What are the remedial measures after greenhouse vegetables are damaged by freezing?
Remedial measures for greenhouse vegetables damaged by freezing
(Agricultural Wealth Network) After freezing damage occurs, water promptly. Watering can increase the soil's heat capacity, stabilize the surface and greenhouse air temperature, inhibit the drop in ground temperature, and effectively reduce and control the development of freezing damage. The amount of water applied should be enough to reach the plow layer; avoid flood irrigation, so that low temperature and high humidity do not cause vegetable root rot.
After greenhouse vegetables suffer freezing damage, do not close the greenhouse to raise the temperature immediately. If the temperature rises too quickly, the frozen tissues will dehydrate and die. The correct method is to ventilate and lower the temperature, allowing the greenhouse temperature to rise slowly so that the frozen tissues can fully absorb water, promote cell revival, and reduce tissue death.
After greenhouse vegetables suffer freezing damage, promptly prune off the frozen stems and leaves to prevent the frozen tissues from becoming moldy and diseased and inducing disease.
Erecting shade inside the greenhouse can prevent frozen vegetables from losing water due to direct sunlight.
For frozen plants, apply an appropriate amount of quick-acting fertilizer together with watering. This can improve the crop's nutritional status, enhance the plant's cold and freezing resistance, and promote early recovery of plant growth.
Foliar spraying saves fertilizer and acts faster than soil application, so spray reasonably according to the nutrient requirements of different crops. When spraying foliar fertilizer, adding an appropriate amount of gibberellin gives better results.
After plants suffer freezing damage, pests and diseases are likely to take advantage of the weakness, so promptly apply some protectants and disease-and-pest control chemicals.
After greenhouse vegetables suffer freezing damage, do not close the greenhouse to raise the temperature immediately. If the temperature rises too quickly, the frozen tissues will dehydrate and die. The correct method is to ventilate and lower the temperature, allowing the greenhouse temperature to rise slowly so that the frozen tissues can fully absorb water, promote cell revival, and reduce tissue death.
After greenhouse vegetables suffer freezing damage, promptly prune off the frozen stems and leaves to prevent the frozen tissues from becoming moldy and diseased and inducing disease.
Erecting shade inside the greenhouse can prevent frozen vegetables from losing water due to direct sunlight.
For frozen plants, apply an appropriate amount of quick-acting fertilizer together with watering. This can improve the crop's nutritional status, enhance the plant's cold and freezing resistance, and promote early recovery of plant growth.
Foliar spraying saves fertilizer and acts faster than soil application, so spray reasonably according to the nutrient requirements of different crops. When spraying foliar fertilizer, adding an appropriate amount of gibberellin gives better results.
After plants suffer freezing damage, pests and diseases are likely to take advantage of the weakness, so promptly apply some protectants and disease-and-pest control chemicals.