The sowing time and planting methods of lettuce in spring, summer and autumn!

I believe everyone is familiar with lettuce, fresh fleshy stems and green leaves are fried, hot pot, spicy hot pot common ingredients, but also widely planted. The following will be spring, summer, autumn lettuce sowing time and planting methods under the introduction, growers can collect it well!

1. Basic information of lettuce

1. Distribution of lettuce production area

Lettuce is a biennial herb, also known as green shoots, stem lettuce, etc., originating from the Mediterranean coast, distributed and planted all over China.

2. The value of lettuce

Lettuce is rich in protein, get rich, trace elements, etc., food has the function of opening and dredging, eliminating accumulation of qi, diuresis and lactation, strengthening the body, preventing cancer, relaxing bowels and so on. It is helpful to promote urination, reduce pressure on atrium and eliminate tension, and help sleep.

3. Variety of lettuce

lettuce can be divided into two types according to leaf shape: pointed leaf and round leaf, and the pattern color is divided into white shoots (green-white skin), green shoots (light green skin) and purple shoots (purple-green). Generally, the varieties suitable for planting in different regions are different, such as Hunan mainly with gong hammer lettuce, Nanjing for purple skin fragrance varieties, Hubei Xiaogan lettuce, Shaanxi round leaf white shoots, Shanghai small round leaves and large round leaves, Chongqing Wannian piles, Beijing purple leaf lettuce and so on, we choose different varieties according to the local planting environment and market for planting.

Second, spring, summer, autumn lettuce sowing time and planting methods complete

1. Sowing time and planting method of spring lettuce

(1) For general spring lettuce and lettuce that needs to winter, varieties with cold tolerance, strong adaptability and late bolting should be selected; greenhouse seedling should be carried out from December to March of the next year, and open field seedling should be carried out from mid-February to late March.

(2) It should be remembered that before spring lettuce seedlings emerge, cover them early in the evening, do not ventilate, and raise the bed temperature. After the seedlings emerge, proper ventilation is required to keep the bed temperature at 12-20℃ during the day and 5-8℃ at night. Sunshade net early open late cover, 2-3 true leaves time seedling 1 time, seedling spacing 4-5 cm. 5-6 days before transplanting, strengthen ventilation and seedling tempering.

(3) The planting of spring lettuce should be carried out about 25 days after seedling emergence, and then the soil should be watered and pressed, and then the cultivation, watering and fertilization should be carried out when the weather is fine.

2. Sowing time and planting method of summer lettuce

(1) Summer lettuce should be sown on cloudy days from April to May every year. After sowing, it should be covered with thin film and removed after emergence.

(2) From late May to early July, cover the sunshade net with small arch shed or flat shed until emergence or 2 true leaves. Cover with sunshade net to prevent rain washing on rainy days. Sow 5-10 grams in 10 square meters. Thinning seedlings once before 2 true leaves, seedling time once after 4-5 true leaves, seedling spacing 10 cm. Healthy seedlings can also be planted at a high density of about 10 cm in plant spacing.

(3) In addition, after thinning, fixing and transplanting of summer lettuce every time, decomposed and diluted excrement water is applied in combination with watering. In rainy days, ditch cleaning and drainage, irrigation of 0.50% urea water once about 15 days before planting. After 25 days or so, tender plants can be harvested and marketed.

3. The sowing time and planting method of autumn lettuce

(1) Autumn lettuce is generally sown from July to September every year. After sowing, it should be covered with straw, covered with sunshade net after emergence, and watered and fertilized in the morning and evening.

(2) Autumn lettuce should be planted about 25 days after emergence. The planting time should be selected in cloudy days or afternoon. After planting, it should also be watered to keep the soil moist and apply light fertilizer frequently.

4. With lettuce stem full hypertrophy can be harvested at any time before the tender plant market for sale, if you want to keep seed to winter spring lettuce seed is better.

The above is the introduction of all the contents of lettuce sowing and planting. In addition, attention should be paid to the invasion of downy mildew, gray mold, aphids and other diseases and insect pests in the planting process to ensure the yield and quality of timely prevention and control.