noted that after uncovering haystacks on cloudy days, the temperature in the greenhouse will not only decrease, but will rise by about 2°C, which will meet the needs of the crops. Therefore, on cloudy days, we must unravel the grass and increase the amount of light. With the sudden release of moisture at noon, it is a very important measure for cloudy management.
After the weather suddenly turned fine
After a sudden cloudy day in a cloudy sky, do not lift the grasshoppers at one time. This can cause crops to wilt or even die. Then, after the sudden turn of sunshine, how should greenhouse vegetables be managed? To sum up, it is to expel the grasshopper and spray the warm water to prevent “flashingâ€. After exposing the grasshoppers, the light in the shed shines on a bed, and the vegetables corresponding to the grasshoppers are exposed to strong direct sunlight. The vegetables that have not exposed the drafting curtain will receive the astigmatic light and the vegetables that are exposed to strong light. In general, wilting will occur after 15 minutes of unraveling the haystack. At this time, the plants should be sprayed with warm water at a temperature of 20°C in a timely manner to promote normal growth. This is repeated several times, and the normal management after sunny days after the second day is resumed. .
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