The season of onions, when to plant onions

The onion planting time is generally 1-2 days before and after the "white dew", and the seedlings are most suitable.

Key points of onion high-yield cultivation technology:

1. Select the plot of land with flat terrain, good watering conditions, groundwater salinity below, neutral soil and high fertility, sandy loam soil and no heavy stubble.

Second, the selection of varieties to choose the United States improved 502 shallots.

3. Seedling 1The time is generally 1-2 days before and after "white dew", and the most suitable time is to raise seedlings. Too early is more likely to have underripe sprouts, and too late is likely to reduce yield.

2.After sowing the furrow and filling enough water, after water infiltration, the seeds and fine sand soil are mixed and sown in a ratio of 1:10, covered with fine soil after sowing, the soil thickness is about 1 cm, and the phosphine granules are sprinkled after covering the soil to prevent underground pests.

The amount of seed used in the seedbed is 2 kilograms, and about 25,000 seedlings are produced. 3.When the height of the seedlings is 4-5 cm, the seedlings are kept at a distance of 3-4 cm.

4. Colonization 1The time is generally around late October (frost fall) is advisable. 2.

5,000 kg of decomposed organic fertilizer, 50 kg of diammonium phosphate, 50 kg of superphosphate per mu of land preparation, 30 cm deep after fertilization, combined with soil preparation spray fluoralin emulsifiable concentrate to control weeds, and sprinkle octathion granules to control underground pests. 3.Seedlings with a height of about 20-25 cm, a stem thickness of about 1 cm (not more than 1 cm), and 4-5 leaves are selected.

If the seedlings are too large, it is easy to cause sprouts and flowering; The seedlings are too small and are prone to freeze to death during overwintering. 4.The density row spacing is 20 cm, and the plant spacing is 15 cm.

5.The depth should be to bury the small bulb by 1 cm and not bleaching the seedlings after watering.

5. Management after planting to before regreening Watering immediately after planting, and timely cultivation after water infiltration. Pour enough frozen water (mid-November) and cover with mulch before freezing. Do a good job of protecting the film in winter, and plug the holes in time to prevent frozen seedlings.

Sixth, spring management.

1. After breaking the film and releasing the seedlings in spring, the seedlings should be released from under the film in time, and the seedlings should be pressed with wet soil in time to avoid the evaporation of water under the film.

2. After 30 days of water and fertilizer management, fertilizer and water management should be carried out to keep the ground moist and not dry and cracked. Water about 4-5 times until harvest, and top dressing should be done every time.

3. Pest control with 40% dimethoate emulsifiable concentrate 800 times solution to control leaf miner pests, double Bordeaux liquid to control shallot purple spot disease, 60% ethylphosphine aluminum 500 times solution plus spreading agent to prevent and control downy mildew.

7. Timely harvest 15 days before maturity, spray 400 times of green fresh vegetables to prevent germination during storage. Stop watering 10 days before ripening to prevent rotting after harvest. When the plant is lodging and the bottom 3-4 old leaves turn yellow, it indicates that the shallots are ripe, and the harvest begins on a sunny day.

Onion planting time can be selected between September and October, the most suitable time is recommended after the middle of September, when the weather in most areas is cool, the germination rate is higher, if the planting is increased, the temperature is higher, and the germination is slower.

Before sowing onion seeds, it is best to turn them over, then soak them in warm water at 50 degrees, and at the same time knead to remove the waxy layer, and then you can consider raising seedlings.

After the onion is sown, the field management is done at 2 points, which helps to increase the yield and harvest.

1. Fertilizer and water management.

Generally speaking, the soil moisture content of 70%-80% is the optimal growth humidity of onions, which is conducive to the development of onion roots into strong roots on the one hand, and helps to maintain the ground temperature on the other hand, so that onion seedlings can safely overwinter.

In addition, at the beginning of spring of the next year, the watering of the field should be delayed appropriately to avoid prematurely lowering the soil temperature and causing the onion to appear "dry tip". At the same time, if it is found that there is an exposed soil surface in the underground part after watering, it is also necessary to cultivate the soil in time.

Under the condition of sufficient base fertilizer, top dressing can be avoided before wintering, so as to avoid excessive nutrients to promote the vigorous growth of seedlings, which is not conducive to safe wintering. After the beginning of spring, combined with watering back to green water, 5 kg of urea + 10 kg of potassium sulfate + 25 kg of superphosphate can be applied per mu to promote the rapid return of seedlings to green and hair.

When the onion seedlings grow to 8-10 leaves, the underground bulb begins to expand, which is the critical period of top dressing, and 20-25 kg of ammonium phosphate + 10-15 kg of potassium sulfate can be applied per mu. Every time you water in the future, you can apply an appropriate amount of nitrogen fertilizer and potassium fertilizer, but you should not apply more nitrogen fertilizer in the later stage of onion expansion, so as not to be greedy for green and late ripening.

IIWeeding.

During the onion growth period, the weeds in the field should be pulled out in time so as not to affect the soil nutrients and growth space required for onion growth.

If it is found that the onion has prematurely sprouted after the beginning of spring, it needs to be sharpened in time to promote the normal growth and development of onion fruits in the underground parts.

When the stems and leaves of the plant turn yellow and begin to lodging, it means that the bulbs (onion fruits) in the ground are ripe and it is time to harvest. Generally speaking, it is not advisable to water the onion half a month before harvesting to avoid perishable fruit during storage.

Production on cultivated onions has a strict seasonality. In the Yangtze River Basin, onions are generally sown in autumn and harvested in summer, that is, seedlings are raised in the open field in autumn, planted before winter, sown in mid and late September, and planted in late November, and the seedlings are safely wintered in the open field. It grows vigorously in the spring of the second year, and the bulbs are harvested after the bulbs are fully expanded in the summer; In North China, autumn sowing is mostly carried out, seedlings are planted before winter, overwintered in open conditions, and harvested in the summer of the following year. In Northeast China, it is mostly sown in autumn, overwintering in the form of seedling pseudo-planting, planting in spring, and harvesting in summer.

Seedlings can also be raised in protected areas in early spring, planted in spring and harvested in summer. In South China, autumn sowing is mostly planted in autumn, and harvested in the spring of the following year.

Onion sowing in autumn should choose a suitable period, sowing too early, the seedlings are too large, and the early sprouting rate in the second year increases; If the sowing is too late, the seedlings are too small, the overwintering ability is poor, the overwintering is susceptible to freezing, the survival rate is low, and the growth period is shortened, the bulb can not be fully expanded, and the yield is also low. According to the test, the seedling age is 50 55 days before the general wintering and freezing, because the seedling is easy to take root at this time, and the recovery growth is fast after transplanting, the seedling grows to the stem thickness centimeter, the single seedling weighs about 4 6 grams, has 3 4 leaves, and the plant is as high as 18 24 cm. In this way, the early budding rate is low, and the bulb yield can be higher.

Hello, onion planting time can be selected between September and October, the most suitable time is recommended to be after the middle of September, before the onion seeds are sown, it is best to turn them over, and then put them in warm water of 50 degrees for soaking, while kneading to remove the waxy layer, you can consider seedlings.

OK. You can learn about what you need to pay attention to.

1. Sowing and raising seedlings: when sowing, the seedbed is required to be loose and fertile, with strong water retention capacity, about one kilogram per mu, covered with a layer of soil or plant ash after sowing, and then covered with a layer of straw or wheat straw and watered. Keep the soil moist and after 8-10 days the seedlings can be unearthed, and then the mulch will be removed.

Qi seedlings enter the time seedlings later, and pull out some dense seedlings and inferior seedlings. Properly control water and fertilizer at the seedling stage to avoid the seedlings being too large during planting, resulting in early sprouting. 2. Colonization:

Onion planting is carried out before the arrival of the cold season, the southern region is generally planted in November to early December, seedlings should be graded when planting, planting at the same level together, the larger plants can be properly controlled fertilizer water, and the smaller ones should be properly fertilized with water. Generally, 17,000-20,000 plants are planted per mu, with a row spacing of 20-26 cm, a plant spacing of 13-17 cm, and a planting depth of about 3 cm. 3. Field management:

During the overwintering period of onion seedlings, the growth of the whole plant is small, the amount of fertilizer absorption is small, the temperature rises in spring, the plant begins to grow, and a heavier fertilizer must be applied. From late March to early May is the season of vigorous onion growth, fertilization should be applied 1-2 times, and 200 kg of human and animal manure or 5-10 kg of urea and 5-8 kg of potassium sulfate should be applied per mu. When the onion bulb is enlarged and close to maturity, the water and fertilizer should be stopped**, and it needs to be watered in time when there is a drought.

The root system of onions is shallow, and the cultivation and weeding can only be carried out in shallow medium cultivation, and the depth of cultivation should not exceed centimeters.

Questions. Is it okay to plant onion seedlings now?

Yes, now customized.

Fixed value. Questions.

The lowest temperature at night is 1 to 2 degrees Celsius below 0.

Is it okay to buy seedlings now?

Is it okay to buy seedlings now?

Yes, onions are low-temperature crops and are not resistant to high temperatures.

Questions. Okay thank you.

Smile] and have a great time in life.

The strength and neatness of onion seedlings directly affect the yield and quality, and raising healthy onion seedlings is the most critical step in onion planting.

First, the sowing time (Yuhao seed wholesale to give cultivation technical guidance).

The selection of sowing date plays a crucial role in onion seedling, and the sowing date is too early, and the seeding is too late, and the market is delayed and the yield is reduced. The seedling period of Feihong Star and early maturing Zibao is tentatively set between September 10 and September 15, and those with fertile land and rich management experience can choose No. 14 and No. 15, and those with poor soil fertility and slightly poor management experience can choose No. 10 and No. 11. The seedling period of Zhuanghan Zibao is tentatively set between September 15th and September 20th, the land is fertile and the management experience can choose the 18th and 19th, and the poor soil fertility and the management experience is slightly worse can choose the 15th and 16th seedlings, such as sowing after the 20th, and the small arch shed needs to be covered.

Second, the seedbed selection (their own warehouse at any time to deliver at any time).

1.The seedbed should choose fertile land and plots where crops grow vigorously.

2.The terrain should be flat, and there should be no low-lying places, and the onion seedlings in low-lying places grow very poorly. 3.Choose a plot that is convenient for watering, and it is necessary to be able to water in drought and drain in waterlogging. 4.Choose plots with fewer weeds, especially those with less malignant weeds.

5.Strictly prevent pesticide damage to the residual plots, and the plots with high residues of herbicides can not be used (such as herbicides for the treatment of fragrant aconite and notoginseng buds, etc.), and a large number of plots with excessive frustration and arthrochlor can not be used.

6.It is necessary to have enough time to dry the ground, avoid sweet potato stubble, pepper stubble, chrysanthemum stubble and other seedlings that are harvested and raised, and if they must be used, they need to be rotated and dried one month in advance.

7.Seedlings in heavy stubble or old vegetable fields should be treated with soil before sowing, and bacterial fertilizer or biological inoculants should be applied after sowing.

8.The ratio of seedbed and transplanting land is 1:15, that is, 15 acres of seedlings are raised on one acre of land.

The ground needs to be raked with a small four-wheeled through). In case of heavy rain a few days before sowing, the furrow surface needs to be covered with plastic film to avoid the soaking date of the furrow surface and the soil being too wet, and light rain can not be covered.

4. Sowing: sowing is divided into four types: wet sowing, dry sowing, precision seeding machine sowing and rope sowing.

1.Wet sowing: first water the beaten furrow twice, wait for the water to seep down, and then evenly spread the seeds on the furrow surface, then cover the soil about centimeters, and finally cover the non-woven fabric, and untie the non-woven fabric in time after the seedlings emerge. (Note: The thickness of the cover soil must be mastered, and it is better to be shallow than deep).

2.Dry sowing: sprinkle the seeds evenly into the flat furrow surface, gently pull it shallow with a vegetable rake, and then manually step on it or compact the seeds with rollers, so that the seeds can not be seen on the surface, and then cover the non-woven fabric with a fog tube to water, water the small water frequently when watering, the furrow surface can not store water, and the non-woven fabric is uncovered in time after the seedlings emerge.

Budding rate, about 7-10 days after the sprouts are unearthed, the non-woven fabric is removed in time.

3.Watering in time: The surface of the onion needs to be kept moist after sowing, that is, it should be watered frequently with small water and watered thoroughly, not wet and dry, and the surface can not gather water or dry.

4.Rain and waterlogging: In case of heavy rain before the emergence of onions, it is necessary to cover the plastic film to prevent budding, and remove the film in time after the heavy rain.

How to plant onions 1, planting time onion likes warmth, it is not resistant to high temperatures, according to its habits, it is generally the most suitable to plant onions in early September, the climate at this time is conducive to its germination and growth, otherwise it is planted too early, it is easy to moss after wintering, if it is planted too late, the bulb of onion will be smaller, and the yield will be lower. 2. Before planting onions, you need to turn the selected plot deeply, and apply a sufficient amount of rotted farmhouse fertilizer in the soil, and the depth needs to be more than 20 cm when turning deeply, so that the fertilizer and the soil are fully mixed evenly, and then the soil is leveled and raked finely, and the ditch can be prepared for planting after digging a ditch. 3. The planting method will water the soil thoroughly to make the soil in a slightly moist state, and then evenly spread the onion seeds into the soil, and cover a layer of thin soil of about centimeters, and the onion seeds can germinate after a period of time, and the seeds can also be soaked and germinated before sowing, which can improve its seedling rate.

4, maintenance management onion planting needs to do a good job of maintenance management, it is necessary to pay attention to the prevention and control of diseases after the emergence of seedlings, wait until mid-October onion seedlings grow stably, you can carry out planting, planting row spacing 20cm, plant spacing 16-17cm, planting after watering a rooting water, in order to facilitate its rapid survival. FYI.

Answer: shallots can be planted in spring and autumn every year, when planting, you need to choose fertile and loose, good air permeability humus as the base soil, and then grow healthy shallots with the tip up, planted in the soil, after planting, you can water the soil with pollution-free river water to help the shallots adapt to the environment and resume growth.