An introduction to lettuce

An introduction to lettuce. It is a vegetable with a crisp texture that often appears in our lives. It is good for the human body and contains Rich in nutrients, it can also clear away heat, detoxify and reduce internal heat. Let me share with you an introduction to lettuce. Introduction to lettuce 1

Rapeseed belongs to the Asteraceae family. It is a pointed-leaf lettuce with young shoots and leaves as its products. The leaves are long lanceolate, and its appearance is a bit like lettuce. "Head", the leaves are slender and flat, and the bamboo shoots are thin and short. From the perspective of blood relationship, romaine lettuce is a variant of leaf lettuce - romaine lettuce. It is similar to the familiar lettuce, so it is also called lettuce. It is light green in color and grows vigorously. It has disease resistance, strong adaptability, crisp and tender texture, extremely fresh and fragrant taste, and is known as "Phoenix Tail". Lettuce is resistant to heat and cold, has strong adaptability and cold tolerance, likes moisture, is resistant to pests and diseases, has a sweet and crisp quality, has less fiber, and has a suitable growth temperature of 20-25°C.

Lettuce is a new face appearing in the vegetable market. It is also known as oatmeal. In some places, it is also called bitter cabbage and beef lettuce. It belongs to the Asteraceae family and is known for its tenderness. The tips and young leaves are a kind of lettuce with pointed leaves. The nutritional value of lettuce is slightly higher than that of lettuce, but far better than that of lettuce. For example, compared with lettuce, the protein content is 40% higher, carotene is 1.4 times higher, calcium is 2 times higher, iron is 33% higher, and selenium is 1.8 times higher.

Since lettuce is a type of lettuce with pointed leaves, there are not many varieties. The most commonly used pure lettuce is imported from abroad. China's research on lettuce started relatively late, and there are no particularly good varieties yet. Lettuce is heat-resistant, cold-resistant and highly adaptable. It can be planted in spring and harvested in summer, planted in summer and harvested in autumn, planted in early autumn and harvested before New Year's Day, and produced in greenhouses in winter. In general greenhouse production, it is better to grow strong seedlings before the cold winter arrives. That is, avoid the cold winter season in January during the seedling stage. Sow seeds and raise seedlings in the shed from January to mid-March in early spring. The standard shed is built with 2 rows, with a ditch in the middle. The rows are plowed deeply, and water is poured enough. The seeds are sown in the rows and covered with seed mud to cover the seeds. Spread flat plastic film (2 layers of film and 1 layer of mulch film). Generally, seedlings will emerge in 10 to 15 days. Seedlings will emerge longer during rainy and low temperatures. After planting the seedlings, remove the plastic film and ventilate the seedlings. Prevent the seedlings from being damaged by high temperatures during the day and prevent freezing damage at night. Seedlings are raised in the open field from April to June during summer sowing. Choose high-potential land, connect 2-meter trenches, apply decomposed manure deeply, and build a border. flat. Soak the seeds for 3 hours and sow them after they are dry. Pour enough water into the nursery bed, spread the seeds on the border, cover it with seed mud, and pour enough water. In case of high temperature and drought, cover the border with a sunshade net, and uncover the net in the morning and evening after the seedlings are gathered. The seedbed should have moderate fertilizer and water, and should not be too dry. ; For autumn sowing from July to September, lettuce seedlings need to be soaked for germination. The method is to wrap the seeds in gauze and soak them in water for 3 to 4 hours, then take them out and put them in the refrigerator for 10 to 15 hours. If 75% of them sprout, they can be sown. It is best to use small sheds or greenhouses for autumn sowing and seedling cultivation. After the seedlings emerge, pay attention to the soil moisture, not too dry or wet, and pull out weeds in time to ensure smooth drainage. For winter cultivation, seedlings can be sown and raised in November-December, provided that the greenhouses are properly fertilized. For basal fertilizer, plow the fields, and make 2 or 3 fields in a 6-meter-wide greenhouse. The soil in the sowing field bed should be thinned, and water should be poured every other day, and then broadcast. The seeds should be sown at about 150 grams per minute, which can be used for planting in 3 large fields. After sowing, sprinkle a layer of nutritious soil to cover the seeds, and then cover them with a layer of plastic film or mulch. After the seedlings emerge, remove the flat film in time, strengthen management, and do a good job of ventilation and warmth. The age of seedlings varies greatly depending on the season. It takes 20-30 days in summer and autumn, and 50-70 days in winter and spring. Introduction to lettuce 2

What are the effects of lettuce?

1. Clearing heat and diuresis

Lettuce is cold in nature. It can reduce heat, clear away heat, relieve irritability and quench thirst. It has the effect of diuresis and reducing swelling, so it is suitable for consumption in spring and summer. People with internal heat and oral ulcers can improve it by eating lettuce.

2. Clear liver and promote cholestasis

Lettuce can promote the secretion of digestive juice powder, increase appetite, improve liver function, promote bile formation, prevent cholestasis, and effectively prevent biliary liver disease hardening.

3. Diuresis and swelling

Lettuce always contains active ingredients such as mannitol, which has the effect of diuresis and promoting blood circulation. Regular consumption of lettuce can promote urination. Reduce the pressure on the atria and kidneys, which is helpful for patients with high blood pressure and heart disease.

4. Calm and calm the mind

Lettuce contains lettuce, which has a calming and soothing effect. Regular consumption of lettuce can help relieve nervous tension, help improve sleep, and regulate and improve nerves. Weakness etc.

5. Reduce fat and lose weight

Lettuce is rich in dietary fiber, which can eliminate fat, reduce cholesterol absorption, and can effectively reduce the body’s blood lipids. Lettuce can eliminate fat and relieve constipation. It is also a low-calorie vegetable, so eating lettuce can also help you lose weight.

6. How to eat lettuce

Lettuce can be eaten raw or cooked. Raw food can be eaten cold or dipped in various seasonings. Cooked food can be fried. You can also eat it by rinsing it or making it into soup. It has a unique taste and is rich in nutrients. Since lettuce will become old easily and lose a lot of nutrients if cooked for too long, it is recommended to shorten the cooking time.

7. Taboos for eating lettuce

1. Most people can eat lettuce, but due to its cold nature, it is recommended not to eat too much, especially if you have a weak spleen and stomach and frequent urination. patient.

2. Lettuce can be bought and eaten immediately. The storage time should not exceed 3 days. When storing, keep away from apples, pears, bananas and other fruits to avoid inducing russet spots.

3. Lettuce has a certain stimulating effect on the optic nerve, so people with eye diseases, especially night blindness, should not eat more. Introduction to lettuce 3

Effects and functions of lettuce

1: Preventing internal heat

Clearing heat, detoxifying and preventing internal heat are the most important functions of lettuce , because lettuce not only tastes bitter and pungent, but also contains a large amount of lettuce, which can cleanse the heat in the human body and prevent a variety of symptoms of internal heat. People usually suffer from sores in the mouth and tongue, sore throat, gum swelling, etc. When symptoms occur, eating more lettuce can make the symptoms better.

2: Cleansing the liver and promoting gallbladder

Cleansing the liver and promoting gallbladder and improving human liver and gallbladder function are also important effects of lettuce, because lettuce can accelerate the secretion of digestive juices in the human body and improve liver function. Function, it can also repair damaged liver cells. It can accelerate bile production in the human body. Regular consumption can maintain human liver and gallbladder health, and can also reduce the incidence of jaundice, chronic hepatitis and cholecystitis.

3: Lose weight

People usually eat more lettuce, which can also help them lose weight. Lettuce is a healthy vegetable with low fat and low calories. It contains a lot of carbohydrates. And dietary fiber, people can increase the body's feeling of fullness after eating it, but will not absorb too much fat and calories. The dietary fiber it contains can also shorten the defecation time of the human body and speed up the production and discharge of stool in the human body. In this case Human body weight can be significantly reduced, and the incidence of body obesity will also decrease.

4: Regulate nerves

Lettuce also has a significant regulating effect on human nerves, because it contains lettuce, which can directly act on the human central nervous system and calm the nerves. It is an important component. After the human body absorbs this substance, it can enhance the central nervous system function and relieve human tension and anxiety. The lettuce contained in lettuce can also prevent and relieve neurasthenia and prevent adverse symptoms such as insomnia and forgetfulness.

Lettuce is a kind of green leafy vegetable with a fresh and tender taste. It is relatively common in daily life. Its leaves are mostly long needle-shaped. This vegetable is actually a kind of leaf lettuce. It has a fresh and tender taste with a hint of lettuce. It has a natural fragrance and can be eaten raw or stir-fried over high heat.

Efficacy and functions of lettuce

1: Prevent anemia

Anemia is a high-risk disease in humans. Eat more lettuce at ordinary times. Eating lettuce can prevent anemia, because lettuce is rich in trace elements, which can accelerate the synthesis of hemoglobin in the human body and enhance the body's own hematopoietic function. Regular eating of lettuce can keep the body's qi and blood full, and can also make the skin Keeping your skin rosy can reduce the incidence of anemia and relieve the uncomfortable symptoms caused by anemia in the human body.

2: Lose weight

Lettuce is also a low-fat and low-calorie green vegetable. It contains a large amount of dietary fiber. People know that it can accelerate the decomposition of fat in the body and It can promote gastrointestinal motility and prevent food residues from accumulating in the body. Regular consumption of lettuce can significantly reduce weight and play an important role in weight loss.

3: Moisten the lungs and relieve coughs

Eating more lettuce can also play an important role in moistening the lungs and relieving coughs, because lettuce has a certain natural effect on the human throat and can eliminate Inflammation in the human body, it can also promote the dilation of the trachea and eliminate inflammation in the human trachea, and can dilute the mucus in the trachea, allowing the phlegm in the human body to be discharged from the body as soon as possible, and can also significantly reduce the symptoms of coughing and asthma.

4: Diuretic and detoxification

Lettuce is also a healthy food that can diuretic and detoxify. It can speed up the production and excretion of urine in the human body, and can remove harmful substances from the human body. The urine is excreted from the body together, which can reduce their harm to the human body. In addition, lettuce is also a green vegetable with a cool nature. Eating it in hot summer can clear away heat and detoxify, prevent heatstroke, and can also quickly alleviate polydipsia and physical weakness caused by heatstroke.