Clearing the ditch to prevent flooding and snowing can easily cause the ditch and mud to collapse. After the snow has to be cleared of the ditch immediately to remove the accumulated water, improve the vitality of the roots, and prevent the occurrence of waterlogging. Therefore, the snow on the canopy should be promptly removed, and the snow on both sides of the canopy should be timely. Clearance, to prevent absorption of large amounts of heat when melting to reduce the temperature within the shed, and drainage in time to prevent waterlogging.
Timely insulation treatment Winter greenhouse insulation is the key, the appropriate temperature is essential for the growth of vegetables, greenhouse insulation should be covered with straw curtains, non-woven fabrics, shade nets or multi-layer coverings and other insulation measures, if necessary, take smoke or Temporary replenishment and other measures to meet the continuous low temperature weather, the use of high temperatures at noon during the day, the need to timely remove the shed straw, non-woven fabrics, shade nets and other coverings, so that crops see the light for a short time, and timely ventilation Reduce air humidity in greenhouses and increase crop resistance.
After the fertilizing material is used to promote the development of heavy snowfall, appropriate amount of available nitrogen fertilizer and phosphorus and potassium fertilizers should be applied to the heavily frozen fields to promote plant growth and recovery. After a sudden snowstorm in the snow, the temperature in the greenhouse is very low. Once it is sunny, the temperature in the greenhouse will increase rapidly, and the transpiration of the leaf water will also accelerate. The soil temperature is low, and the water absorption capacity of the root is weak. It is prone to wilting, and it is serious enough to die.
Timely prevention and control of diseases The occurrence of diseases in greenhouse crops should focus on the management of temperature and humidity and the proportion of nitrogen, phosphorus and potassium fertilizers. In particular, nitrogen fertilizers must not be biased and attention should be paid to the application of organic fertilizers. Continuous rain, snow and cold weather, the humidity in the greenhouse is high, and attention should be paid to preventing the occurrence and spread of vegetable diseases and gray mold.