1, outdoor cooling: After the vegetables in the greenhouse are frozen, the greenhouse cannot be closed immediately to raise the temperature, but only outdoor cooling can be carried out, so that the temperature in the greenhouse can rise slowly and the frozen tissue can be prevented from dying due to sudden temperature rise.
2. Set up a shed for shade: set up a shed for shade in the shed to prevent frozen vegetables from being exposed to direct sunlight and make frozen tissues lose water.
3. Fertilization: After slow planting of frozen plants, quick-acting fertilizer should be applied and sprayed on the leaves with 2% urea solution or 0.2% potassium dihydrogen phosphate solution.
Qinghai vegetable greenhouse
4. Irrigation insulation: Irrigation can increase the soil heat capacity, prevent the ground temperature from dropping, stabilize the near-surface atmospheric temperature, help the temperature rise steadily, and restore the function of frozen tissue.
5, disease prevention and pest control: after plants are frozen, pests and diseases are easy to take advantage of it, and some protective agents and disease prevention and pest control drugs should be sprinkled in time.
6. Artificial water spraying: water spraying can increase the air temperature in the shed, stabilize the shed temperature, control the evaporation of frozen tissue water and promote tissue water absorption.
7. Cut off dead branches: cut off frozen stems and leaves in time to avoid moldy tissue lesions and induce diseases.
The above seven points are the anti-freezing measures for vegetables arranged by Bian Xiao, a greenhouse manufacturer in Qinghai. If you have any questions about the greenhouse, please call us directly for consultation.