Effective anti-freezing methods of pepper seedlings in winter

During the period of raising pepper seedlings in winter, it is often attacked by a sudden cold snap, the temperature drops suddenly, and the seedlings are vulnerable to freezing damage. If the temperature drops slowly, it is not easy to freeze. If the temperature is not too low, but the low temperature lasts for a long time, especially in the case of "wet cold" accompanied by low temperature and overcast and rain, the seedlings are also prone to freezing injury.

The degree of freezing injury to seedlings is also related to the speed of temperature recovery after low temperature. If the temperature rises slowly, the seedling thaws slowly, and it is easy to restore vitality. If the temperature is heated and thawed too quickly, the tissue of the seedling will be easily dehydrated and dried up, resulting in the death of the seedling. The effective anti-freezing methods are as follows:

1. Improving seedling raising methods: using artificial temperature control seedling raising methods, such as electric hotbed and factory seedling raising, is the fundamental measure to completely solve the problem of seedling freezing.

2. Enhance the cold resistance of seedlings: avoid excessive growth of seedlings and remove mulch as far as possible before the advent of low temperature and cold current, so that seedlings can shine more and receive exercise. During continuous rain, frost and low temperature, remove the grass curtain as much as possible and let the seedlings shine for at least 2 hours a day. When it suddenly clears up after the rain and frost stops, several grass curtains should be covered on the seedling bed around noon to prevent the seedlings from losing water and wilting. If the humidity in the bed is high, the seedlings are vulnerable to freezing damage. So it is necessary to control the watering of the seedbed before the cold wave. If the bed is too wet, you can sprinkle a layer of hay ash.

3. Rational fertilization: increase the application of phosphorus and potassium fertilizer, and use cold-resistant agents at seedling stage. Spraying 0.5% of brown sugar or 1% glucose water on seedlings can enhance cold resistance. Spray twice in 3Mel 4-leaf stage (7 days apart) 0.5%? Mulan weary soil moisture good Luan depends on the evaluation of the bath? / p >

4. Heat preservation and anti-freezing: the seedbed should be closely covered during the cold wave. When ventilating for a short time, it is necessary to prevent cold air from blowing directly into the bed to hurt seedlings. Grass curtains should be added at night. Some scatter the dead leaves of the outer layer of straw on the seedlings in the bed and remove them after the cold wave. The grass curtain on the seedbed should be dry. After the frost stops, remove the frost from the nursery ground in time.