Antifreeze measures for winter pepper seedlings

During the winter pepper growing season, plants are frequently threatened by cold air masses. A sudden drop in temperature can cause seedlings to freeze, especially when they are still tender and not fully acclimated. If the temperature decreases gradually, seedlings are less likely to suffer from frost damage. However, even if the temperature isn't extremely low, a prolonged period of cold weather—especially when combined with rain—can still harm the young plants. The extent of the damage also depends on how quickly temperatures rise after a cold spell. If the thawing process is too rapid, the plant tissues may lose moisture and become dehydrated, leading to wilting or even death. To protect pepper seedlings from frost, several effective measures can be taken. One key approach is to improve seedling cultivation techniques. Using controlled temperature methods such as electric heating beds or industrialized seedling systems is essential for preventing frost damage. These methods provide a stable environment that helps seedlings withstand cold stress more effectively. Another important strategy is to strengthen the cold resistance of the seedlings. Avoid overwatering, and ensure the seedlings receive enough sunlight by removing covers before a cold front arrives. This allows them to harden off and adapt better to cooler conditions. During periods of snow or rain, take advantage of clear intervals to remove straw covers so the plants can get sunlight. After a sudden stop in snowfall, it's best to cover the seedbeds with a few layers of straw curtains during midday to prevent dehydration and wilting. Maintaining proper soil moisture is crucial. If the bed is too wet, seedlings are more vulnerable to frost. Before a cold wave, reduce watering and sprinkle a thin layer of ash or straw to help control humidity. Applying phosphorus and potassium fertilizers at the right time can also enhance cold resistance. Spraying a 0.5% to 1% solution of brown sugar or glucose can boost the plants' ability to withstand low temperatures. Additionally, applying a 0.5% calcium chloride solution during the 3-4 leaf stage, two times with a 7-day interval, can further improve their resilience. When a severe cold wave hits, it's important to cover the seedbeds tightly with insulating materials. When ventilating, make sure cold air doesn't directly enter the bed. At night, use straw to cover the plants. The straw should be placed directly on the seedlings and removed once the cold weather passes. Keep the straw curtain dry, and after snowfall, remove the snow from the nursery area promptly to avoid waterlogging and additional stress on the plants.

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