How to grow green onions to get high yield?

With the rapid economic growth, people's living standards continue to improve, and the consumer demand for green onions in the market has also expanded accordingly, with the annual demand growing steadily. The area for growing green onions is also expanding year by year, and it has become the dominant industry in some areas. Let’s learn together how to grow green onions to achieve high yields.

1. Crop rotation and land selection

Scallions should not be planted continuously. There is a folk saying that goes "If spicy vegetables are planted together, they will definitely go blind; onions, leeks and garlic will never meet", which means that scallions cannot be planted continuously with themselves or other Allium plants such as garlic and leeks . Green onions can be rotated or intercropped with crops such as cabbage, eggplant, winter melon, watermelon, and cabbage. The land for growing green onions should be clay soil or clay rich in organic matter.

2. Sowing and Seedling Raising

1. Fertilization and land preparation: Choose a plot of land where onion and garlic crops have not been planted within 3 years. The soil should be loose, fertile, neutral and slightly alkaline. Apply 5,000 kg of high-quality organic fertilizer, 50 to 75 kg of superphosphate, and 40 kg of urea per mu. After deep plowing and harrowing, make flat beds 1.3 meters wide and 7 to 10 meters long.

2. Sowing time: mainly divided into autumn sowing and spring sowing.

Autumn sowing: Onion seedlings need to overwinter in the open field. The seedlings should not be too old, so as not to be affected by low temperatures and cause early spring sprouting; nor should they be too late, so as not to be frozen to death before they have less than three leaves. The suitable seedling age is to have 2 to 3 true leaves before wintering and the plant height is 10 cm.

Spring sowing: The sowing period should be between Jingzhe and Qingming. Spring-sown seedlings enter a vigorous growth period after germination and are not easy to sprout.

3. Sowing: The skin of green onion seeds is thick, the embryo is small, the germination is slow, the seedlings are thin and weak, the root system is underdeveloped, the growth is slow, and the seedling period is long. For ease of management, seedling transplanting is usually adopted.

Seed amount: The seed amount for autumn-sown nursery fields is 1.5 to 2 kilograms per mu, which can be used to plant 4 to 5 mu of land.

Seed treatment: Dry seeds are usually used for autumn sowing. Seed soaking and disinfection before sowing can improve germination rate and uniformity of seedling emergence and prevent diseases.

During spring sowing, in order to advance germination, wet sowing can be used. Wash the seeds with warm water, remove the dead seeds, soak them for 12 to 24 hours, and then germinate them at 15 to 20℃ for 2 to 3 days. Sow them when most of the seeds are white.

Post-sowing management:

A. Watering and fertilizing: Keep the ground moist to ensure normal emergence of seedlings.

B. Spray herbicides : Suitable for spring sowing. Spray herbicides evenly within 2 to 3 days after sowing.

C. Thinning: Do it twice. The first time is when watering in spring, with the seedlings 2 to 3 cm apart. The second time is when the seedlings are 18 to 20 cm tall, with the seedlings 6 to 7 cm apart.

D. Disease and pest prevention: prevent and control diseases and pests in a timely manner.

E. Cultivate strong seedlings: The standard for strong seedlings is that the seedling height is about 50 cm, the green onion length is about 25 cm, the leaves are dark green, there are 5 to 6 leaves, and the single plant weight is more than 40 grams.

3. Planting

When the green onions grow to 40 to 50 cm in height, they should be transplanted and the tillering plants should be removed in time.

Planting period: The planting period of autumn onion is closely related to the yield.

Site selection and land preparation: The planting plot should be similar to the nursery plot, but attention should be paid to good drainage.

Apply sufficient base fertilizer: 5,000 kg of high-quality fertilizer, 50 kg of superphosphate, and 30 to 40 kg of compound fertilizer per mu.

Seedling grading: Water once 2 to 3 days before seedlings are transplanted to keep the soil moist.

Planting seedlings: Plant in different grades, different sizes.

Density: 13,000 to 16,000 plants per acre in high-yield fields.

4. Post-planting management

1. Management during the seedling growth period: After planting, the old roots quickly rot, new roots sprout, and new leaves begin to grow.

2. Management during the peak period: After the beginning of autumn, the weather is cool and the temperature difference between day and night is large, which is suitable for the growth of onions.

①Operation procedure: Starting from the beginning of autumn, top dressing, soil cultivation and watering should be carried out once every solar term.

②The effect of soil cultivation: increase the height of the plant, the length and weight of the green onion.

③ Note on watering: Water in the morning and evening between Beginning of Autumn and White Dew, but not too much; keep the ground moist from White Dew to Autumnal Equinox; when the average temperature drops to around 15℃, water once every 6 to 7 days, and water thoroughly each time.

④ Stop watering one week before harvesting to promote tissue enrichment.

The above is an introduction to the key points of green onion cultivation. When planting green onions, you need to pay attention to all aspects of the problem, so that there is a chance to achieve high yields.