How to Prevent Frost Damage to Chili Pepper Seedlings? Latest Measures Explained
Chili pepper is a common seasoning vegetable, and we cannot do without it in our daily lives. With greenhouse technology, it can be grown all year round, but during the seedling-raising process, even a little cold wind can cause frost damage, seriously affecting planting returns. So how should frost damage to chili pepper seedlings be prevented? Follow the editor to learn about it.
1. Improve seedling-raising methods
Traditional seedling-raising methods are highly prone to frost damage during ventilation. Temperature-controlled seedling-raising methods can be used, such as electric heating seedbeds and factory-based seedling production. This is an effective measure to solve seedling freezing. During artificial seedling raising, chili pepper seeds can be soaked in cultured bacterial liquid before sowing, which can significantly increase the seed germination rate. Moreover, the cultured bacterial liquid can also produce biological enzymes and some nutrients that can effectively improve seedling quality and enhance the cold resistance of seedlings.
2. Enhance the cold resistance of seedlings
Before winter cold waves arrive, the covering materials can be removed as early as possible to let the seedlings receive more light for hardening. When watering, bacterial liquid can be sprayed to improve photosynthesis in seedling leaves, promote seedling roots to grow downward, and improve their cold and disease resistance. During rainy and snowy low-temperature weather, make use of breaks when the weather clears to remove the straw mats so that the chili pepper seedlings can receive sunlight. When it suddenly clears up after rain, several straw mats can be placed at intervals over the seedbed around noon to prevent the seedlings from losing water and wilting. When the seedbed humidity is relatively high, the seedlings are very prone to freezing, so watering should be controlled before a cold wave arrives. When the seedbed soil is too wet, plant ash can be scattered to absorb moisture.
3. Balanced fertilization
Fertilizing during the seedling stage can also improve cold resistance, but improper fertilization can cause excessive seedling growth, resulting in thin and weak stems and poor cold resistance, so fertilization must be balanced. During the seedling stage, more phosphorus and potassium fertilizer can be applied to improve cold resistance. This can significantly enhance the cold resistance of seedlings and improve photosynthesis in the leaves. At the 3-4 leaf stage, bacterial liquid can be sprayed once every week to enhance resistance; generally, spraying twice is enough.
4. Keep warm and prevent freezing
During cold wave periods, the seedbed must be tightly covered. During short periods of ventilation and air exchange, prevent cold wind from blowing directly into the seedbed to avoid damaging the seedlings. At night, straw curtains can be added, or rice straw can be scattered over the seedlings and then removed after the cold wave passes. The straw mats added over the seedbed should be dry. After snowfall stops, accumulated snow should be promptly cleared from the seedbed to prevent water accumulation in the seedbed after it melts.
The above is an introduction to preventive measures for frost damage to chili pepper seedlings. We hope it can help you. To learn more related knowledge, please stay tuned to us.