How to choose the seed of spring onion? What are the methods of raising seedlings?

Spring onions, also known as chives, is the most common seasoning vegetable, the vitality is very tenacious. Spring onion cultivation has a long history and widely distributed in China, with Shandong, Hebei, Henan and other provinces as important producing areas. So how to choose spring onions? What are the methods of raising seedlings? Next, let's have a look with the editor.

First, how to choose the seeds of spring onions?

The green onion seed is very small and light, the seed coat is very thick, and the seed embryo is very small, and there are few nutrients accumulated in storage. in general, the slow absorption of water leads to slow seedling emergence, few roots, thin and weak seedlings, slow growth and long seedling age. Therefore, vegetable farmers will adopt the methods of seed treatment and seedling transplanting to improve the germination rate and emergence rate, save land and manpower.

Choose the seeds within a year. Select a new species as the seed. Before sowing, the selected seeds should have a purity of more than 99% and a germination rate of more than 90%. Spring onion seeds are small, the nutrient content is low, and the germination ability is weak. The germination rate of seeds more than 2 years old is reduced to less than 30%, which can not be used as seeds. Generally speaking, one mu of land needs 3-5 kilograms of new species.

Second, what are the seedling methods of spring onions?

1. Selection of nursery sites

Choose a place with high and dry terrain and convenient drainage and irrigation. The seeds of chives are small, the seedlings are weak, they are not resistant to waterlogging, and they are afraid of stagnant water, otherwise the seeds are easy to rot and the seedlings are easy to grow. Under drought conditions, the germination rate is low and the growth is difficult.

Choose a place with plenty of sunshine and no cover. Choose the leeward to the sun, there is no shady place, is conducive to the cultivation of strong seedlings, but also can prevent raindrops slapping caused by the phenomenon of stagnation.

The sandy loam with loose soil, good ventilation, fertile soil and rich organic matter is the best. The clayey and heavy soil is easy to harden, which is not conducive to root development and affects the emergence rate. The fertility of sandy soil is too low to stabilize seedlings.

2. Seedling season

Small chives are resistant to high temperature and low temperature, and are evergreen all the year round. The most suitable growth temperature of chive is 18-23 ℃. The high degree of fibrosis in high temperature season will lead to poor growth and poor quality, and the growth will stop if the temperature is too low. Therefore, it is very important to determine the appropriate seedling season to control the growth period in the most favorable season. Under the condition of low temperature, plastic film cultivation and greenhouse cultivation can be used. In high temperature season, straw can be applied to maintain soil moisture, reduce soil temperature and cover with sunshade net to maintain perennial product supply.

The most conventional seedling raising season in northern China is when the soil thaws in spring and the temperature begins to drop in autumn. Under normal circumstances, spring open-field seedlings can be transplanted or sold within 2 months, and are gradually supplied to the market before and after transplanting before and after wheat harvest. Because of the strong tillering ability of chives, the cultivated plots can continuously supply seedlings to the market without reducing the yield until autumn. The Beginning of Autumn can be transplanted in about one month before and after sowing, and can be supplied to the market one and a half months after transplanting.

Cultivation in southern areas and protected areas can sow seeds all the year round and harvest products all the year round. Seedlings can be raised in protected land in winter and transplant covered with plastic film in early spring. In summer and autumn, seedlings can be raised under shade and rain-proof sheds, and transplant when the temperature drops.

3. Seedling management

Ridging and raising seedlings. In order to ensure a well-developed root system and prevent rotting roots, high ridges should be adopted to raise seedlings in any season. The ridge height is more than 20 cm, and the ridge width is flexibly selected according to the soil and topography.

There is plenty of fertilizer at the bottom. The rotten high-quality farm manure 4000kg / mu and calcium superphosphate 50kg / mu were applied as base fertilizer.

Sowing method. There are mainly two kinds: broadcast and spread. Sow seeds after ridging and cover the soil by 0.5 cm. The covered soil is too thin and unearthed with a shell, and it is too thick to produce seedlings. Then irrigate, sprinkle or water, according to the season and soil texture. If the temperature is right, the seedlings will emerge in 5-7 days, and generally in 10-15 days in spring. If you find that there are many shells, you can spread rotten farm manure properly.

The above is the introduction of spring onions, the south is rich in green onions, is a commonly used seasoning, also known as chives, is generally raw food or mixed with cold dishes. When planting spring onions, we must choose good quality seeds and manage them scientifically.

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