How to control the temperature of leek planting? How to manage leeks in autumn?

The temperature of leek planting is controlled at about 25 degrees. However, the temperature required for each stage is different, and it is best to control the temperature above 12 degrees Celsius when the seeds germinate. Autumn leek management is mainly.

Fertilize once every half a month, choose organic fertilizer for fertilizer, and water appropriately to keep the soil moist.

The rainfall decreases after the summer festival to before the cold dew, the weather is getting cooler, the maximum temperature rarely exceeds 30, and the minimum temperature rarely falls below 10, which is the most suitable growing season for leeks and the key period for fertilizer and water management. After entering the autumn in September, the weather gradually becomes cooler, and the leeks have entered the vigorous growth period, so it is necessary to strengthen the management of fertilizer and water and prevent the harm of leek maggots.

Leeks prefer a cold environment, and the suitable temperature for growth is 15 -24

In mid to late September, combined with the cultivation of 20 kg of urea per mu or 50 kg of ammonium bicarbonate, ammonium bicarbonate can be washed with water, and watered once every 2 3 days after top dressing, and watered twice in a row.

Leeks can be grown all year round, and there are two ways to grow leeks, sexual reproduction and genetic variation. Sexual reproduction is actually to sprinkle the seeds in rows in the field to pre-seedling. However, this kind of planting method is not well advocated, the seeds of leeks are too fine, and the rhizomes of leeks are relatively developed and the reproduction rate is stronger, so in the case of seed seedlings, if the planting is too concentrated.

The leek seedlings before germination are thin and weak. Leeks only need to be planted for one year, and they can be harvested in the next 4-5 years, that is, because of these characteristics of leeks, they are commonly planted by the villagers.

Leeks have the characteristics of jumping roots, therefore, the soil cultivation work can not be ignored, should be melted and bleft Xinhe compound fertilizer to carry out a large soil cultivation to promote growth, usually can have the opportunity to carry out small soil, soil cultivation should be carried out on sunny days, with the road surface has eroded subsoil cultivated at the roots of the plant. During the growth period of leeks, the climate is soft and precipitation is too much, and weeds are easy to produce, so it is necessary to hoe and hoe the soil and loosen the subsoil, and raise the soil temperature, so as to facilitate the leeks to raise their roots and grow trees, and often cut off the yellowish and dead branches to reduce the occurrence of diseases.

Leeks are not the same growth period for the temperature regulations, the germination period is the seed germination to the seedling extension and emerge the first leaf, the minimum temperature of seed germination is 2 3, the suitable temperature is 15 18, the number of germination days is determined by the soil temperature, generally about 10 20 days; The seedling stage is the time constant of the first leaf outstretching, about 40 60 days, and the growth temperature is 12 24 , and the growth above 25 is not good. The suitable temperature for the growth of leaves and stems is 12 24 in broad daylight, and the temperature regulation is relatively high during the flowering period of sprouting, generally 20 26.

Leek varieties are different, low temperature resistance is also different, leeks native to the southern region, like warm climatic conditions, low temperature resistance is weak, varieties produced in the northern region, low temperature resistance is very strong. There are many varieties from the southern region that cannot be cultivated in the open field for the winter in the northern region, so attention should be paid to the selection of varieties. Under the premise of open field cultivation, or in the spring plastic arch shed where the temperature is low and the temperature is low, the temperature is within 35 in the afternoon during the daytime, and the temperature drops to 2 at night, the plant can still grow normally.

However, when planting in the greenhouse for winter, it will produce chilling injury, mainly because of the weak sunlight in the greenhouse, high humidity, delicate leaf mechanism, and low cold resistance.

When planting leeks, it is necessary to disinfect the soil in advance, and to ensure that the soil is clean and tidy, the acid-alkali locust of the soil can be sown. When planting lead and planting leeks, the temperature should be controlled at least above 12 and kept at about 15 18.

It is necessary to grasp the timing of planting. Keep the temperature at around 20 degrees and water in time to ensure the moisture of the soil.

Choose the right land for planting, pay attention to watering, pay attention to fertilization, pay attention to light, and generally it is best to keep it at about 20 is the most suitable.

To choose the right variety for planting, we must pay attention to the density of planting when planting, we need to pay attention to watering, we need to pay attention to the temperature of the acre, and the thermometer is 15 left and orange right.

The temperature begins to cool down in autumn, how to manage growing leeks in autumn? Autumn temperatures are getting cooler, which is conducive to the growth of leeks. Generally speaking, within 10 days after entering the beginning of the autumn solar term, you can start to apply tung carry section fertilizer.

Growers apply 10-15 kg of 15% nitrogen, phosphorus and potassium compound fertilizer per mu, and apply about 150-200 kg of grass ash, with an interval of about 10-15 days each time. After each top dressing, it should be watered in time, but the amount of watering should be small, and the cultivation should be carried out in time after watering, so as to increase the air permeability of the soil and promote the growth and development of leek roots.

Generally speaking, the southern region will be cloudy and rainy in autumn, and Yinqing needs to do a good job of ditch cleaning and drainage in the field to avoid the problem of water accumulation in the field and waterlogging. Do not flood with water every time you water, so as not to cause the growth of leek seedlings, which is easy to cause the problem of delayed nutrient reflux, affect the nutrient accumulation of the root system, and is not conducive to overwintering.

There are two common types of infection and damage in the field: one is the formation of white or light-colored chestnuts at the tip of garlic leaves, and gradually develops downward, and the later stage of the disease spots melts and forms large dead spots, resulting in the drying of some leaves, and the dense formation of gray villous layer on the surface of dead leaves when wet; Watering must be carried out during the day and when the temperature is right. When the weather gets cold, keep warm and avoid the cold in time, expose the shed later, cover it as soon as possible, and place grass blades or cotton pads in the shed, when the leeks grow to about 10 cm, it is best to tille the soil and fill the rows with straw to keep it warm and cold.

The most common solution is to plant soil and fertilizer at the right time. In this way, the roots exposed to the soil can be buried, which is equivalent to increasing the penetration depth of the root system and satisfying the root system's need to absorb basic nutrients. In autumn, leek management should pay attention to preventing drainage and irrigation, removing weeds in the field, and applying chemical fertilizers and water in stages to promote the growth of leek plants.

In autumn, due to the decrease in temperature, it is conducive to the growth of leeks, and heavy fertilizer should be applied before garlic grows vigorously, and the appropriate film period is before the local temperature is lower than 0 degrees. Currently, vegetables grow quickly and need a lot of nutrients, so they only need to be coated.

Leek is a cold-tolerant vegetable, with a wide range of temperature adaptation, and can be stopped for overwintering and summer cultivation in various parts of China, and is a perennial root-based vegetable.

Leeks are cold and heat tolerant, and the suitable temperature range for growth is 13 22, when the temperature exceeds 23, the nutrient accumulation of plants decreases, the cellulose content of leaves increases, the yield decreases, and the quality decreases. Especially under the conditions of high temperature, strong light and drought, the texture is coarse and hard, and the value of the commodity is poor.

The germination period is from seed germination to young sprouts stretching out and growing the first true leaves, the minimum temperature of seed germination is 2 3, the suitable temperature is 15 18, and the number of germination days is determined by ground temperature, usually about 10 20 days; The seedling stage is the first true leaf stretching out to a fixed value, about 40 60 days, the growth temperature is 12 24, and the growth is poor above 25; The optimal temperature for stem and leaf growth is 12 24 in the day, and the temperature requirement is higher in the flowering period of sprouts, which is 20 26 in general. In the cultivation of the maintenance area, due to the high humidity and weak light in the maintenance area, the temperature is slightly higher, and the quality of leeks will not be reduced. Ordinary daytime does not exceed 23, and each knife can be improved by 3 5 compared with the previous knife in the future, and the highest does not exceed 30; Suitable for night temperature 7 8, day and night temperature difference about 10, the temperature difference is too large, leeks are easy to foliar condensation, causing disease attacks.

Different types of leeks have different cold tolerance, the varieties native to the south like warm climatic conditions, poor cold resistance, and the species produced in the north have strong cold resistance. There are many southern species that do not overwinter in the open in the north, so special attention should be paid to the selection of species.

Under the conditions of open field, or in the spring plastic arch shed with low temperature conditions, the temperature is about 35 at noon during the day, and the temperature drops to 2 at night, and the plants can still grow normally. However, when overwintering cultivation in the greenhouse, frost damage will occur, which is due to the weak light and humidity in the greenhouse, the delicate leaf tissue, and the low cold resistance.

During the growth period of leeks, the climate is mild and rainy, and weeds are easy to attack, so it is necessary to cultivate and weed, hoe loose topsoil, and improve soil temperature, so as to facilitate leeks to raise roots and grow trees, and often remove yellow leaves and dead leaves to reduce the onset of pests and diseases.

Be sure to choose fertile and well-drained soil, be sure to choose a warm and humid environment and climate when planting, the temperature should be controlled at about 18 degrees to 20 degrees, the planting process must pay attention to the density, but also pay attention to the depth of planting, to do a good job of watering and fertilization, to choose more full and healthy seeds.

To choose sandy soil, you should choose some farmhouse fertilizer before planting leeks, you should choose a sunny place, and you can spread a layer of plastic film after planting leeks, so that they can grow quickly. The temperature is generally around 25 degrees.

Leeks can be planted in moist soil. It is best to keep it around 15 18 so that you can ensure the healthy growth of leeks.

If farmers grow leeks, they must pay attention to proper field management in summer to ensure adequate fertilizer. Chicken manure or sheep manure can be used as the main fertilizer for the land.

The high temperature and rainy temperature in summer lead to less nutrient accumulation and high consumption of leeks, and the increase of leaf tissue fibers. At this time, it is generally no longer harvested, and plant cultivation should be strengthened to lay a good foundation for a bumper yield of leeks in autumn.

You can sprinkle some plant ash in the summer, and you can also disinfect and sterilize the soil, so that it can be better managed. to be able to make leeks grow better.

Hello, if you plant leeks in early spring, the temperature is still low, so you should do a good job in cultivating loose soil, water and fertilizer management, and pest and disease management, and then I will introduce it in detail.

1. Apply plantar fertilizer.

Leeks are not the same as other crops, they can grow for 5-6 years after planting, so they can not be like other crops before planting with foot fertilizer, in the spring of each year, you can choose long-lasting and long-lasting soybean cakes, sesame cakes, etc., and then add fully rotted agricultural fertilizer, evenly sprinkle the mixed bottom fertilizer in the ditch that has been opened in advance, and sprinkle the bottom fertilizer into the ditch, and the ditch is about 15 cm deep.

2. Cultivating loose soil.

After the annual leek is green, it is necessary to carry out cultivating and loosening the soil, preventing and controlling soil compaction, you can choose to improve the soil with Haihewei microbial agent, clean up the weeds on the ground, cooperate with the cultivated loose soil, and flatten the furrow surface, so that the base of the leek plant can better receive sunlight, which can not only improve the ground temperature, but also promote the rapid regreening of the leek plant and prevent the growth of weeds.

3. Remove roots and soil.

For leeks that are more than three years old, the management of root and soil cultivation should be carried out after the beginning of spring, the purpose is to remove the dead and weak tillers, and retain the healthy growth of leek tillers, and the soil cultivation is carried out before the germination of new roots of leeks, and the position of the bulb disc is slowly moving to the landmark after the leeks are harvested, so the leeks should be soiled in the spring of each year and after each harvest.

Fourth, pest control.

Every spring is the most serious period of leek field qu, so in April must do a good job of prevention and control, you can spray deltamethrin EC 2000 times per mu for spraying, or use 2% methylavermectin EC 500 ml diluted into 1000 times of liquid for root irrigation, which is very effective.

In general, spring, like autumn, is the most vigorous season for leeks to grow, so it is necessary to do a good job of spring management so that leeks can grow better.

Temperature management. Leeks like to be cold, the suitable temperature for growth is 15 to 24 degrees, and it should be properly ventilated during the day. In order to promote budding, the daytime room temperature should be maintained at 18 25 degrees after the shed, and the daytime room temperature should be controlled at 17 23 degrees after germination.

Before the first leek is harvested, the temperature is 15 to 22 degrees during the day and 10 to 12 degrees at night. In the future, the temperature of each cutting knife can be increased by 2 to 3 degrees, but it should not exceed 30 degrees.

Fertilizer and water management. Leeks require lower air humidity and higher soil moisture in early leeks. The humidity of the greenhouse air is maintained at 60-70 and the absolute moisture content of the soil is maintained at 13-15.

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

Foliar fertilization. During the growth period, potassium dihydrogen phosphate was sprayed once every 7 days, and the concentration was 300 times the liquid; Gibberellin can also be used, with a concentration of about 40,000 times. When it grows to 15 cm, spray it with 1 gram per 667 square meters, add 50 kg of water, and then add ammonium nitrate for better results.

Harvest. The harvest period is generally before New Year's Day or the Spring Festival, and it is more appropriate to cut yellow edges, and the interval between two leeks is about 35 days. The harvest interval of leeks in early spring greenhouse is generally 30-40 days, which is about 30-40 cm high, and the content of various nutrients in the body is also relatively high, and the quality and yield of leeks are relatively good.

If harvested too early, the plant height and nutrient accumulation will be sown, the yield will be low, and the flavor will be weak; However, if the harvest is too late, the plant is very prone to lodging, the old leaves are easy to yellow, the risk of infection will increase, and the taste of leeks will gradually decline. When harvesting, you should choose a sharp and clean sickle, choose to do it in the morning or evening on a sunny day, and it is better to harvest in the morning after the shed is wet. It is not suitable for harvesting in low temperature and low sunshine days, because at this time the shed is often low temperature and high humidity, and the leeks grow slowly and grow weakly after harvesting.

Stubble height refers to the distance between the harvesting position and the upper end of the leek bulb, and the stubble height should be moderate, neither too high nor too low, with 3-4 cm being the most ideal. Judging from the color of the knife edge, it is appropriate for the cross-section to be light yellow, if the color is green, it means that the stubble is too high, and if it is white, it means that the stubble is too low. If the stubble of leeks is too high, it will affect the yield and quality of the stubble. If the stubble is too low, it is easy to damage the basal fascination of the leaf sheath, and it will also affect the harvest time and yield of the next stubble.