Winter greenhouse flowers antifreeze points

Frost damage to different flowers should be managed separately according to their different cold resistance:

1. Add cover. In the evening, small sheds should be placed inside the greenhouse and covered with straw curtains. At night, grass or corn stover can be added around the greenhouse to increase the temperature by 1°C to 2°C. Adding a thin layer of earthworm to the original grasshopper can increase the shelf temperature by 2°C to 3°C. Covering the original grasshopper with a layer of film can not only block the wind, but also prevent the rain and snow from wetting the grasshopper, thereby reducing heat loss caused by evaporation of water. For the flowers that are planted in the ground, they can also be covered with plastic film. After covering, the soil temperature can be increased by more than 1°C.

2. Smoke around. Before the arrival of the cold spell, smoking smoke around the greenhouse can prevent the heat around the greenhouse from radiating to high altitude and reduce heat loss.

3. Sweep the film. The dust, dirt and snow on the shed film can be removed in time to increase the light and increase the temperature of the shed.

4. Cover the mulch or small shed. Greenhouses cultivated on high ridges can be covered with a layer of mulch on high ridges, which generally can increase the ground temperature by 2°C to 3°C; for flat hoe cultivation, small sheds can be erected to raise the ground temperature.

5. Dig the cold ditch. Ditch the trench on the outer side of the outside of the greenhouse and fill in heat preservation materials such as horse dung, weeds, and straw to prevent the ground temperature from being dissipated and increase the temperature of the ground in the southern part of the greenhouse.

6. Double membrane coverage. A further layer of film is placed underneath the drop-free film. Since there is air between the two films, the temperature inside the housing can be significantly increased.

7. Pool insulation. In the center of the greenhouse, a reservoir is dug every few meters. The bottom of the pool is covered with plastic film and then filled with fresh water. A transparent film is then placed on the upper part of the pool (to prevent evaporation of water in the pool and increase the humidity of the air in the greenhouse). Since the specific heat of water is large, it can absorb heat (at high temperatures) at noon and release heat at night.

8. Reveal timely. When temperature conditions permit, cover the late cover as soon as possible to promote the photosynthesis of flowers. In the winter season, when sunny days flood the entire shed in the morning, the weather is generally not lower than 18°C. In cloudy or cloudy conditions, the light is weak, and grasshoppers should be uncovered in time to allow scattered light to enter. On the one hand, the temperature can be increased. On the other hand, there are more blue-violet light in scattered light, which is beneficial to photosynthesis. Avoid exposing grasshoppers for a long time, resulting in a cold inside the shed and a significant drop in temperature.

9. Increase fertilizer application. In the shed, horse dung, smashing grass and other brewing materials are applied to raise the temperature of the ground. The decomposition of organic fertilizers can release heat. Appropriate application of organic fertilizers and phosphorus and potassium fertilizers can not only improve soil pellet structure, increase soil temperature, provide nutrients for flowers, but also enhance the antifreeze ability of flowers.

10. Hang the light curtain. Hanging polyester aluminum film on the north side of the greenhouse can increase lighting in the shed and increase the temperature of the shed by 2°C to 3°C.

11. Heating warming. In case of extremely cold weather, stoves or heating can be added in the shed. However, when using the fire heating, care should be taken to prevent flower gas poisoning. The chimney should be installed outside the shed to prevent the fire from heating. The fumes emitted when the firewood is burning have great harm to the flowers.

12. Sprinkle wood ash. The gray ash of the plant is gray and black, and it has strong heat absorption capacity. After spreading evenly on the ground of the greenhouse, it can generally increase the ground temperature by 1°C to 2°C.

13. Spray antifreeze. Before cooling, spray the stems and leaves of the plant with 400 to 700 times of antifreeze to protect against freezing and freezing.

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