How to raise seedlings by spring sowing of green onions

Green onions, is a kind of green onions, can be divided into common green onions, shallots, shallots and floor scallions four types. Spring onion taste pungent, sexual lukewarm, with the release of yang, detoxification and seasoning, sweating bacteriostasis and vasodilation effect. Mainly used for cold, cold and fever, headache and nasal congestion, cold and abdominal pain, dysentery diarrhea, internal obstruction of insect accumulation, obstruction of milk, adverse stool and other symptoms. Spring onion contains volatile oil, which is mainly composed of allicin, dienyl sulfide and calcium oxalate. In addition, it also contains fat, sugars, carotene, vitamin B, vitamin C, niacin, calcium, magnesium, iron and other ingredients. It is a perennial herb with cylindrical leaves, hollow in the middle, fragile and easy to fold. In East Asian countries and Chinese regions, onions are often eaten as a common spice, condiment or vegetable, and play an important role in oriental cooking. On the other hand, there is a way to eat green onion dipping sauce in Shandong.

Green onion is a necessary thing in the daily kitchen, the north is mainly green onion, it can not only be used for seasoning, but also can prevent and cure epidemic diseases. It can be divided into two types according to the length of green onions. The green onion plant is tall, the onion is white and the taste is sweet, is cultivated more in the north.

Green onions are mostly used for frying and frying; the south is rich in spring onions, which is a commonly used seasoning, also known as chives, which are generally used for raw food or cold dishes. Common scallions: many varieties, good quality, large cultivation area. According to its green onion length, it can be divided into long onion white and short green onion white. Long onions are spicy and fleshy, with famous varieties such as Liaoning Gaiping scallions, Beijing Gaojiaobai, Shaanxi Huaxian Valley scallions, etc.; short scallions are white, thick and thick, and famous varieties are Zhangqiu chicken leg scallions in Shandong, Hebei, and so on. Shallots: thick leaves, white onions for pure white, strong tillering ability, light spicy taste, good quality.

Green onion is beneficial to lung and yang, perspiration, hemostasis, pain and other diseases such as dysentery, abdominal pain, arthritis, constipation and so on. Spring onions have a unique spicy taste, derived from volatile sulfide onion, which can stimulate saliva and gastric juice secretion and increase appetite. The malic acid and sugar phosphate contained in spring onions can excite nerves, improve circulation, relieve surface and clear heat. Eating spring onions regularly can reduce the accumulation of cholesterol on the walls of blood vessels.

How to raise seedlings after spring onion sowing?

1 selection of superior species

Green onions are planted with new seeds of the year with fast growth, tenacity, thick and long green onions, short growth period, no separation of onions and good commercial quality, such as Zhangqiu sycamore, Chinese giant onions, Jinzhen giant onions and Hebei green onions. It is suitable for planting in our county. Generally, the plant height is 160-180cm, the green onion is long 80-100cm, the thick 4-5cm, the fresh onion yield is 7500kg per mu, and the high-yield plot is above 10000kg.

(2) selecting land for fertilization

The seedling field chooses loam or sandy loam with deep soil layer, fertile soil fertility, convenient irrigation and arrangement, loose soil, and the plot where lily vegetables have not been planted in the previous crop. Combined with the application of high quality farm manure 5000kg, diammonium 50kg, intensive tillage and fine rake per mu of soil preparation, the soil fertilizer is fully mixed to form a border of 1m wide and 10m long, which is convenient for field management and operation.

3 chemical sowing

Spring onion sowing and seedling raising takes a short time from sowing to planting, so early sowing is very important. Our county sows seeds in the middle and last ten days of March. Generally, the sowing rate is 3mur4g per square meter of net seeds and 2.5---3.0kg per mu. The sowing method is adopted, the soil moisture is made before sowing, and after the water seeps, the seeds are evenly mixed with an appropriate amount of plant ash or fine dry soil, and sowed repeatedly for several times, which is conducive to the uniform distribution of seeds, and then cover the 0.3cm thick and fine soil; you can also sow seeds first, iron rake shallow embrace several times, and then water with your feet. The two methods are finally covered with plastic film, which can not only increase the temperature and moisturize, but also emerge seedlings as early as possible. Generally, the seedlings emerge 7 days after sowing and 2 days earlier than those in the open field.

(4) breeding and strengthening seedlings

When the onion seedlings come out to 1 / 3, uncover the plastic film to avoid burns. After the seedlings were collected, the pimple seedlings and crowded seedlings were opened, and the denser spots of onion seedlings in the border were found to ensure that each onion seedling had the same nutritional area as early as possible. During the growth period, we should adopt the management method of "one promotion", watering small water frequently, applying less fertilizer and applying more, to keep the soil moist and ensure the supply of nutrients. With the increase of temperature, the onion seedlings grow up gradually, and the demand for fertilizer and water increases, and the amount of watering and topdressing should also be increased accordingly. Generally, each watering is 30ml / mu, and urea 5kg is applied. The seedling period is also a period of weeds, which can be pulled out manually, can also be used to remove herbicides, and pay attention to the control of ground maggots. Ensure that the onion seedling population grows neatly and the individual is stout. Stop watering 7 days before planting and exercise onion seedlings, which is beneficial to slow seedlings after planting in the field.