Lettuce planting time and method can ripen in a few hours

Planting time. Lettuce has strong adaptability, semi-cold tolerance, likes cold and cool environment, and is afraid of high temperatures, so it can be planted in spring and autumn, and its planting time should be selected according to the local climate and temperature environment. Spring lettuce is planted in the open field from April to May, and autumn lettuce is planted in 9-10, which can safely overwinter in the Yangtze River basin.

Cultivation method: 1. Soil preparation and fertilization.

The root system of lettuce is shallow and the absorption capacity is weak, so the soil should choose loose sandy soil is better, choose a high-terrain, well-drained, dry plot, apply foot fertilizer before sowing, and then turn deeply, knock the soil loose and crush, and then level it finely, cover it with a layer of mulch and prepare for planting.

2. Sow seeds. In order to ensure that the seeds can germinate smoothly, the seeds need to be treated before sowing, and the seeds should be soaked in water for about 6 hours, and then wrapped in a wet towel to start germination. After germination, you can sow seeds, lettuce seeds are relatively small, so when sowing, the environmental fine soil is stirred evenly and then sown, before sowing, the soil is watered once, an average of 2-3 grams per square meter of sowing, and a layer of shallow fine soil can be covered after sowing.

After sowing, cover a layer of film, heat preservation and moisturizing to speed up germination, carefully observe, when the seedlings are unearthed, immediately open the film, maintain ventilation and light, and wait for the seedlings to grow about 3 true leaves when they can be planted.

3. Colonization management.

In order to ensure its rapid and strong growth, the spacing and row spacing should be kept 25cm 30cm, watered in time to promote root development, keep the soil moist, if the planting is a high temperature period in summer, it should be properly shaded to avoid damage to the seedlings. There is basically no need to fertilize after applying foot fertilizer, you can apply one or two farm light fertilizer when you apply it in combination with cultivating or weeding, and pay attention to the shallow roots when cultivating, its root system is not underdeveloped, and the cultivator is too deep, which will damage its root system.

Under normal circumstances, the planting time of spring lettuce is: in December and March in the greenhouse, in mid-February and late March in the open field. The planting time of summer lettuce is:

It is cultivated in the open field from April to early to mid-May, and covered with shade nets in late May and July, and planted at a high level or at high density. The planting time of autumn lettuce is: in July to September, the seedlings are transplanted by covering the sowing with shade nets.

Overwintering lettuce, seedlings raised in the open field in October and November.

Lettuce is one of the main vegetables commonly cultivated in Shaanxi, and the main market time for traditional cultivation is spring and autumn, that is, March May, October and November, and there is no lettuce in summer and autumn.

Lettuce prefers a cool climate, and the growing season of lettuce in summer and autumn coincides with the high temperature season. High temperature and long sunshine are easy to cause early lettuce extraction, resulting in lettuce slenderness, poor quality and low yield, which is one of the main factors restricting the development of lettuce in summer and autumn. Therefore, first of all, it is necessary to choose varieties that have strong heat resistance, are not sensitive to sunlight reaction, and are not easy to moss pumping.

<> lettuce generally takes about 3 months from planting to maturity. Germination period: It takes about 8-10 days from sowing to the appearance of true leaves.

Seedling stage: from the true leaf to the first leaf sequence, it takes about 17-27 days for live broadcasting, and the whole period is generally more than 30 days. Romatic period:

The "cluster" to the third leaf sequence is complete, the heart leaf is flush with the outer leaf, and it generally takes 20-30 days. Succulent stem formation stage: the stem expands rapidly, and the leaf area expands rapidly, which takes about 30 days.

Lettuce is generally planted in spring and autumn, but in some places with mild seasons, it can also be planted in four clear seasons, lettuce sowing time is different, harvest time is also different, spring sowing in June-August, summer sowing in September-October, autumn sowing from mid-November to February of the following year, winter sowing in the second year of March to May harvest.

Lettuce planting time.

Lettuce is generally planted in spring and autumn, but in some mild areas, it can also be planted in all seasons, sowing in March to May in spring, sowing in June and July in summer, sowing in autumn generally lasts from mid-August to October, and winter sowing from early November to January of the following year.

Lettuce harvest time.

Lettuce is harvested from June to August in the spring, September to October in the summer, from mid-November to February of the following year for the autumn sower, and from early March to May of the following year for the winter sower.

Lettuce high-yield planting points.

1. Seed treatment

Lettuce is a cold-tolerant vegetable, not resistant to high temperatures, if sown in hot weather, it needs to be germinated, first soaked in diluted nutrient solution for 6-7 hours, taken out and put in wet gauze, and then stored at low temperature, the temperature is kept at minus 3-5, frozen for 24 hours and moved to a cool place, waiting for 2-3 days to sprout.

2. Soil preparation and fertilization

The root system of lettuce is relatively weak, the soil is loose and has a strong ability to retain water and fertilizer, in order to improve fertility, it is necessary to apply sufficient base fertilizer, usually tons of well-rotted organic fertilizer per mu, and then it is necessary to carry out deep turning, level the soil and cover the film.

3. Sowing seedlings

After stirring the seeds of lettuce and fine soil, the film is uncovered and sprinkled into the seedling field, and then covered with soil and covered with film, if it is sown in spring or summer, it is also necessary to shade it with a shade net or a small arch shed, and when it emerges, it is necessary to ventilate, and when the seedlings grow 4-5 true leaves, seedlings need to be thinned.

Summary. 1. Planting time.

The planting time of lettuce varies in different regions and varieties, and generally the Changjiang River basin is planted in the open field, mainly spring lettuce, which is sown in September and October in autumn. In other areas, spring lettuce is generally raised in a small shed from December to March, and transplanted in February and March. The summer lettuce seedling time is from April to May, and the autumn lettuce seedling time is from July to September.

2. Soil preparation and fertilization

Lettuce root system shallow, drought tolerance is weak, planting * soil to choose * loose, water and fertilizer retention, in addition to planting before the fertilization work to do a good job of soil fertilization, first apply rotten organic fertilizer, and then * soil rake fine, leveling, make a furrow distance of 120 cm, width of 80-100 cm of high furrow. 7-8 days before planting, the gutter irrigation is permeable, 3-4 days after covering the mulch, it needs to be tightened and paved, so that the film and the ground are tightly compressed, and the surrounding area is pressed tightly.

What is the time and method of growing lettuce?

1. Planting time lettuce is different in different regions and varieties of planting time, generally the Changjiang River basin is planted in the open field, mainly spring lettuce, and sown in September and October in autumn. In other areas, spring lettuce is generally raised in a small shed from December to March, and transplanted in February and March. The summer lettuce seedling time is from April to May, and the autumn lettuce seedling time is from July to September.

2, land preparation and fertilization lettuce root system shallow, drought tolerance is weak, planting * soil to choose * loose, water and fertilizer retention, in addition to planting before the fertilization of the land to do a good job of fertilization, first apply rotting organic fertilizer, and then * soil rake fine, leveling, made into a furrow distance of 120 cm, width of 80-100 cm high furrow. 7-8 days before planting, the gutter irrigation is permeable, 3-4 days after covering the mulch, it needs to be tightened and paved, so that the film and the ground are tightly compressed, and the surrounding area is pressed tightly.

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Spring lettuce, greenhouse seedlings from December to March, and open field seedlings from mid-February to late March; Summer lettuce is cultivated in the open field from April to mid-May, covered with shade nets from late May to July, and planted with direct seeding or high density; Autumn lettuce, from July to September, use shade net to cover and sow seeds, and seedlings are transplanted; Overwintering lettuce, seedlings in the open field from October to November.

Lettuce in the Yangtze River basin winters in the open field, mainly spring lettuce, generally sown in September to October in the autumn of the first year, 40-50 days when the seedlings have 5-6 true leaves planting, can safely overwinter in winter, there is enough time to grow leaf clusters after returning to green in the next spring, and high yield can be obtained by harvesting in April and May.

The cultivation of lettuce is in the environment.

1. Light: Lettuce is a long-day crop with sufficient light.

2. Temperature: Lettuce is a semi-cold-tolerant vegetable, likes cold and cool, slightly resistant to frost and frost, afraid of high temperatures, and grows poorly in the hot season.

3. Soil: Lettuce is sensitive to the acidity and alkalinity of the soil, and is suitable for planting in slightly acidic soil, and the suitable soil pH value is about one.

4. Moisture: It is extremely sensitive to the water state of the soil surface, and it is necessary to continuously supply water to keep the soil moist. And the amount of fertilizer required is large, and it is suitable to grow in clayey loam or loam soil that is rich in organic matter and retains water and fertilizer.

Pest and disease control of lettuce.

Lettuce diseases and insect pests mainly include downy mildew, sclerotinia sclerotinia disease, virus disease, gray mold, aphids, leaf miners, etc., in order to prevent it, in order to meet the suitable temperature for the growth of lettuce (no more than 24 degrees during the day, not less than 10 degrees at night) to increase ventilation as much as possible, in the case of high humidity, timely ventilation and moisture dissipation can prevent the occurrence of diseases, once the disease occurs, according to the condition of timely medication, in order to prevent the spread of the disease.

1. Downy mildew: 2000 2500 times liquid spray, Anker 2500 times liquid spray.

2. Sclerotinia sclerotinia disease: Suclin 1000 times liquid spray, Nonrilin 1000 times liquid spray.

3. Viral disease: virus A 500 times liquid spray, bacterial gram 1000 times liquid spray.

4. Botrytis cinerea: 800 times liquid spray of Shijiale, 600 800 times liquid spray of Pythium.

5. Aphids: 50 imidacloprid EC 3500 4000 times.

6. Leaf miners: adults can use avermectin emulsifiable concentrate 4000 5000 times; The larvae sleepy beamworm was controlled with 75 grams (fly amine) wettable powder 4500 5000 times.

Lettuce planting time and method are as follows:

1. Planting time.

The planting time of lettuce should be determined according to the climate and environment of various places, it likes to grow in a cold environment, it can generally be planted in February and March in spring, and can also be planted in September in autumn, it is generally not recommended to plant in summer, because the summer temperature is high, it is difficult to germinate and grow.

2. Soil preparation and fertilization

Lettuce is most suitable for planting in loose, fertile and well-drained sandy loam soil, after selecting the plot, you need to use the appropriate amount of fertilizer in the soil as the base fertilizer, and then the land should be deeply turned to make the soil loose and fertile, and finally leveled and fine can be ready for planting.

3. Sowing seedlings

Mix the seeds of lettuce and fine sand evenly, and then sow them into the seedbed, you need to water enough water before sowing, the soil is in a slightly moist state, cover with a thin layer of soil and then cover with a layer of mulch, which can play a role in heat preservation and moisturizing, and soon it can germinate and grow.

4. Planting and maintenance.

Lettuce seeds should be removed in time after the seedlings emerge, it has 2-3 true leaves when the seedlings should be interspersed once, and then increase ventilation and seedlings, and when the lettuce grows 5-6 true leaves, it can be planted into the soil according to the plant spacing of 20 cm 27 cm, pay attention to the root water to be watered once after planting.