How to grow onions in "vegetable queen"?

Onion is a common ingredient in our daily life. it is delicious with all kinds of meat and has many effects. it is a healthy vegetable with good market prospects. So, how do you grow onions? Let's get to know it.

I. cultivated varieties of onions

1. Red onion

The onion of red onion is purplish red in appearance, the fleshy scale is slightly reddish or pink, the onion is oblate or spherical, with a diameter of about 10 cm, and has the characteristics of resistance to storage and transportation, short dormancy period and early budding. this variety of onion is generally harvested from late May to early June and is cultivated all over East China.

2. Yellow onion

The onion of yellow skin onion is brass to light yellow, the scale is fleshy, the color is yellowish, the flesh is soft, spicy, the onion body is oblate, slightly smaller than the red onion, 6-8 cm in diameter, resistant to storage and transportation, the yield is lower than the red onion, but the quality is better.

3. White skin onion

The onion of white skin onion is white, the scale is fleshy, white, the onion body is oblate and spherical, some are high round and spindle-shaped, the smallest, about 5 cm in diameter, good quality, but low yield, weak disease resistance, early autumn sowing in the Yangtze River basin, easy to bolting in advance, so the planting area is not extensive.

II. Planting conditions of onions

1. Temperature

Onion has strong adaptability to temperature, seeds and bulbs can sprout slowly below 5 degrees, the suitable temperature for seedling growth is about 15 degrees, strong seedlings can tolerate the low temperature below 8 degrees, and the bulb expansion period needs higher temperature. But the growth should not stop when the temperature is too high.

2. Lighting

Onions belong to long-day crops, so they have higher requirements for light. In the bulb expansion period and bolting and flowering period, they need more than 14 hours of long-day sunshine every day to grow normally. If it is a condition of high temperature and short-day sunshine, there will be only long leaves but no onions, so it is easy to plant in places where the sunshine is long.

3. Moisture

Onion should provide sufficient water in germination stage, seedling growth stage and bulb expansion stage, but water should be controlled in seedling stage and before overwintering to prevent overgrowth of seedlings. Onion seedlings are more resistant to drought and humidity is about 60. Too high air humidity is prone to disease, so you can't overwater it.

4. Soil

The adaptability of onion to soil is strong, and general soil can be planted, but the neutral loam with loose fertility and good ventilation is the best, do not worry, other soil types can also be planted, the ability of onion root system to absorb fertilizer is weak, high yield needs adequate nutrition, regular fertilization.

3. Seedling raising techniques of onion

1. Sowing time

Onion planting should choose a suitable sowing time, early sowing seedlings, easy bolting after overwintering, weak late sowing seedlings, poor cold resistance, small phosphorus stem and low yield. The best sowing time in the Yangtze River basin is in early September.

2. Sowing quantity

Under normal circumstances, the sowing amount of onion in the nursery bed is 4-5 kg per mu, neither too much nor too little, so it should be planted in close density reasonably.

3. Fertilize the border.

The border is 1.4 to 1.5 meters high and 27 centimeters wide. after leveling the border surface, 15 kg of phosphorus and calcium per mu, 4 square of mature organic soil fertilizer per mu as base fertilizer, and 10 kg urea per mu combined with watering after emergence.

4. Sowing method

After leveling the border surface, first watering, and then evenly sowing, sowing and then covering 0.8 cm of nutritious soil, if the soil moisture is not good after sowing, spray water can be used to promote seedling emergence, or sprouting and sowing.

5. Disease control

Onions should be sprayed with 50% carbendazim or 40% chlorothalonil to prevent and cure mold and blight after emergence.

The above is the onion planting method summarized by Tuliu.com for you. I hope it can help the growers.