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The Shelter Dishes Answer Five Measures of "Cooling the Cold"
Management should take effective measures to minimize the impact of cold spells on vegetable production. First, strengthen cold-time exercise at the seedling stage to improve the cold resistance of seedlings. After the seedlings are in full, the seedbeds are ventilated in time, and the amount of ventilation is gradually increased so that the young seedlings of the vegetables can pass the low-temperature exercise to improve the cold-resistance of the seedlings and adapt to the outdoor low-temperature environment. Second, increase protection facilities. 1, add wind barriers. The wind barrier can form a special microclimate condition within a certain range to prevent further cooling of the surface. 2. Ditch planting vegetables and cover the mulch. Third, timely irrigation or plant water spray. Before the advent of “cold springâ€, timely irrigation can reduce the degree of frost damage; or use a sprayer to spray water on the surface of plants to make the body temperature drop slowly and mitigate freezing injury. Fourth, temporarily warming and smoke. When the cold weather comes, a simple coal stove is set up in the nursery shed or production shed for temporary heating to prevent freezing damage. The cold smoke that occurs in the field during the night can effectively reduce or avoid freezing damage. However, there are two points that need attention: 1. The pyrotechnics should be dense enough to allow the smoke screen to cover the whole park. 2, the lighting time should be appropriate, should be in the wind direction, from midnight to 2-3 o'clock in the morning, until there is still smoke before the sunrise enveloped the ground. Fifth, cultivator. The cultivator will be cultivated several days before the onset of the cold current. After the rammed soil is loosened, the solar thermal energy can be better absorbed and stored, and the freezing damage can be effectively mitigated.