What are the effective methods for protecting pepper seedlings from freezing in winter?

During winter pepper seedling raising, sudden cold waves often strike, the temperature drops abruptly, and the seedlings are prone to freezing damage. If the temperature drops slowly, they are less likely to freeze. If the temperature is not very low but lasts for a long time, especially when low temperature is accompanied by rain, a condition known as "wet cold", the seedlings are also very prone to freezing damage.

The severity of freezing damage to the seedlings is also related to how quickly the temperature rises after the low temperature. If the temperature rises slowly, the seedlings thaw slowly and easily regain their vitality. If the warming and thawing are too fast, the tissues of the seedlings easily dehydrate and dry out, causing seedling death. The effective antifreeze methods are as follows:

1. Improve seedling raising methods: Using artificial temperature-controlled seedling raising methods, such as electric heating hotbeds and factory seedling production, is the fundamental measure to completely solve the problem of seedling freezing.

2. Enhance the cold resistance of seedlings: Avoid excessive seedling growth. Before low temperatures and cold waves arrive, remove the coverings as much as possible to let the seedlings receive more light and hardening. During continuous rain, frost, and low temperature, also remove the straw curtains as much as possible, and let the seedlings receive sunlight for at least 1-2 hours every day. When it suddenly clears up after rain and frost stop, cover the seedbed with a few straw curtains around noon to prevent the seedlings from losing water and wilting. If the humidity inside the bed is high, the seedlings are prone to freezing damage. Therefore, watering of the seedbed should be controlled before the cold wave arrives. If the bed is too wet, a layer of dry plant ash can be scattered.

3. Reasonable fertilization: Increase the application of phosphorus and potassium fertilizers, and use cold resistance agents during the seedling stage. Spraying seedlings with 0.5%-1% brown sugar or glucose water can enhance cold resistance. At the 3-4 leaf stage, spray twice (7 days apart) with 0.5%? Muran tired soil good enhance cold resistance? /p>

4. Heat preservation and antifreeze: During the cold wave, the seedbed must be tightly covered. When carrying out short-term ventilation, prevent cold wind from blowing directly into the bed and injuring the seedlings. At night, add straw curtains. Some spread the outer dead leaves of rice straw on the seedlings in the bed, and remove them after the cold wave passes. The straw curtains covering the seedbed should be dry. After frost stops on frosty days, promptly remove the frost from the seedling raising site.