12 degrees. Do you want to cover the weather disc?

/kloc-Don't cover vegetables in 0/2 degree weather.

From the beginning of1February, all localities have entered the first frost period, which farmers and friends generally call "first frost Day". During this period, if the seedlings are not prepared for freezing, they will be easily damaged by frost, which is generally manifested as the invasion of leaf water. In a few days, if the air is dry, it will dry up, and if the air humidity is high, there will be a lot of mildew or diseases. Therefore, everyone should practice seedlings well during this period.

When practicing seedlings, we should follow the principle of "less ventilation on cloudy days, more ventilation on sunny days, and no ventilation on rainy days" to ensure that seedlings are strong, tidy and not wasted. Generally, the temperature in the chip should be controlled at about 20℃ on sunny days. When it exceeds 25°C, the film should be uncovered for cooling and ventilation until there is no water drop on the inner surface of the film. Before 4 pm, you can completely open the cover films at both ends or sides of the shed.

On cloudy days 12, small-scale ventilation can be carried out from the early morning to around 2 noon; In rainy days, there is generally no need to open a greenhouse. If it rains continuously for more than three days, you can open the two ends of the film to breathe for 2-4 hours at noon, but don't let the rain wet the seedbed. Even if the daily average temperature is lower than 12℃, the film should be removed for 2-3 hours at noon for three consecutive days without ventilation, but the time should not be too long.

Seedling raising function

Hardening seedlings refers to a measure to artificially "create" a harsh environment for seedlings in the seedling stage, so that seedlings can better adapt to their growth environment. In the case of seedling raising in protected areas, measures such as outdoor exercise, cooling and proper water control are usually taken to force seedlings to exercise, so that they can quickly adapt to the adverse environmental conditions in the open field after planting, shorten the delay time of seedlings and enhance their resistance to low temperature and strong wind.

The specific method of seedling raising is to strictly control the water content after the temperature gradually decreases-generally, watering is no longer needed, and when it is too dry and wilting, it should be sunny and watered a little in the morning; Control the growth of seedlings-in sunny weather, increase ventilation and reduce temperature to avoid overgrowth or tender stems and leaves.

Enhance lighting-under the condition of maintaining the normal life of plants, reduce the coverage as much as possible during the day, or use artificial lighting. At the same time, we should always listen to the local weather forecast. In case of cold current, we should always do a good job of cold protection and warmth.