In winter, the weather is getting colder, allowing the plants to die naturally in the field, allowing nutrients to flow back to the roots. Remove the dry grass in the field. If the land has been frozen, it can be properly covered to thaw. Remove the soil between the rows, ditch and pull out the small bulbs for cold stimulation and sunlight to break the dormancy. After 3 ~ 5 days, the roots of the leek discolored, and the fine soil fertilizer was applied, flattened, and the "root application + pesticide" was applied once to control the insects. Water the water, set a wind barrier every 2 畦, insert a bow-shaped bamboo sheet, and cover it with a film. Cover grasshoppers are warmed and kept warm during the day and maintained at 20 ° C ~ 25 ° C during the day. After the plants have grown, ventilate, reduce humidity and prevent disease. On a cloudy day, as long as the temperature inside the salamander does not decrease, the grasshopper must be opened to allow the chives to receive scattered light. Appropriate spraying of vegetable strong spirits at the appropriate time promotes the plants to have thick stems, thick leaves, fresh leaf colors, lush plants, and strong natural taste. At the same time, it can improve the ability to resist disasters, reduce the amount of pesticides and fertilizers, and reduce residual poison. The first crop is harvested after 30 to 40 days of coverage. Spray fresh high-fat film of ecological agents in time after harvesting to prevent infection by germs. When the seedlings grow to 5-10 cm, apply urea once, water it once, and then cover it. The second crop can be harvested 25 days after the first crop, and the third crop can be harvested 30-35 days after the second crop. After the weather gets warm, remove the cover in time.
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