Applying quick-impact fertilizer. After the frozen vegetables are recovered from the slow-onset seedlings, the available nitrogen fertilizer and phosphorus and potassium fertilizers can be timely applied to promote the recovery of the vegetable plants. Before low temperature, 0.2% to 0.3% of potassium dihydrogen phosphate solution can be sprayed 1 to 2 times to increase the cold resistance; or 400 to 500 kg of thin human and animal manure and water can be applied per acre to reduce the degree of ice formation in the soil and reduce the damage to freezing. . Spreading 50 to 100 tons of fire-soil ash or plant-soil ash between the compartments of the vegetable can not only prevent cold and prevent freezing, but also play a role in increasing potash fertilizer, and has a good effect on the control of root rot of cruciferous vegetables.
Spray water or steam inhibitor. Shed vegetables and seedlings were light frostbite two to three days after the injury, short-term shade before and after noon to avoid sudden loss of water due to strong light and death. According to the humidity condition, a small amount of fresh water is sprayed at noon to increase the surface temperature and humidity, inhibit the dehydration and drying of the frozen tissue, and promote the absorption of frozen tissue. In the 3 to 4 days before the onset of the cold wave, sunny day sprayed 30 to 40 times petroleum inhibitors on vegetable plants to form a layer of invisible cold film on the leaves, which helps to reduce the transpiration of the leaves and protect the body temperature of the vegetables. To achieve the purpose of cold.
Irrigation insulation. The irrigation of horse water or watering of the frozen vegetables can increase the heat capacity of the soil and prevent the ground temperature from continuing to fall and reduce the freezing damage. After watering, pouring enough water, watering or watering, grasp the favorable period when temperature rises, and loosen soil to keep warm.
Trimming. After being frozen, timely cut off the young shoots that have been frozen to death. Even if the seedlings of the pepper seedlings are frozen, they can germinate side branches, take one of the strong branches instead of the main stem, and cut off the remaining side branches. Fresh pruned celery after pruning in the open field can also germinate new leaves.
Grab the rush. In order to reduce economic losses, cold-resistant spinach, Chinese cabbage, radish vegetables, and lettuce can be planted after the weather warms up. It is best to rush in the middle and small sheds, early emergence, early growth.
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