Green onions are planted in the north for one season. When will they be planted?

The northern green onions are sown in spring (it is also possible to learn now), and can be ditched in summer and autumn when they grow to the thickness of chopsticks to fingers. 1 1 By June 5438+February, a large number of green onions were on the market. In addition, the shallots you usually eat can be planted all year round.

The following information is found for you and I hope it will be useful to you. (from Baidu Encyclopedia)

Planting method:

general requirements

Seedling planting schedule: the first crop, seedling cultivation from the end of June to the beginning of July, planting in September, and listing in March-April of the following year; The second crop, seedling raising in mid-September, sowing in March-April of the following year, and listing in early August-September.

Selection of seedling raising place: As the seedling raising time of two crops is almost in the rainy season, the plot with flat terrain and slightly higher terrain should be selected, and lily vegetables such as onion, leek and garlic have not been planted for more than 3 years.

Adequate base fertilizer: Due to the short and shallow root system of Welsh onion seedlings, the ability to absorb soil nutrients is poor. In order to cultivate strong seedlings, sufficient fully decomposed organic fertilizer and a certain amount of phosphorus and potassium fertilizer must be applied. The specific method is to apply 5,000-6,000 kilograms of decomposed and finely ground manure (except chicken, duck, sheep manure and raw human excrement and urine) per mu before plowing, and tidy up the border. Before sowing, apply 25 kg of sulfate ternary compound fertilizer.

Intensive tillage, harrowing and ridging: In order to prevent underground pests from harming seedlings, after the application of organic fertilizer, poison bait should be spread again. That is to say, stir-fry 5 kilograms of wheat per mu, then mix 250 ml of phoxim diluent evenly, seal it for 3 hours, then spread it on the ground and turn it into the soil with organic fertilizer, which can kill many kinds of underground pests at one time. Ploughed land should be fully raked, compacted and leveled. Before making the border, make a furrow on one side of the ground for watering, and then make the border. Ridge width 1 ~ 1.2m, ridge width 20 ~ 23cm and height 8 ~ 10cm (stamped).

After the border is finished, sprinkle 25 kilograms of ternary compound fertilizer (N, P and K each contain 65,438+05%) in the border, then hoe it thoroughly and level it, and then sow it in your hands.

Sowing seeds with a yield of 3-4 kg per mu can be done in either of the two sowing methods.

Holding seeds: spread the seeds evenly on the flat border, hold the seeds carefully with a rake after sowing, so that the seeds are fully mixed with the soil, and then bury them in the soil, and then water them.

Covering soil: After leveling the boundary, remove the fine wet soil with the thickness of 1cm with a shovel, and level the boundary again.

Watering: stop watering when the water in the border reaches 6~7 cm depth. The border is soaked in clear water and then sown, and then covered with fine soil, with a thickness of about 1cm. Film-covered seedlings have deep roots, many roots and many drought-tolerant seedlings, Miao Zhuang. If we can take the method of shading and preventing rainstorm, the effect will be better. After sowing, herbicides can be sprayed when the soil is wet during manual operation.

seedling management

From the full seedling stage to the 5-leaf stage, 1~2 times of thinning were carried out. The seedling spacing is 1~ 1.5 cm. Combined with thinning, pull out weeds that can't be killed by herbicides. Control watering, no drought and no watering, and reduce the occurrence of "disease" and "yellow seedlings". If the seedlings are weak, appropriate topdressing combined with watering can be used. Apply 7.5 kg ~ 10 kg urea per mu, along with the water, once every 20 days and twice. In case of continuous rainy weather during the growing period, attention should be paid to the prevention and control of downy mildew and white blight to ensure strong seedlings.

Timely colonization

Spring onions are sown in summer in mid-September and autumn in March-April of the following year. Row spacing is 80 cm, plant spacing 1.5~2 cm, furrow planting (onion row). Before planting, onion seedlings are strictly graded, and then treated with chemical agents to eliminate root maggots (fly maggots) and ensure the whole seedlings. Specifically, the roots of onion seedlings were soaked in 4,000 times diluted 1.8% iprodione solution, 800 times diluted1000 times diluted phoxim solution or 3,000 times diluted beta-cypermethrin solution for 2-3 minutes. Planting ditch should not be too deep or too shallow, too deep, dead soil layer is not conducive to root growth; It is difficult to cultivate after the soil is too shallow. After the planting ditch is opened, the newly turned virtual soil should be slightly pressed to prevent the collapse from overwhelming the onion seedlings in the future. After the onion seedlings are arranged in the ditch, an appropriate amount of root fertilizer should be applied. It is best to use decomposed manure as base fertilizer. 5000 kg per mu and 25 kg of ternary compound fertilizer are mixed and applied. Combining with the next ditch, cover a layer of fine wet soil on the fertilizer properly. The thickness is based on adding fertilizer and soil without burying the onion core (growing point) at all, and it will be over after a little pressing. It is forbidden to water newly planted onion seedlings to prevent retting from producing a large number of dead seedlings.

Tiantuan management

After planting, the temperature is the most suitable period for the growth of green onions. Fertilizer and water management is an important link for high yield and high quality. If sufficient root fertilizer is applied as required, there will be no shortage of fertilizer before the middle growth period, and as long as the soil humidity is suitable, rapid and robust growth can be guaranteed.