In winter, vegetables grown in greenhouses often suffer from frost damage. The remedial measures after freezing damage to vegetables are:
Irrigation insulation: Irrigation can increase soil heat capacity and prevent the ground temperature from continuing to fall. At the same time, irrigation can also stabilize the temperature of the atmosphere near the ground, so that the temperature is stable, and it is conducive to the restoration of vitality and vitality of the frozen tissue, thereby reducing the freezing injury.
Exhaling cooling: After the vegetables are frozen, they cannot be heated immediately by closing the shed. They can only release air to cool down, so that the temperature inside the shed slowly rises, so that the frozen tissue gradually absorbs the moisture that has been removed due to freezing, thereby promoting cell viability and reducing tissue death.
Appropriate shading: Cover sparse curtains or shade nets in the shed to prevent direct exposure of the seedlings to sunlight to prevent water loss and shrinkage of the frozen tissue.
Artificial water spraying: spraying water with a sprayer in the shed can increase the air humidity in the shed and can inhibit the evaporation of moisture from the frozen tissue.
Supplementing chemical fertilizers: After the chilled vegetables are thawed, they must topically apply a small amount of fast-acting chemical fertilizers, cut dead tissue, spray medicine, prevent disease, and strengthen management.
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