What technologies are needed to grow leeks in rural greenhouses?

Greenhouse planting leeks, all need technology: 1. The construction of greenhouses.

When covering the shed film to build the scaffolding, the distance between the outer greenhouse and the inner arch shed should be kept at 15 20cm, and the three layers of film (including the small arch cover film in the inner layer) can not be used at the same time as the new polyethylene plastic, and the old and new should be used together. The outer layer should be made of vinyl acetate non-drip film or polyethylene dust-proof non-drip composite film. When the outside temperature drops to about 5, you can build a scaffold and buckle the film.

The greenhouse is 2 meters wide, 2 meters high, 30-40 meters long, and each shed is planted with 2 furrows.

How to grow leeks in greenhouses.

Second, how to grow leeks in greenhouses, and how to plant leeks in greenhouses.

1. The choice of leek plots. The site of greenhouse leeks should be selected with convenient transportation, good irrigation conditions, and sandy loam rich in organic matter. The furrow surface is built in the north-south direction, the furrow is wide and the ditch is wide, and it is 30-40 meters long, and a greenhouse is built every 2 furrows.

2. Seedling cultivation Cultivating strong roots is the basis for high yield. The difference between the technical measures for the production of leeks in winter and the deduction of leeks in the greenhouse after dormancy is that the manure is large and the water is diligent, which promotes its rapid growth, accumulates more nutrients, and cultivates strong roots. Live broadcast or seedling raising before and after Qingming.

The live broadcast mostly adopts strip sowing, the row spacing is 33-35 cm, the sowing furrow depth is 2 cm, the sowing width is 5 cm, and the amount of seed per mu is used; Seedling transplanting adopts sowing, seeding per mu of seedbed, and can be planted in large fields. Before sowing, soak the seeds to promote germination, the method is to soak the full new seeds in 30 degrees of warm water for 12 hours, then take them out and rinse them with water 2-3 times, and then wrap them in a clean damp cloth and put them at a temperature of 25 degrees to promote germination, 2-3 days later, when 30% of the seeds are white, they can be sown. Before sowing, water the bottom of the foot, cover the fine soil with centimeter thickness after sowing, cover the mulch film to protect moisture, when more than 10% of the seedlings out of the ground, remove the mulch film in time.

Greenhouse leek planting technology.

3. Buckle film The appropriate period of buckle film should be before the local first frost. If it is early, it grows rapidly, the yield peak comes early, and it is easy to premature aging; If the buckle is late, it will suffer from low temperature and cold injury in the open field, which is easy to cause leaf tip rot, and once the leeks turn into passive dormancy, the growth will be slow after the film is buckled.

4. Management and harvesting after film buckling. Generally, a shallow knife can be cut before the film is buckled, and the film can be buckled immediately after harvesting, which is convenient for operation. If the leeks have not yet reached the harvesting standard, the film should be buckled first to prevent frost damage, but it must be handled carefully to prevent damage to the leek plant.

In the early stage of buckle film, the indoor temperature is high, and ventilation must be strengthened to prevent growth, and it is generally kept no more than 25 during the day. As the outside temperature drops, gradually reduce the air volume, keeping it at 20 25 during the day and 5 10 at night. Later, as the external temperature drops, cover the grass and paper quilt at night, and cover it early and open it late to strengthen the thermal insulation performance.

If the growth of leeks is strong, the harvest period can be extended from October to February and March of the following year, and the leeks are removed after harvesting and the production of fruits and vegetables is carried out.

The net should be more complete, and there are many bases for large species, in short, use more organic fertilizer, cut old roots, and control pests and diseases, which is the first and foremost, and the management method is secondary. All important.

Leeks are one of the common vegetables in people's daily life, and they are loved by people because of their unique taste and rich nutrition. With the continuous progress of agricultural development technology, in order to stabilize the disease and increase the yield of leeks, many farmers choose to plant leeks in greenhouses. What are the planting techniques of greenhouse leeks?

Let's take a look! > when to plant leek seeds in greenhouses.

1. The leek planting time is after the soil thaws after the winter to the autumn equinox can be sown at any time, generally from late March to early May, it is advisable to sow in spring, and sowing in summer should be sooner rather than later. And because leeks are perennial vegetables, autumn sowing is very suitable. Therefore, the planting time of leeks is after September, and they can be sown in autumn.

2. It generally takes 10 to 20 days from seed germination to the growth of the first true leaf. The germination temperature is 15 18, the temperature is 2 3, and it does not germinate if it exceeds 20 degrees. Moreover, the ability of leeks to unearth is weak, so pay attention to the thickness of the covering soil.

3. The fertilization law of leeks: the growth and fertilizer consumption at the seedling stage are small, but the peak vegetative growth period, especially in the spring and autumn harvest seasons, the growth and fertilizer requirements are large, and a large amount of fertilizer should be applied in stages. 2 4-year-old leeks are the peak of fertilizer demand due to vigorous growth, strong tillering ability, high yield, and fertilizer demand.

Leeks that are more than 5 years old gradually enter the senescence stage, and in order to prevent premature aging, it is necessary to strengthen fertilization.

4. When the seedlings are unearthed, after the true leaves are released, the root system gradually increases, and when the seedlings have 2-3 true leaves, they can chase the seedling fertilizer once, and they should be watered in time after fertilization. When the seedlings have 4-5 leaves, they can chase the water-soluble fertilizer of the fertile leaves again. The amount of fertilizer is basically the same as that of top dressing.

Every 20 days or so in the seedling stage, fertilizer can be topped once, and drainage should be prevented from waterlogging, and the furrow surface should be kept dry and wet.

5. Timely top dressing: top dressing only after transplanting is live, and topdressing is done every 5-6 days until the beginning of harvesting, and then topdressing can be done once or twice after each harvest. No fertilization is applied during moss extraction, and fertilization is applied again after flowering to promote tillering.

Fertilization time, once a year when the leeks are stopped to be harvested, when the leeks germinate 2 4 cm, combined with the cultivated soil to apply organic fertilizer once. Nitrogen fertilizer can not be applied alone when fertilizing, the time is mastered after each harvest of leeks 3 4 days after the new leaves grow and then applied, nitrogen, phosphorus, potassium, mixed evenly, according to the ridge ditch application.

If the temperature can be properly controlled, it can be planted all year round.

Leeks cultivated in greenhouses can be grown all year round.

Greenhouse leeks can be sown in spring and autumn, spring sowing in early April, autumn sowing in mid to late September.

Leek is a perennial root-based vegetable with strong cold resistance and wide adaptability, which is suitable for greenhouse cultivation and planting. Moreover, growing leeks in winter greenhouses in the north can obtain considerable benefits. If you want to grow leeks professionally and get rich, you must master the technical points of post-sowing management of leeks in greenhouses.

Post-broadcast management. 1.Watering top dressing: combined with watering topdressing fast-acting nitrogen fertilizer 2 3 times, topdressing urea 6 8 kg per mu, generally not harvested before planting, in order to promote leek seedlings to raise roots, to reach the standard of strong seedlings when planting.

2.Strong seedling standard: the general seedling age is 80 90 days, the seedling height is 15 20 cm, there is no disease and insect in a single plant, and there is no lodging phenomenon.

3.Weeding: Manually pull weeds in time after emergence to remove diseased and disabled plants. It can also be used to control monocotyledonous weeds with herbicides such as quinoxalin and gacao, or use 30% weeding to pass 100 150 grams per mu before emergence after sowing, and spray the furrow surface with 50 kg of water.

Field management. 1.Temperature management: After the shed is closed, keep it 20 24 during the day and 12 14 at night. When the plant height grows to more than 10 cm, keep it at 16 20 during the day, and the temperature in the shed should be more than 24 to reduce the humidity and keep it above 6 at night.

2.Fertilizer and water management: after planting, when new roots and new leaves appear, you can top dressing and watering, 10 15 kg of urea per mu with water, seedlings 4 leaves, to control water to prevent growth, and strengthen cultivation, weeding.

When tillering begins at the 6-leaf stage, there is a phenomenon of root skipping, at this time, you can cover the sand, press the soil or raise the soil by ridges, so as to avoid the root system from exposing the soil surface. When the seedlings are 20 cm tall, stop topdressing and watering in preparation for harvesting. After the start of harvesting, every 1 harvest, top fertilization, after harvesting when the plant height grows to 10 cm, combined with soil, apply fast-acting nitrogen fertilizer, top application of urea 8 kg per mu.

When the weather gets cooler, you should stop watering and pour frozen water once before freezing.

Strengthen pest and disease control.

Due to the frequent watering in the greenhouse and the high humidity, attention should be paid to the prevention and control of gray mold: it can be prevented by smoking the greenhouse with Sukrin smoke agent after each watering. Epidemic:

In the early stage of the disease, 58% methalene, manganese zinc 500 times liquid or 64% alum, 400 500 times liquid spray prevention and control. Leek maggots can be treated with 90% trichlorfon 1000 times or phosphine 800 times.

Pay attention to whether the warmth of the greenhouse is perfect, renovate the land, remove weeds and dead leaves and other things, choose high-quality leek seeds, choose to cultivate the soil once after the leeks sprout, keep sufficient water for watering for a long time, fertilize regularly, and cut off the leeks only for the first time when they grow to a suitable size, and then cut them every 20 days or so.

Air humidity and high soil humidity can be guaranteed, greenhouse air humidity should be kept at 60 70%, pay attention to the soil, when the seedlings grow to 6 7 cm on the soil, pay attention to the prevention and control of pests and diseases, spray once every 7 days, spray 2 3 times, and harvest when exhaling.

Greenhouse leeks have the following management techniques: loose soil, frequent weeding, watering, fertilization, and regular cutting of leeks.

Leek is a perennial root-based vegetable with strong cold resistance and wide adaptability, which is suitable for greenhouse planting. Generally, it has returned to its roots in early to mid-November, successfully passed the dormant state, and can be deducted in early to mid-December for overwintering planting.

First, temperature management methods. Leeks like to be cold, and the appropriate temperature for growth and development is 15 to 24 degrees, and the wind is as much as possible during the day. In order to promote the budding period, the indoor temperature should be guaranteed at 18 25 degrees during the day after the shed, and the indoor temperature should be controlled at 17 23 degrees during the day after the germination period.

The temperature of the first leeks before harvesting is 15 to 22 degrees during the day and 10 to 12 degrees at night. After that, the temperature can be increased by 2 to 3 degrees for each cut, but not more than 30 degrees.

Second, moderate soil cultivation. After the leek buckle shed, it is generally almost ready to sprout in 25 days, until the seedlings grow to 6-7 cm high, and the first soil cultivation should be carried out, and the soil height is 3-4 cmWhen the seedlings grow to a height of 10-15 cm, the second soil cultivation is carried out, the height of the soil is 6-7 cm, and then the leek roots become mounds, and the rows become furrows.

Third, fertilizer and water management methods. Leek growth and development prescribe lower air humidity and higher soil moisture. The air humidity of the greenhouse is maintained at 60-70, and the absolute moisture content of the soil layer is maintained at 13-15.

Generally, the heavy clay soil layer will not be watered again if it is watered before the shed. In order to promote the growth and development of leeks in the next knife, you can water 1 small water 5 7 days before the harvest of the first knife, and 15 20 kg of ammonium nitrate will be melted with water per 667 square meters (mu), and then each leek should be watered and increased fertilizer 5 7 days before harvesting.

Fourth, harvest at the right time. When the leeks grow to 20-25 cm high, cut the first knife, and then the interval between each knife is 20-25 days, and the general arch shed is harvested 3-4 knives, and the output value per mu can be 3000 kg. Harvest time:

The initial harvesting period should be after 5 leaves, and the knife does not have to be too deep when harvesting, and the soil skin can be pasted, otherwise the rhizome injury will lead to dead seedlings and broken strips.

Fifth, pest control. The specific diseases of leeks in greenhouses include leek maggot and gray mold, and leek maggot can be irrigated with 50% phosphine 800 times or 90% crystal trichlorfon 1000 times; In the early stage of gray mold complication, 1000 times of 50% Suclin wettable powder was used, sprayed once every 7 days, and sprayed 2-3 times in a row, and the control effect was good.

Water and fertilizer management should be carried out, regular fertilization should be carried out, soil fertility should also be enhanced, pest control should be carried out frequently, and weeds should be pruned regularly. Prevent some leek diseases.

When you manage it, you must reach the temperature, which is about 18, and you also need to pay attention to the soil, and when it is about 15 cm, you need to do it for the second time, and you must water it more when planting, and you can harvest it in the later stage.

Leeks are a common vegetable that is grown everywhere and is usually grown in greenhouses in winter or in places with cooler temperatures. The greenhouse leeks should be kept at a suitable temperature after the shed is closed, and when the temperature in the shed exceeds 24, the wind should be released to reduce the humidity, and the insulation should be strengthened in winter. Usually keep enough light, and carry out appropriate topdressing during its vigorous growth period.

Irrigation is carried out about 10 days before each harvest, and air drainage is carried out after irrigation.

It is necessary to do a good job of ventilation, timely watering and fertilization, but also pay attention to the selection of high-quality seeds, pay attention to the density of planting, ensure the fertility of the soil, and prune branches and leaves in time during the planting process.

Be sure to ventilate in time, do a good job of drainage, don't let the soil get too wet, and prevent seedlings from rotting. It is necessary to choose the right leek variety for planting.

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Do you need to plant leeks in greenhouses: greenhouses can be planted, but pay attention to light 1, heat preservation After the shed is closed, you can control the planting temperature, generally 20-25 during the day and 5-10 at night.

When the plant height grows to more than 10 cm, keep it at 16-20 during the day, and the temperature in the shed should be more than 24 to reduce humidity. In winter, the cultivation of small arch sheds should be strengthened and kept above 6 at night. Later, as the external temperature drops, cover the straw and paper quilt at night, and cover it early and uncover it late to strengthen the thermal insulation performance.

Winter leek planting method 2, top dressing Leeks have strong fertilizer tolerance, high demand for nitrogen fertilizer, and the best organic fertilizer to apply human manure, chicken manure and kang soil. Ammonium sulfate and compound fertilizer are the most ideal fertilizers. It is generally recommended to fertilize 40-50 kg of ammonium sulfate per mu, and after soil cultivation, top dressing is required for organic fertilizer.

Leek greenhouse planting 3, irrigation leeks are suitable for growing in a 60% humidity environment, irrigation is generally carried out after buckling the shed and 10 days before each harvest, after irrigation needs to be ventilated and dehumidified. It is conducive to the normal growth of leeks. 4. Sufficient light is the factor of high yield and high quality of leeks, during the growth of leeks, when the sun shines in, the grass curtain should be opened in time, the dust of the shed should be swept away, and the straw curtain should be covered tightly when the sun leaves the shed in the afternoon.

In cloudy and snowy weather, the curtains should also be lifted as usual for lighting. 5. Pest control Leeks should prevent and control gray mold, and they can be smoked with Sukelin smoke after each watering to prevent and remove the disease residue in time. Peel off the diseased leaves at each harvest and bury them deeply.

If gray mold occurs, spray it with 50% Sukrin immediately. I hope this service can help you, you can click on my avatar to follow me, and if you have any questions in the future, you can consult me again, and look forward to serving you again. Wishing you well; Happy life, everything goes well [warm] [warm].