The planting method of "vegetable queen" onion

Onion is one of the main vegetables grown in China, known as the "vegetable queen", rich in nutritional value, the economic value of growing onion is also very high. So, what are the ways to grow onions? Let's introduce them one by one.

I. planting conditions of onions

1. Soil quality

Onions have low requirements for soil quality and strong adaptability. The soil for growing onions is preferably a neutral soil with loose soil and good air permeability, and sandy soil is the best. In addition, the root system of onion has weak fertilizer absorption capacity, so regular fertilization is needed to ensure nutrient absorption.

2. Moisture

Onions have a large demand for water during germination, seedling growth and bulb expansion, but we should pay attention to controlling water during overwintering and seedling stage. in addition, soil moisture should be controlled at 60% and 70%.

3. Lighting

Onion likes light and belongs to long-day crop, especially in bulb expansion period and bolting and flowering stage, it needs more than 14 hours of light. The longer the light time, the better the growth of onion rhizome.

4. Temperature

Onion growth requires a low temperature, and the suitable temperature for seedling growth is 10-20 degrees Celsius. Even in winter, strong onion seedlings can survive the winter even at this temperature below zero.

2. Seedling raising techniques of onion

1. Sowing time

The sowing time of onions varies from region to region, but generally speaking, too early and too late is not conducive to the growth of onions. Taking the central region of China as an example, the best time for onion sowing is in mid-early September.

2. Sowing quantity

Under normal circumstances, in order to ensure the yield of onions, the seeding amount of onions per mu is 4-5 kg, which should not be too much.

3. Fertilize the border.

The height of the border is 1.5m and the width of the border is 27cm. After making the border, organic soil fertilizer, phosphorus fertilizer and nitrogen fertilizer are applied and then watered. After emergence, 10 kg of urea was applied per mu.

4. Sowing method

Onion sowing row spacing of about 10 cm, evenly sow seeds, cover a layer of soil about 1 cm thick, appropriate amount of irrigation. After emergence, water an appropriate amount of water again. At the same time, some antibacterial and anti-insect drugs were sprayed.

III. Field management of onions

1. Watering

When onion seedlings are first planted, they should be watered frequently and less water each time, so that onion seedlings can grow faster. Onion planting 20 days after entering the slow seedling stage, at this time to control the amount of watering, not too much watering, otherwise it will slow down the growth of seedlings.

2. Fertilization

Onion needs a large amount of fertilizer in the period of leaf growth and bulb expansion, so it is necessary to apply fertilizer and topdressing in time, otherwise the lack of fertilizer for onion growth will lead to thin and withered rhizome, and the fertilizer requirement of onion per mu is 13-15kg of nitrogen, 8-10kg of phosphorus and 10-12kg of potassium.

3. Loosen the soil

During the onion growing period, the soil should be loosened frequently to ensure the soil permeability, 3-4 times in the seedling stage and 3 times in the stem and leaf growth period.

4. Removing bolting

For the early bolting onion, in order to reduce the nutrient consumption, it is necessary to de-bolting before the bud formation, so that the onion can get more adequate nutrients in the later stage.

Onions should be preserved after harvest. They can be stored in cold storage or hung indoors after drying.

The above is a brief introduction to the method of growing onions. Do you understand?