Winter vegetable cultivation must be cold insulation

1. Nitrogen control method: Appropriately reduce the amount of nitrogen fertilizer at the seedling stage, must not be partial nitrogen fertilizer, so as to avoid cold resistance of plants. Top dressing is early, in order to promote vegetable seedlings. Before the low temperature, you can't apply the available nitrogen fertilizer, and you should top-up a phosphorus and potassium fertilizer to enhance the cold resistance.

2. Application of organic fertilizer method: the use of pig manure or soil fertilizer and other warm farm fertilizer, circle cultivation in the root of the root of the vegetable tree, can increase the root temperature of 2-3 °C. Fertilization should be carried out on sunny days, 1,000-1500 kilograms per mu.

3. Pouring method: 400-500 kg of thin manure poured per acre before frost, so that the soil is not easy to freeze.

4. Earthing method: In combination with cultivator before chilling, smashing the roots with soil in smashed soil can loosen the soil, increase the soil temperature, and protect the root directly. However, the cultivating soil must be carried out before the soil is frozen. The depth should be 7-10 cm.

5. Coverage method: In the afternoon before the onset of frost, straw, straw, etc. are used to cover vegetables and vegetables, which can reduce wind and cold mechanical damage. Use 100 kg of straw per acre. Disperse it sparsely and cover all vegetables to prevent affecting photosynthesis.

6. Sprinkling method: First, a thin layer of husk ash or ash is sprinkled on the vegetables before the cold freezing damage occurs; the second is to spray the wood ash between the rows.

7. Smoke method: stacking piles with weeds, straws, litter, etc., or using asphalt, ammonium nitrate, coal powder, sawdust, etc. to make frost-proof bullets. Before the frost comes, the smoke is ignited at the corners of the top wind. Can disperse cold currents.

8. Wind barrier method: In the north side of the vegetable culm, it is used as a 1-1.5-meter-high wind barrier for straw, etc., and a wind barrier is installed every 3-4 ft.

9. Winter irrigation method: Irrigation time before freezing should be reduced to 2-5°C by the average daily temperature; after freezing, the maximum temperature rises to 2-3°C after the cold water is poured, and the soil and vegetable trees have been thawed. The winter irrigation should be poured with enough water to make it full of water.

10. Drainage method: Open a good "three ditch" to ensure that the gutters open, so that the timely removal of frozen water.

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