With the onset of cold air activity, temperatures are set to decrease, leading to an overall gradual cooling. Faced with this temperature decline, it's crucial not only for people to focus on insulation but also for safeguarding vegetables against the cold.

Let's explore the technical guidance provided by agricultural experts.

Defense against Low-Temperature Damage:

Regularly check if the shed film is intact, promptly repairing any damage. For harvested vegetables in the field, swift harvesting helps prevent frost damage and minimize losses.

In greenhouses, especially for crops like eggplant and fruit vegetables, employing additional measures like small ring sheds, non-woven fabrics, grass curtains, and temporary heating can assist in maintaining warmth and reducing humidity.

Defense against Cloudy Days and Prolonged Overcast Conditions:

During sunny weather, organize the shed film to enhance light transmission. On cloudy and snowy days, adjust the field crop cover based on external temperature conditions to receive diffused light effectively.

Defense against Heavy Snowstorms:

Ensure timely maintenance of the greenhouse skeleton and consider increasing support columns if needed. Remove shade nets and insect nets promptly to prevent snow from causing damage to the greenhouse structure.

Strengthening Cold Resistance:

Besides genetic factors, the cold resistance of vegetables is closely linked to their growth conditions and strength. A practical measure is to reduce nitrogen use and increase phosphorus and potash fertilizers before winter.

Phosphorus regulates plant metabolism, enhances photosynthesis, and promotes root growth, improving resilience. Potassium acts as an active agent for various enzymes, promoting growth and resistance.

Scientific Management of Fertilizer and Water:

In winter, irrigate on sunny days, avoiding watering on cloudy days and in the afternoon. Adjust fertilization before cooling by reducing nitrogen and using rotting organic.

Watering should be done in advance of anticipated cold spells to avoid counterproductive stimulation of weakened roots.

Moderate Shed Ventilation:

Utilize sunny weather for timely ventilation and dehumidification to reduce shed humidity, lowering the risk of pests and diseases. Consider the use of fumigants for pest and disease control.

Supporting Technology Application:

Integrate water and fertilizer technology to reduce humidity and disease occurrence. Employ green ecological prevention and control technology to minimize chemical pesticide usage, ensuring product quality.

Safe Production Implementation:

Improve the management of greenhouse heating by regularly inspecting for safety hazards, including private wires and non-standard fuel heating, to prevent potential accidents.

Information Monitoring:

Stay vigilant on weather information and price fluctuations. Timely report of frost damage caused by cold waves, ensuring effective disaster relief efforts.