Overwintering seedlings of autumn spinach
Autumn spinach is the overwintering vegetable harvested in autumn sowing, and it will return from winter from the end of November to the beginning of March in the second year. It will last for more than 100 days. Under the condition of long-term low temperature, how to ensure safe wintering is the key to winning the harvest. First, pour frozen water. Pouring frozen water must be "certain, two appropriate." "Determined" is based on the amount of soil moisture decided not to pouring frozen frozen water: Absolute moisture content of sandy loam in less than 15%, loam is less than 17%, clay is less than 20% should be poured frozen water. "Two suits" means timely and appropriate watering: The time suitable for pouring frozen water is when the soil in the soil can be defrosted during the day and there is freezing at night; the proper amount of water means that the amount of frozen water cannot be too large or too small, and generally it is connected to the bottom. It is appropriate. Second, catch up with winter fertilizer. The forced application of overwintering winter fertilizer can increase soil nutrient content, play a role in winter fertilizer, and promote weak and strong. In particular, it is more important for less-fertilized, poorly-fertilized, and weak-seated vegetable plots. In general mu application of urea 10 kilograms or ammonium sulfate 20 kilograms, in combination with pouring frozen water over the winter fertilizer effect is better. Third, cover cold-proof material. Absolute low temperature during the cold period in the northern region is very unfavorable for safe wintering of the seedlings. Therefore, the cold-proof materials should be covered to ensure safe wintering of the seedlings. Coverage can generally be carried out after all the soil in the plough layer is frozen. The effect of covering the manure rich in organic matter and breaking it down is good, with about 1,000 kilograms of mu.