Overwintering planting technology for onion false planting

Before the planting, the seedlings are shoveled out of the field (as far as possible without damaging the root system), shake gently, shake off the floating soil, and remove the shootless seedlings, seedlings with no roots, no growth points, short, slender seedlings, and long leaves. Injury seedlings and pests, and onion sprouts (scallion seedlings part of the erect growth; leaf base cross section is round: the onion seedlings sheath part of the erect slightly curved, the base of the leaf blade is concave). In order to facilitate management, onion seedlings should be graded and planted. The grading standards are: first-class seedlings, small bulbs 0.6 to 0.7 cm, leaves 3 to 4; secondary seedlings, small bulbs 0.4 to 0.6 cm, and 3 leaves. Edges are tied into groups of 80 to 100 bundles of bales. The bales are graded and implanted.
A seedling was planted in Yangshuo. Yangshuo should choose to lay a layer of dry sand with a thickness of about 5 cm behind the wind barrier or other leeward shades, and then pile up small ridges 5 to 7 cm high on the dry sandy soil on one side of the ridge. Put a row of bales of seedlings one by one in a row, place them in a row, and pour 5 to 7 centimeters in the root of the seedlings, then place a straw with a diameter of 2 to 3 centimeters on the clay. Two rows of seedlings before and after the interval. After all the implants are planted, soil shall be used to block the area around the concrete, so as to prevent wind and water penetration.
Secondary seedlings are planted in cold ditch. To prevent flooding, the cold-proof ditch should be selected at a higher elevation. The specific method is: 5 to 10 cm intervals east-west ditching, ditch length 3 to 5 meters, width 25 to 30 centimeters, depth 15 to 20 centimeters, the bundle of seedlings to the south side tilted at 45 degrees placed In the trench, the top of the soil is covered with alum. After all the plants were erected, wind barriers were set around them to make the seedlings leeward and cloudy. The wind barriers were tightly sealed with soil and protected from wind and rain. The leaves of young seedlings planted in this way will grow slowly, and in the case of continuous decline in the outside temperature in Northeast China, they should be covered with batches of soil or covered with crop stalks against cold in accordance with the weather conditions.
Usually pay attention to the weather forecast. Cover the seedlings with plastic film before cloudy snow. Remove the thin film and clean the snow around the snow to prevent the snow from entering the bowl: it will cause rotting.
Using the above methods, onion seedlings can be safely overwintered until they are planted in the field in early March of the following year.

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