The center of the autumnal field management of green onions is to promote roots, strong trees and soil softening, strengthen the management of fertilizers and waters, create suitable environmental conditions for the formation of light blue, and improve the yield and quality of green onions.

1. Watering: After the onion is planted, the management center is to promote rooting. Watering should be controlled, and the water should be drained and flooded after the rain to prevent rot, yellow leaves and dead seedlings. At the same time, the cultivator should be strengthened to promote root growth. Between the beginning of autumn and Bailu, the principle of light pouring, watering in the morning and evening should be mastered in irrigation. After the white dew, green onions have entered the period of growth. Watering should be based on the principles of pouring and re-watering, pouring water every 4 to 6 days. With the watering and spraying of new high-fat membrane 800 times heat preservation to prevent evaporation of water, isolation of gas-borne pathogen invasion; after the fall of the temperature, the green onion basically grows, the water requirement decreases, to keep the soil moist before harvest 5-7 days Stop watering, which is conducive to harvesting and transportation.

2, top dressing: Welsh onion basis in the application of base fertilizer but also phase fertilizer. After the beginning of autumn, when the growth of plants is accelerated, the topdressing “foliage fertilizer” is applied, and 1500-2000 kilograms of farmyard manure per acre is applied, and 20-25 kilograms of superphosphate are used to promote leaf growth. After the White Dew Festival, it enters the period of vigorous growth of scallions, and it is the key period for the formation of welsh onion production. It should be combined with watering to top up 2 times of “attacking tree-fertilizers”, each applying 15-20 kg of urea and 10-15 kg of potassium sulphate. Sprinkle between rows, watering after shallow cultivating, spraying new high-fat membranes to increase the utilization of effective ingredients of fertilizers.

3. Earthing: Earthing is an important measure to soften leaf sheaths, prevent lodging, and increase light blue yield and quality. From the autumn festival to the harvest, generally three times of soil cultivation, the former two combined with cultivator, the ridge into the onion ditch, filling the ditch at the end of summer; the height of each cultivating scallion, should be based on the height of pseudostem growth, each time 3-4 cm, the soil is cultured to the leaf outlet of the uppermost leaf blade, and the heart leaf must not be buried to prevent the leaves from rot. Combining the soil in time to spray the stem stalks makes the stem of the garlic plant thick, the leaves are thick, and the leaf color is fresh, natural Strong taste, high commodity value.

4, pick seeds. There are two kinds of seed production methods, adult and semi-planted. Planting seeds: Seedlings that are fully grown in the fall are easy to seed, but the cost is high and they are used when the original species is grown; Semi-plant seeding: Summer seeding and cultivation into semi-growth plants as seedlings, before winter Planting, low cost, cycle shortened by one year. Welsh onion is easy to cross pollination, isolation of seeds between varieties.

The green onions harvested in the early winter are bundled and dried in a shallow ditch at the shade. The use of low temperature below 0 °C can be stored for more than 100 days, during storage to keep the onion bundle lightly frozen, and avoid repeated thawing. The air humidity should be about 80%, which can cover the grass moisturizing rain. Onion has no natural hibernation characteristics. Although pseudostems can be stored for a long time at room temperature, they are very expensive.

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