Lettuce when to grow lettuce is a vegetable in which season

Lettuce we often eat home-cooked dishes, whether stir-fried lettuce or lettuce slices, lettuce leaves are very delicious and nutritious, deeply loved by the majority of consumer groups. So when does lettuce usually ripen and come on the market? When will lettuce be planted? Let's get to know it with the editor.

When will lettuce be planted?

The planting time of lettuce needs to be determined according to the local climatic conditions, variety characteristics, facility conditions and the arrangement of planting stubble throughout the year. Lettuce in the Yangtze River basin overwinters in the open field, mainly spring lettuce, which is generally sown from September to October in the first year, and when the seedlings are planted with 5-6 true leaves in 40-50 days, they can survive the winter safely and have sufficient time to grow leaves after turning green in the second spring, and a high yield can be obtained after harvest from April to May.

Which season is lettuce?

Lettuce is generally ripe in spring and summer, so lettuce belongs to spring vegetables.

Planting techniques of lettuce

1. Soil preparation and fertilization

It is appropriate to select the soil with loose soil, good drainage, rich organic matter and strong water and fertility conservation, deep ploughing and drying, applying 2-3 tons of mature farm manure per mu, fine soil preparation after 7 days, soil moisture with 1.8-1.9 meters, flat soil moisture in the main season and high soil moisture in the off-season.

2. Sowing seeds

When the seedling field is ready, the seeds are sown directly on the seedling field. After watering, the seedling land is irrigated with 4.5% Pepsi EC 3000 times and 5% Kung Fu EC 3000 times to prevent underground pests. 15-20 square meters of seedling land is needed for planting in the field per mu. Generally, the seed amount per mu is 25,30g, covered with a sunshade net, and then compacted.

Generally transplant according to the row spacing of 32 × 35 cm, planting 4800-5200 plants per mu, and eliminate the seedlings whose stems have been enlarged when transplanting to avoid early bolting.

3. Field management

Watering in time after transplanting, watering ammonium hydrogen with water and adding 10 kg calcium per mu after transplanting survived. In the future, water and fertilizer control, strengthen mid-tillage, rosette stage to leaf ridge watering and topdressing, urea 10kg / mu, potassium sulfate 5kg / mu, dry and wet later. When the stem began to enlarge, the third topdressing was applied with 50 kg of ternary compound fertilizer, 10 kg of potassium sulfate and 15 kg of urea per mu.

Edible value of lettuce

1. Anticancer effect

Lettuce contains a kind of aromatic hydrocarbon hydroxylated fat, which can prevent liver cancer and gastric cancer, and can also alleviate the side effects of radiotherapy or chemotherapy in cancer patients. it is a kind of anticancer vegetable.

2. Increase fluorine and tonify blood

Lettuce is rich in fluorine, which can participate in enamel and dentin formation and bone growth. The organic compounds in lettuce are rich in iron that can be absorbed by the human body, which is very beneficial to patients with iron deficiency anemia. the iron contained in lettuce is easily absorbed by the human body under the action of organic acids and enzymes. The white serous from the stem of lettuce has the effect of tranquilizing and hypnotic, and has the function of regulating nervous system.

3. Diuresis and dredging breast

Lettuce is rich in potassium ion, which is 27 times higher than that of sodium salt, which is beneficial to the balance of water and electrolyte in the body and promote urination. Lettuce contains more nicotinic acid, which can increase milk secretion and is an important member of maternal diet.

4. Wide bowels and defecation

Lettuce contains a lot of plant cellulose, which can promote intestinal wall peristalsis, benefit digestive tract, help defecation, and can be used to treat all kinds of constipation.

5. Lowering blood pressure

Lettuce is a vegetable with high potassium and low sodium. It contains 212 mg potassium and 36.5 mg sodium per 100 grams of lettuce. Potassium is an essential element to maintain human life. It can dilate arteries, reduce peripheral vascular resistance, promote urinary sodium excretion, reduce cardiovascular burden, reduce arterial wall thickening in patients with hypertension, and achieve the purpose of reducing blood pressure. Hypertension, arrhythmia, often eat fresh lettuce, the curative effect is remarkable.

Through the above, I believe everyone knows something about the planting time of lettuce. The edible value of lettuce is very high, and even many people like to grow some lettuce at home. Every spring and summer season, the best season to eat lettuce, there is always endless delicious and nutritious lettuce and lettuce leaves.