Where are the green onion planting techniques?

Where is the green onion planting technology? What are the steps for growing green onions? Also ask experienced netizens to help introduce the planting techniques of green onions arranged by the farming network. The following planting steps are listed for netizens' reference. Step 1, preparation before sowing green onions: the choice of green onion fields: green onion seedling beds, flat terrain; fertile land, convenient irrigation and drainage, and deep clayey soil, stubble should be selected for three years without planting onions, onions, garlic, leeks or rotation with food crops, such as millet and corn stubble. Land consolidation and bed before planting: seedling beds should pay attention to the application of rotten soil and miscellaneous fertilizer as base fertilizer, with 2500 kg per mu, shallow ploughing and 2.5cm depth, flat and fine. The length and width of the border are determined according to the water source conditions. Generally, the border is 20-30 meters long and 1-1.2 meters wide. Step on the ridge, the width of the bottom of the ridge is 25 cm, and the edge of the ridge is split. In order to speed up the sowing progress, we can start from the middle of the plot, start with soil and cover the soil, and place the outermost border on both sides of the plot. According to the application of 15 kg compound fertilizer or 5 kg urea per mu as seed fertilizer, spread two rows of fertilizer to be sown in the middle first, mix the fertilizer soil evenly, hold flat and hold thin, put water steadily to the end, pour it evenly, and sow seeds when underwater seeps. Step 2, the choice of green onion seeds and sowing time: the selection of green onion varieties can choose popular varieties such as "hybrid fast onions". The sowing time of Welsh onion should be carried out according to the product requirements, in order to cultivate strong seedlings, it is very important to determine the optimum sowing date, which has been proved by practice, and the average temperature is 16.5-17 ℃. 2-3 days before and after October 1st. For the optimum sowing time, determine the seedling size from before overwintering. It is easy to freeze to death if it is older than it is in the spring of next year. The seedling before winter is standard to grow to two leaves with one heart. Spring sowing begins at the beginning of spring (late February and early March). Sowing method of Welsh Onion: before sowing, Welsh onion seeds need to be soaked. Soak the seeds in water for 10-12 hours and then remove the cool powder. Water immediately before sowing and sow seeds immediately after underwater infiltration. Spread seed 1.5 kilograms per mu and spread seeds back and forth for three times. After sowing, cover the soil with a thickness of 1 cm. Under certain conditions, you can cover it with a piece of straw during the day, lift it at night, and ask for 5-7 days. Step 3, the management of green onions before and after emergence: green onions generally emerge in about 7 days in autumn and 10-20 Tianshan seedlings in spring. After emergence, iron rakes can be used to cut the land lightly and shallowly in case of rain. Management of green onions before winter: in order to cultivate strong seedlings, water can be watered 2-3 times according to soil moisture, and once anti-freezing water before freezing. In early December, the miscellaneous fertilizer prepared in the morning is sprinkled thinly, which can not be too thick to ensure that the seedlings can survive the winter safely. In the first ten days of March, weeds should be pulled out, green water should be poured back in the last ten days, interseedling should be carried out 1-2 times in April, and the distance between seedlings should be kept at 4 cm. The large seedlings in the dense place should be filled to the missing seedling, and water should be watered once and 2-3 times from the beginning of May to the end of May. Period question combined with watering and chasing secondary chemical fertilizer. Apply 25 kg of carbon an or 10 kg of urea per mu. Special attention should be paid to the control of onion thrips and latent leaf rope at seedling stage. Stop watering half a month before transplanting. Step 4, preparation before setting value of green onions: preparation of cultivation land before green onions transplanting: immediately after wheat harvest, ploughing and turning fine, according to the ditch width of 80 cm, ditch depth of about 30 cm, per mu of cooked rot on the application of miscellaneous fertilizer. 5000 kg, diammonium 30 kg, potassium sulfate 15-20 kg, it is better to apply multi-element compound fertilizer, 3-5 kg methamidophos particles. After the fertilizer is applied to the bottom of the ditch, the depth of the plane is 25-30 cm to form a pine upper layer in which the fertilizer is fully mixed. Green onion seedling method and disinfection method: before the seedling is dry, the ground should be watered two days in advance, and the root should be deeply planed to strictly prevent the injury caused by hard pulling of a single plant. Miscellaneous plants, bolting plants and disabled plants will be eliminated at any time in the process of seedling emergence. The method of disinfection of green onion seedlings is 5 kg a bundle, soak the green onion roots with 40% isosalidophos emulsion water 800 times or with 15% chlorpyrifos 800 times solution for 5 minutes to kill maggots in the roots. Step 5, the planting method of Welsh onion seedlings: the choice of planting time: spring and summer, generally from mid-June to mid-July (small office) as the best period, with the small department as the control, the yield increased by 40% a month early and 30% a month later. Reasonable planting density of scallions: reasonable density is one of the central links to ensure yield. When the row spacing is 80cm, there are 20, 000, 17000 and 24000 plants in 4cm, 5cm and 3.5cm respectively. Planting method: the method of planting seedlings with water can be used, and the transplanting equipment is called onion fork (using a branch with a fork, about the thickness of the pen). Hold 7-8 seedlings in one hand, one is in the fork, and the fork is stuck in the fibrous root of the onion. Insert the straight depth in the principle of uneven upper and lower. Do not plant too deep, shallow easy to lodge, generally into the depth of about 12 cm, the ground plane to the onion root is about 20 cm, not easy to cultivate soil. Deep slow return to seedlings, stuffy seedlings are not prosperous easy to rot dead seedlings, water plug the meaning of the old name, that is, first watering, after water infiltration immediately insert seedlings, irrigate a ditch, and then pour a ditch, and then plant it in turn. Step 6. Management of Welsh onion after planting: management of slow seedling stage of Welsh onion: from planting to early August, it was high temperature and rainy during the period, coupled with root aging, decay, slow growth of new roots after planting, plant weight decreased but not increased, and was in a period of tenacious tolerance and slow growth. It has strong tolerance to drought and high temperature. Spring onions are happy crops, at this time afraid of ground hardening, hoarding water, it is easy to cause decay and lack of seedlings or even extinct seedlings, the main points in the management are as follows: first, sun onion eyes, pull out a fork to leave a hole when inserting onions, which is beneficial to ventilation and emitting water. Second, no watering, timely drainage in case of rain, strictly prevent water hoarding in the sun, timely watering with well water after drainage (vegetable farmers have a view of waterlogged garden) and timely hoe to break the knot. The management method of green onion peak period: after August, the air temperature gradually cooled, the temperature difference between day and night increased, and the growth gradually accelerated (the most suitable temperature for green onion growth was 15-25 ℃). At this time, apply 10 kg urea per mu, shallow hoe once. After watering once, the leaves entered the peak growth period in late August (around the End of Heat). 2000 kg of soil and miscellaneous fertilizer or 200kg of cake fertilizer and 15kg of urea were applied per mu. In the first ten days of September, that is, before and after White Dew, onion white entered the thickening growth period, applying 50 kg ammonium bicarbonate per mu, followed by culture, with 3 cm of centrifugal leaves on the culture. Make the ridge (ridge) into a ditch, the ditch into a ridge, pay attention to the pre-cultivation of the soil is not too high, will affect the green onion hair thick root, continuous watering. In late September (around the Autumn Equinox), the autumn is crisp and the temperature is 16-20 ℃. A new leaf will grow in 5-7 days. According to the growth law of green onions and the demand for the environment, it is the peak period for nutrients before the product is formed, so quick-acting fertilizer is applied per mu, ammonium bicarbonate 50 kg, phosphate fertilizer 30 kg, potash fertilizer 15 kg. The soil was cultivated twice during the period. Water twice. In October, the temperature gradually dropped to about 150 ℃, the growth was slow, the material accumulation was accelerated, and the product formation reached its peak. Watering is the focus of management, the ground is wet but not dry, and the leaves are full of gray transparent mucus (called "onion nose") is a symbol of water supply. Green onion harvest time: the temperature dropped to 8-120C in the first ten days of November, the aboveground part obviously stagnated, the product has come a long way, should be harvested before and after the Beginning of Winter. 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