The planting method and time of leeks in greenhouses

Leeks can be grown all year round. Before planting, the land is prepared, then sown at the right time, watered in time after the emergence of seedlings, and urea is applied.

Promote growth, top dressing according to growth, and pay attention to the prevention of weeds in the field.

1.Heat preservation. After the shed is closed, the planting temperature can be controlled, generally 20 during the day and 10 -5 at night.

When the plant height is greater than 10 cm, the temperature in the shed should be lowered by air, and the daytime temperature should be kept at about 16 and 20. The winter cultivation of small arch sheds should strengthen heat preservation and keep more than 6 at night. In the future, as the outside temperature decreases, cover the grass and paper quilts at night, cover the early and late openings, and enhance the thermal insulation performance.

2.Topdressing. Leeks are highly tolerant to fertilizer and have a high demand for nitrogen fertilizer. The optimal amount of organic fertilizer is human manure, chicken manure and kang soil. Ammonium sulphate.

and compound fertilizers are the most ideal fertilizers. It is generally recommended to apply 40 kg of ammonium sulfate per mu. After soil cultivation, organic fertilizer needs to be applied at one time.

3.Irrigate. Leeks are suitable for growing in an environment with 60% humidity. Irrigation usually takes place behind the shed, 10 days before each harvest. It is beneficial for the normal growth of leeks.

4.Illumination. Sufficient light is the factor for the high yield and quality of leeks. During the growth of leeks, when the sunlight shines in, the grass curtain should be opened in time to clean up the dust on the shed. In the afternoon, when the sun leaves the shed, the grass curtain should be strictly covered. Cloudy.

and heavy snow should also be exposed as usual.

5.Pest control.

Leeks should be prevented from botrytis cinerea, and they can be watered with Suikelin fumigation shed each time to prevent timely removal of disease and disability. At each harvest, the diseased leaves are peeled off and buried deeply. If gray mold develops, it is immediately controlled with 50% clonazepam spray.

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 be fertilized 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 when moss is pumped, 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.

Shed BAI production stage management.

Buckle shed: open the first buckle shed in November, shovel off the old leaves before the buckle shed, fertilize zhuan, open a 5cm deep ditch in the empty row when fertilizing, apply 50kg of diammonium per 667 square meters, 1000kg of rotted chicken manure, 50kg of urea, and then cover the soil, water once, and then scatter the shed after the deduction shed, generally leek shed to buckle three (three layers of coverage).

Soil cultivation: soil cultivation is an important part of leek cultivation, when the leek grows to 10cm, the soil can be cultivated once, which can make the leek stem thicker and longer, and improve its commercial characteristics. Each stubble of leeks is cultivated 3 times, and the specific soil cultivation time depends on the growth of leeks.

Harvesting: Leeks are generally harvested 2 3 stubble. When harvesting, harvest from the base with a shovel, it is better not to hurt the roots, and it is advisable to make the cut yellow, and the wound should be neat and consistent.

After each harvest, the soil on the stubble is raked finely, the surrounding soil is hoeed and loosened, and after 2 3 days, the leek wound heals, and when the new leaves are about to grow, watering and top dressing, 400kg of organic fertilizer, 30kg of urea, and 10kg of compound fertilizer are applied per 667 square meters.

Leeks in greenhouses should be raised in April and May. Then the land in the greenhouse is sorted out and transplanted when the leek seedlings grow to four or five inches tall. Such leeks grow stout, have a high yield, good quality, and can be sold for more money.

The time and method of leek planting are:

Leeks can be grown in spring, summer, and autumn, but the best time to plant them is between March and May, when the temperature is stable between 15 and 18 degrees Celsius, which is conducive to germination and easy to manage. Nowadays, greenhouse technology has been very common, and the technology is also mature, and it is planted in all seasons.

Second, leek planting methods:

1. Soaking seeds to promote germination:

When sowing, it is necessary to promote germination first. Put the seeds in the light to dry for a day or two, and then soak them in warm water, control the water temperature, maintain it at about 30 degrees, soak for 8 to 10 hours, and wait for the radicle inside to stretch out before sowing.

2. Reasonable sowing:

The method of sowing leeks is very simple, just sprinkle the seeds directly on the soil surface. After sowing, it should be covered with a layer of soil, watered thoroughly, and then covered with plastic film, which can play a good role in heat preservation and moisturizing, as long as the temperature in the later stage is suitable, it will grow seedlings in about a week, and the plastic film will be lifted after the seedlings emerge.

3. Post-maintenance:

If you want to grow leeks better, you should strengthen management in the later stage. When new leaves grow, hydrate and moisturize in time. Fertilizer should be supplemented once a month at intervals, and nitrogen fertilizer can be used.

It is best to dilute and water the fertilizer solution, so that it is absorbed faster. In addition, it is necessary to remove weeds from the plot in a timely manner.

Greenhouse leeks are generally sown at any time after the winter and after the soil thaws to the autumn equinox, generally from late March to early May.

What are the cultivation techniques of leeks in greenhouses?

1.Breed selection.

Select high-quality and high-yielding varieties with strong adaptability and tillering ability, wide and thick erect leaves, short dormancy period, and early germination. And it has to be local.

2.Seedling management.

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 ditch is 2 cm deep, the sowing width is 5 cm, and the amount of seed per mu is usedSeedling 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 out and rinse with water 2-3 times, and then wrap it with a clean damp cloth and put it at a temperature of 25 degrees to promote germination, 2-3 days later, when 30% of the seeds are white, you can sow seeds.

In the seedling stage of leeks, it is necessary to pay attention to the management of weeding, fertilizer and water to ensure their normal growth.

3.Colonization. The seedlings are 70-80 days old in spring, and can be planted when the seedlings are 1820 cm tall and have 5-6 leaves.

Before planting, 5000kg of mature organic fertilizer and 50kg of compound fertilizer were applied per mu. Deep ploughing and fine fertilizer, land preparation for furrowing, furrow width 2 meters, furrow width 50 cm, length 30 meters (greenhouse span meters, length 30 meters, two furrows and one shed).

4.Field management.

After planting, water enough to stabilize the roots, water once every 4-5 days in the early stage, promote the cultivation of soil 2-3 times after each watering, and strengthen drainage in the rainy season. After autumn, fertilizer and water management should be strengthened, generally watering once every 5-7 days, and chasing fertilizer once every half month, 2-3 times in a row. 15kg of urea per mu or 5kg of water-soluble fertilizer per mu, stop topdressing and watering by late September.

In mid and late November, after the outer leaves of the leeks are fully withered, the shed is covered with film. Cut the leeks before buckle the shed, clean the furrow, water and fertilize. After 3-4 days of drying, choose a windless and sunny day buckle shed.

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 planting is mostly in July and August, when the temperature is high, planting leeks requires preparing seedbeds, treating seeds, and controlling the amount of sowing.

1. Planting time.

Leeks can be grown from July to August every summer. At this time, the temperature is higher, which is more suitable for the germination and growth of leek seeds. Before sowing, it is also necessary to observe the changes in the weather, and choose sunny or cloudy weather for sowing, rather than rainy weather.

2. Planting method.

1. Seedbed preparation. Choose loose and fertile, convenient drainage and irrigation, 3 years have not been planted onion and garlic plots, after the previous stubble harvest, apply 500 kg of rotting organic fertilizer per mu, 50-60 kg of ternary compound fertilizer, plough and rake finely, and make a wide rice, 8-10 meters long flat furrow.

2. Seed treatment. In order to promote post-ripening and improve germination rate, the seeds are dried for 2-3 days before sowing. Soak the seeds in 40 warm water for 24 hours after drying, remove them, wash and drain them, wrap them in a damp cloth and put them in the environment for 20-25 years to germinate, about 3 days, 80% of the seeds can be sown when they are white.

3. Control the sowing amount. The suitable density of seedlings per square meter is 1600 plants, about 10 grams of seeds, calculated according to 80% of the actual sowing area, and about 5 kg per mu needs to be sown. Seedlings can be planted twice as long as the seedbed.

4. Before sowing, pour the bottom water, sprinkle a thin layer of fine soil after water infiltration, so as not to stain the seeds with mud and affect respiration, and then evenly sprinkle the seeds into the seedbed, cover the fine soil centimeters after sowing, and then cover the fine soil 1 cm after sowing, so that the upper and lower layers of the soil capillary are not connected, and keep the topsoil loose and moist, which is conducive to the emergence of seedlings.

5. Seedbed management. After the emergence of seedlings, keep the soil moist, when the seedlings are 4-6 cm high, water in time, and then water every 5-6 days, when the seedlings are 10 cm high, 10 kg of urea per mu with water. When the seedling height is 15-20 cm, 10 kg of urea should be applied again, that is, the seedling should be squatted to promote the coordinated growth of the aboveground and underground.

Pay attention to the prevention and control of diseases, insects and weeds.

Leek is a perennial vegetable, which is not particularly demanding for the environment, and has a particularly strong adaptability, whether it is cold or hot, it can grow effectively.

Therefore, it can be planted in many parts of our country, and even in the relatively warm areas of the south, it can be produced all year round, while in the northern region, in winter, the aboveground part may die, and the underground part will enter dormancy, and it will germinate and grow again after the weather warms up in spring.

After the leek planting, it is necessary to strengthen the field management operation, such as timely watering, and maintain the cultivation operation, to ensure that the soil is dry and wet, and when the leek grows more vigorously, it must be supplemented with fertilizer and water in time, so as to improve the growth ability of the leek, enhance its stress resistance, and ensure the yield and quality.

When to plant leeks in greenhouses, and when to plant leek seeds in greenhouses.

The leek planting time is to sow at any time after the soil thaws after digging the winter to the autumn equinox, generally from late March to early May. 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.

1. Appropriate seedlings.

The growth of leek seedlings is slow, so it should be sown early, and it is advisable to sow from late March to late April. After soaking and germination, the wet sowing method is used to sow in the seedling furrow, and the soil is covered twice, the first time is covered with a thin layer of soil, and then the second time after the moisture is returned, the total thickness of the covering soil is 2 cm, and the amount of seed per mu is 6 8 kg. After covering the soil, cover the mulch film to facilitate temperature and moisture preservation, and remove the mulch film after the emergence of seedlings.

Generally, 1 acre of seedlings can be planted with 7 9 acres of vegetable fields.

2. Seedling management.

The height of the leek seedlings is about 5 cm, and the soil is lightly watered to loosen the soil in time. After 10 cm, it can be combined with watering to apply decomposed manure or topdressing urea 2 3 times, and apply crystal trichlorfon per mu with water to kill leeks and maggots and other pests. After the seedlings are 15 cm high, the irrigation is controlled to prevent the growth from lodging.

Weeds should be uprooted in time, and the seedlings should be controlled with kilogram 25% herbicide ether per mu when the seedling height is about 12 cm, or the surface should be treated with kilogram 33% weeding emulsifiable concentrate spray per mu before sowing and seedling.

3. Reasonable colonization.

Leek planting selection of fertile soil drainage and irrigation convenient plots, mu of decaying farmhouse fertilizer 4 5 cubic meters, leveling furrow. The width of the furrow is 2 3 meters, every group of 3 furrows, and a 1 meter wide cold zone is set on its north side. Transplanting from late June to early July, cutting off the ends of fibrous roots before planting, and arranging the bulbs into small handfuls.

Flat furrow hole planting, row spacing 13 20 cm, hole spacing 10 15 cm, each hole 6 8 plants is appropriate. When planting, it is advisable not to bury the leaf sheath, and after planting, it is practical and watered in time.

4. Field management.

After the new leaves of leeks are issued, the seedlings should be watered slowly, and cultivated to protect moisture, so as to keep the soil dry and wet. After autumn, it is the most vigorous period of leek growth, and it is necessary to fully fertilize and water. After that, the temperature gradually decreases, the plant grows slowly, and the surface can be kept dry.

Leeks require moderate light intensity and strong resistance to negatives. However, if the light is too weak, the accumulation of photosynthetic products is less, the tillers are less and weak, the yield is low, and it is easy to premature aging. The light is too strong, the temperature is too high, there are many fibers, and the quality is poor.

5. Harvest at the right time.

The yield of leeks was low in the first 1 2 years after planting, and the yield was the highest in 3 6 years, and it entered the senescence stage after 10 years, so it should be transplanted in time. The number of harvests per year, depending on the growth of leeks, fertilization and the market**, with 7 leaves and 1 heart as the standard for cutting leeks, the best harvest in the morning, to cut to the bulb 3 4 cm yellow leaf sheath is appropriate, and each knife should be slightly higher than the previous stubble in the future, in order to ensure normal growth.