Autumn sowing and Seedling raising technique of Welsh Onion

Spring onion seedlings sowed in autumn generally sowed in early September, early vernalization and bolting, too late easy to freeze to death; before overwintering, the seedlings have 2-3 leaves, the plant height is about 10 cm, and the base of the pseudostem is less than 0.5 cm. Seed treatment: soak the seeds in clear water for 10 minutes, remove the impurities from the blighted seeds, then blanch the seeds in warm water at about 65 °for 20 minutes and stir continuously. Seed soaking can be unearthed 2 days ahead of schedule.

Sow:

If you use the new seeds of the current year, the sowing amount of 3mur4 kg per mu can be used for planting 6 Mu and 8 mu of land; if you use the old seeds of the previous year, you should more than double the seed consumption, and the seeds of more than two years can no longer be used. Sowing and strip sowing can be used when sowing. The seedbed is filled with enough bottom water, sow evenly, and then cover the fine soil about 1 cm. Strip sowing is in the border according to 12 cm row spacing 1.5 li 2 cm deep shallow trench, seeds sown in the ditch, cuddle strict border surface. Management: keep the seedling bed moist before and after emergence to ensure that the seedlings are unearthed normally. After emergence to overwintering, generally do not dry do not water, according to the use of base fertilizer and seedling growth watering and fertilization. Pour frozen water once before freezing. In the following year, when the average temperature of green onion seedlings rises to 13.5 °, green water will be irrigated and fertilizer will be applied at the same time. After that, it will take 15 days for interplanting, intertilling, water control and squatting seedlings. Green onion seedlings should enter the vigorous growth period after squatting seedlings, which should be watered and fertilized for 3 times. Urea 20 per mu and 30 kg per mu. Seedlings: generally speaking, seedlings must be divided into two stages; autumn sowing is carried out at the slow seedling stage after being watered back to green in the second year, and the seedling distance is kept at 2mur3 cm; the second time is when the seedling height is about 20 cm, the actual seedling protection is about 140000 plants per mu. According to the above requirements, the seedling field of strip sowing can reduce the plant distance and maintain sufficient nutrient area per plant.

Cultivate strong seedlings:

The standard of strong seedling is that the height of seedling is about 50cm, the length of spring onion is about 25cm, the color of leaf is dark green, the leaf keeps 6 pieces, and the weight of single plant is more than 40g.

Pest control:

The insect pest of Welsh onion in seedling stage is relatively mild, so it should be controlled in time once it is found.