Cucumber freezes easily when the weather gets cold. What remedial measures are there after freezing?

Pour water to keep warm. Irrigation can increase the soil heat capacity, prevent the ground temperature from dropping, stabilize the atmospheric temperature near the surface, make the temperature rise steadily, and help to restore the function of frozen tissue. Blow to cool down. After the cucumber freezes, it can't be heated immediately by closing the film, but only by wind, and the temperature in the warehouse will rise slowly to avoid a sharp rise in temperature and prevent the frozen tissue from breaking. Spray a new high-fat film. Spraying a new high-fat film can increase the temperature of plants, stabilize the temperature of warehouses, inhibit the evaporation of water in frozen tissues and make tissues absorb water.

Cut off the frozen stems and leaves in time and spray protective water for sterilization, so that it will not organize fungal diseases and cause diseases. Shading in the shed can prevent frozen cucumber from being exposed to direct light and prevent frozen tissue from losing water. The quick-acting fertilizer should be recovered after delayed emergence of frozen plants, and 800 times of plastic film solution and 2% ether solution or 0.2% potassium dihydrogen sulfate solution should be sprayed on the leaves. After plants are frozen, pests and diseases are easy to enter, so new plastic film should be sprayed in time to avoid pests and diseases, isolate virus infection, restore plant physiological vitality and promote plant growth.

The overall cold air in China is frequent. Especially in the north, cold air often appears. In this weather, vegetable farmers all over the country are taking heat preservation measures for fear that their hard-earned vegetables will meet the East China Sea. Vegetables in winter are planted in greenhouses, but if they are neglected in management, they are vulnerable to cold damage, especially loose melons. Take cucumber as an example. If the plant is frozen by low temperature, photosynthesis will be weakened, and the whole plant will die because of insufficient nutrition, which is very harmful to vegetable farmers. The suitable temperature for cucumber growth and development is 15-30 degrees, and the growth rate is the fastest (25-30 degrees). When the temperature is lower than 5 degrees, plants will suffer from cold damage, and when it is lower than 0 degrees, plants may die. Therefore, the chilling injury of cucumber is caused by low temperature. The faster the cooling, the more serious the chilling injury of cucumber. When the temperature drops slowly, the symptoms of chilling injury will be alleviated, but in sunny days after low temperature, chilling injury may be aggravated.

The chilling injury of cucumber seedlings is mostly due to the high temperature in the greenhouse, so the chilling injury will occur when the seedlings are suddenly attacked by cold air. Even if the time is short, it will cause this loss, but it will only hurt the epidermis of cotyledons. The mole still exists after the nursery temperature is raised, but if the true leaves grow normally, the seedlings can continue to grow. As long as the temperature in the nursery is properly raised, it is enough not to be too violent when outdoors. If tiger spots are found on cucumber leaves, it is mainly caused by sudden cold air when the indoor temperature rises. This is a common chilling injury of cucumber, and vegetable farmers say it is flash. After frostbite, moles will not appear immediately, but will appear in a few days. This is not necessarily that the temperature is below zero. Mainly because of sudden changes in temperature or humidity. Especially when the weather gets warmer, you can't open the gap to adjust the temperature in time.