Irrigation insulation
Irrigation can increase soil heat capacity, prevent ground temperature from declining, stabilize near-surface atmospheric temperature, and contribute to a steady increase in temperature, so that frozen tissue can recover its function.
Cooling
After the shed vegetables are frozen, they cannot be warmed up immediately by closing the shed. They can only let the wind cool down, so that the temperature in the shed can rise slowly, and the sudden increase in temperature can prevent the frozen tissue from necrosis.
Artificial water spray
The water spray can increase the temperature of the air in the shed, stabilize the temperature of the shed, and inhibit the evaporation of water from the frozen tissue to promote water absorption.
Speeding up fertilizer
After the greenhouse vegetable is frozen, appropriate amount of quick-effect fertilizer can be chased to increase the concentration of the tissue fluid in the plant and enhance the heat resistance and ability to restore growth. After the thawing of the frozen plants, the quick-acting fertilizer should be chased and sprayed with 2% urea solution or 0.2% potassium dihydrogen phosphate solution.
Cut off dead branches
The frozen stems and leaves are cut off in time to prevent tissue damage and induce disease.
Shed shade
Covering the shade in the shed can prevent the frozen vegetables from being exposed to direct sunlight and dehydration of the frozen tissue.
Use hormones
After the vegetables are frozen, the plants grow slowly and exogenous plant hormones can be sprayed to promote growth.
Disease prevention and pest control
After freezing damage occurs to the shed vegetables, the frozen leaves and branches must be cut off in time to prevent mild tissue damage caused by frozen tissue. After the plants are frozen, the pests and insects can easily take advantage of them. Sprinkle some protective agents and prevent insecticides in time.
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