When the vegetable seedlings are planted in the early spring, the cold weather is prone to freezing damage, and measures should be taken to prevent freezing.
Increasing the light so that the seedlings are more sunny, should cover the coverings such as grass cover as early as possible in the temperature range that can maintain normal growth. Even if it is cloudy, rain or snow, it is best to use the light transmittance. High drop-free or dust-proof membrane, often keeping the membrane surface clean.
Control the humidity inside the greenhouse is too large, the water content of the seedlings is too much, the concentration of the cell fluid is low, and it is easy to cause freezing damage. Due to the low temperature and weak light in early spring, the humidity in the greenhouse is too high and it is easy to induce disease. In this regard, the nursery shed should strictly control the number of watering and watering, and the ventilation should be strengthened when the humidity is too high. Ventilation should be carried out at a high temperature before and after noon to prevent cold wind from directly blowing onto the seedlings and causing freezing damage.
Scientific fertilization does not apply nitrogen fertilizer, so as not to reduce the cold resistance of seedlings. Adding potassium fertilizer can improve the cold resistance of seedlings. Spraying sweet and sour liquid on the seedlings can increase the sugar content and hardness of the leaf meat, and also improve the cold resistance.
The outdoor part of the shed at night should be covered with insulation materials such as quilts and grass mites, and the coverings should be kept in a dry state. The interior of the shed should be insulated by a multi-layer covering method such as hanging two-layer film and buckle small arch shed. The north side of the greenhouse can be piled into a wind barrier to block the wind and prevent cold.
Increasing the light so that the seedlings are more sunny, should cover the coverings such as grass cover as early as possible in the temperature range that can maintain normal growth. Even if it is cloudy, rain or snow, it is best to use the light transmittance. High drop-free or dust-proof membrane, often keeping the membrane surface clean.
Control the humidity inside the greenhouse is too large, the water content of the seedlings is too much, the concentration of the cell fluid is low, and it is easy to cause freezing damage. Due to the low temperature and weak light in early spring, the humidity in the greenhouse is too high and it is easy to induce disease. In this regard, the nursery shed should strictly control the number of watering and watering, and the ventilation should be strengthened when the humidity is too high. Ventilation should be carried out at a high temperature before and after noon to prevent cold wind from directly blowing onto the seedlings and causing freezing damage.
Scientific fertilization does not apply nitrogen fertilizer, so as not to reduce the cold resistance of seedlings. Adding potassium fertilizer can improve the cold resistance of seedlings. Spraying sweet and sour liquid on the seedlings can increase the sugar content and hardness of the leaf meat, and also improve the cold resistance.
The outdoor part of the shed at night should be covered with insulation materials such as quilts and grass mites, and the coverings should be kept in a dry state. The interior of the shed should be insulated by a multi-layer covering method such as hanging two-layer film and buckle small arch shed. The north side of the greenhouse can be piled into a wind barrier to block the wind and prevent cold.
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Welded Wire Mesh
It is widely used as machine protecting mesh, garden or residential fence and livestock cage in industrial or agricultural area. In addition, according to different flexibility, welded wire mesh can be divided into 2 types: welded mesh roll and welded Mesh Panel. The former has better flexibility.
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