The function of vegetables. Vegetables are an indispensable dish on our table. They will provide the human body with the nutrition it needs. Vegetables have many functions. I've compiled information about the functions of vegetables for you. Let's have a look.

Efficacy of vegetables 1 Prevention and treatment of cancer:

Cruciferae cabbage vegetables, such as broccoli, cauliflower, cabbage, cabbage leaves, kale, etc., contain indole (13C), sulforaphane, isothiocyanate, carotenoids and vitamin C, which have a good effect on preventing and treating tumors and cardiovascular diseases, especially broccoli.

The glucosinolates and glucosinolates contained in cruciferous vegetables such as cauliflower and cauliflower can induce an enzyme with detoxification function in the body. Regular consumption can prevent gastric cancer, lung cancer and esophageal cancer.

Asparagus is rich in glutathione and folic acid, which has a good effect on preventing neural tube defects and tumors in newborns.

Carrots are rich in carotenoids and a lot of soluble cellulose, which is beneficial to protect eyes, improve vision, reduce blood cholesterol, reduce the incidence of cardiovascular diseases and reduce the incidence of lung cancer. Carotenoids can produce vitamin A in human body after eating, which has the functions of stabilizing epithelial cells and preventing cancer caused by excessive cell proliferation.

Flavonoids, isoflavones, protease inhibitors, inositol, soybean saponin, vitamin B, etc. contained in soybeans, edamame, black beans, etc., have a good effect on lowering blood cholesterol, regulating blood sugar, reducing cancer incidence, and preventing cardiovascular diseases and diabetes.

Onion and garlic vegetables are rich in functional phytochemicals such as dipropylene compounds and methyl sulfide, which are beneficial to the prevention and treatment of cardiovascular diseases, can prevent cancer if eaten often, and have the functions of anti-inflammatory and sterilization. Besides, garlic can prevent colon cancer.

Tomato is rich in antioxidant lycopene, which can resist oxidation and reduce the incidence of prostate cancer and cardiovascular diseases. Tomatoes are rich in vitamin C, which can enhance the body's disease resistance, stimulate the body to produce anti-cancer interferon, and prevent the body from absorbing carcinogenic nitrosamines.

Eggplant contains a variety of alkaloids, which have the functions of inhibiting cancer, reducing blood fat, sterilizing and relaxing bowels.

Pepper and sweet pepper are rich in vitamins, carotenoids, pepper polyphenols and so on. The content of vitamin C in pepper ranks first among vegetables. A small pepper contains vitamins A, B, C, E, K, carotene, folic acid and so on. Secondly, pepper also contains minerals such as calcium and iron and dietary fiber. It can enhance blood coagulation and dissolution and is known as natural aspirin.

Celery is a biennial herb. Celery contains celery oil, protein, inorganic salts and rich vitamins, which has the functions of stopping bleeding, diuresis and lowering blood pressure in traditional Chinese medicine. Celery is rich in cellulose, which can promote gastrointestinal peristalsis, reduce the retention time of carcinogens in the digestive tract and weaken the harm of carcinogens to the body.

The protease contained in cucumber helps people to absorb protein.

Lycopene in tomato can promote the secretion of some cytokines with anti-cancer and anti-cancer effects, and activate the killing effect of lymphocytes on cancer cells. Proper intake of lycopene can reduce the incidence of prostate cancer, breast cancer and other cancers, and also has a preventive effect on gastric cancer and lung cancer.

Sweet potato prevents colon cancer and breast cancer. Scientists have found that sweet potato contains a chemical called hydroepiandrosterone, which can be used to prevent colon cancer and breast cancer.

Seaweed vegetables (including kelp, seaweed, Undaria pinnatifida, etc. ) contains high cellulose, is not easy to be digested, can promote intestinal peristalsis, and is conducive to the discharge of harmful substances in the body. The blood of cancer patients is mostly acidic, and seaweed rich in inorganic salts such as calcium can adjust and balance the pH of blood. In addition, eating seaweed regularly can prevent goiter and constipation.

Chinese cabbage and pumpkin contain trace element molybdenum, which can prevent the synthesis of nitrosamines in the body. Pumpkin also contains enzymes that decompose nitrosamines.

Mushrooms are characterized by low heat energy, high protein and high cellulose. The cellulose contained in mushrooms can absorb cholesterol, prevent constipation, and excrete harmful substances in the body as soon as possible, which has a certain effect on preventing hypercholesterolemia, constipation and cancer.

Slimming and skin care:

Cucumber: Propanolic diacid contained in cucumber helps to inhibit the conversion of carbohydrates in various foods into fat in the body.

White radish: White radish contains spicy mustard oil, which can promote fat metabolism and avoid fat accumulation under the skin.

Broccoli: Calorie 40/cup: Broccoli is rich in high-fiber components and can be cooked with tomatoes, onions, green peppers and other materials to make slimming soup. It is very useful when you are hungry, and it is low in calories and full.

Asparagus: calories 66 calories/pound: Asparagus is rich in vitamins A and C. It is a good choice to make salad or cook a cup of asparagus when you are free. It can be used as a snack when watching TV and listening to songs, which is healthy and not fat.

Bamboo shoots: Low-fat and low-sugar crude fiber bamboo shoots can prevent constipation, but patients with gastric ulcer should not eat more.

Eggplant: calories 19 calories/half bowl: scientific research shows that eggplant can prevent fat absorption in a meal and contains vitamins a, b and c, which is a delicious and beneficial food for dieters.

Lentils: 232 calories/cup: If eaten with green leafy vegetables, it can speed up the metabolism of the human body.

Wax gourd: rich in protein, crude fiber, calcium, phosphorus, iron, carotene and so on. Contains malonic acid, which can prevent fat accumulation in the body. Most obese people have too much water. Winter melon can also induce diuresis, and cooking soup with winter melon every day can reduce weight.

Celery: contains vitamins A and C, but most of them are water and cellulose, so the calories are very low. If you eat too much, you are not afraid of getting fat.

Mung bean sprouts: contain phosphorus, iron and a lot of water, which can prevent the formation of subcutaneous fat. Modern people lack cellulose, and eating more mung bean sprouts is good for health. Add a little vinegar when frying to prevent the loss of vitamin B and strengthen weight loss.

Porphyra yezoensis: In addition to being rich in vitamins A, B 1 and B2, the most important thing is that it is rich in cellulose and minerals, which can help to discharge waste and accumulated water from the body.

Spinach: Because it can promote blood circulation, so that the two legs farthest from the heart can absorb enough nutrition, balance metabolism, detoxify and lose weight.

Celery: On the one hand, celery contains a lot of calcium, which can supplement "foot strength", on the other hand, it also contains potassium, which can reduce the accumulation of water in the body.

The real beauty is to eat regularly, especially eating more vegetables can improve the skin condition and make the skin white and tender. 7 kinds of daily vegetables are recommended, and you can eat good skin if you eat them regularly.

Wax gourd is a beauty product, which has a remarkable effect on whitening skin. Wipe your face with wax gourd slices every day or often wash your face with wax gourd pulp, which can make your facial skin delicate and reduce chloasma. This may be related to the contents of histidine, urease, vitamins and trace elements in melon meat.

Wax gourd has always been regarded as the top grade of slimming, and it has the reputation of "slimming melon". Modern medical circles believe that the slimming effect of wax gourd is mainly due to its rich malonic acid, which can inhibit the conversion of sugar into fat, thus preventing the accumulation of fat in the human body from producing slimming effect. In Shennong's Classic of Materia Medica, it is said that winter melon is "good in color, beneficial to qi, not hungry, and long-term service makes people strong and anti-aging". Wax gourd contains trigonelline and propanol diacid, the former can accelerate the metabolism of the body, and the latter can prevent sugar from transforming into fat, thus playing a role in losing weight.

Mushrooms are nutritious, rich in protein and vitamins, low in fat and free of cholesterol. Eating mushrooms can make women secrete more estrogen, prevent aging and make skin gorgeous. In addition, mushrooms contain crude fiber, semi-crude fiber and lignin that are difficult for human body to digest, which can maintain the balance of intestinal water and absorb the remaining cholesterol and sugar and excrete them.

Cucumber is rich in protein, sugar, vitamin B2, vitamin C, vitamin E, carotene, nicotinic acid, calcium, phosphorus, iron and other nutrients. At the same time, cucumber also contains malonic acid, cucurbitacin, soft fine fiber and other ingredients, which can clean and whiten skin, maintain skin elasticity, inhibit the formation of melanin, eliminate sunburn and freckles, and relieve skin allergies. It is a traditional beauty product.

Potatoes are rich in B vitamins and a lot of high-quality cellulose, as well as trace elements, protein, fat and high-quality starch, which play an important role in anti-aging and disease prevention, and can effectively help women detoxify. Rich in vitamin C, it can restore women's whitening skin.

Carrots are called "skin food" and can moisturize the skin. It contains beta carotene, which can resist oxidation and whiten skin, remove excess cutin from skin, and also has calming and soothing effects on oily acne skin. Egg yolk and honey have moisturizing effect. In addition, carrots are rich in pectin, which can combine with mercury, thus eliminating harmful components in the human body and making the skin look more delicate and ruddy.

White radish: Chinese medicine believes that white radish can "benefit the five internal organs, make people white and clean muscles." Because white radish is rich in vitamin C, vitamin C is an antioxidant, which can inhibit melanin synthesis, prevent fat oxidation and prevent lipofuscin deposition. Therefore, eating white radish often can make the skin white and delicate.

Peas: "Compendium of Materia Medica" says that peas have the effect of "removing dark spots and making the face shiny". Eating more peas can remove spots and maintain beauty. Modern research has found that peas are rich in provitamin A, which can be converted into vitamin A in the body, and vitamin A has the function of moistening the skin, and is taken from general food without toxic side effects. Eating peas can also reduce swelling and stretch the skin, which can tighten the wrinkles around the eyes.

Vegetables of different colors have different functions:

Green vegetables: Green fruits and vegetables are rich in folic acid, which has been proved to be one of the "panacea" to prevent fetal neural tube malformation. At the same time, a large amount of folic acid can effectively remove too much homocysteine in the blood and protect the heart. In addition, green vegetables are also the best source of calcium, enjoying the title of "life element", and their reserves are more than milk containing calcium and rich in minerals, so eating "green" is regarded by nutritionists as the best way to supplement calcium.

Moreover, green vegetables are rich in vitamins C, B 1, B2, carotene and various trace elements, which have a certain sedative effect on patients with hypertension and insomnia and are beneficial to the liver. Green vegetables also contain lemon yellow, which can prevent sugar from being converted into fat.

Yellow vegetables: such as carrots, soybeans, peanuts and apricots. , rich in two vitamins: one is vitamin A; The other is vitamin D, which can protect gastrointestinal mucosa and prevent gastritis, gastric ulcer and other diseases. Vitamin D can promote the absorption of calcium and phosphorus, and has a certain preventive effect on common diseases such as rickets in children, myopia in adolescents and osteoporosis in middle-aged and elderly people. Therefore, it is undoubtedly wise for these people to pay more attention to yellow food.

Leek, pumpkin and carrot are rich in vitamin E, which can reduce skin spots, delay aging, benefit spleen, pancreas and other organs, and regulate gastrointestinal digestive function. Lutein contained in yellow vegetables and green vegetables has a strong anticancer effect.

Red vegetables, such as tomatoes, red peppers and carrots, can increase people's appetite and stimulate the excitement of the nervous system. Red food contains carotene and other red pigments, which can increase the vitality of cells in human resistant tissues. In addition, carotene contained in carrots can be converted into vitamin A in vivo, which plays a role in protecting human epithelial tissues such as respiratory mucosa. Regular consumption can also enhance the body's ability to resist colds.

Purple vegetables: Purple fruits and vegetables contain anthocyanins, which have a strong anti-hardening effect, thus preventing strokes caused by heart attacks and thrombosis. They have the functions of regulating nerves and increasing adrenal secretion. Recent research also found that purple eggplant contains more vitamin ρ than other vegetables, which can enhance the adhesion between somatic cells, improve the strength of microvessels and reduce the probability of cerebral vascular embolism. This kind of food includes black strawberries, cherries, eggplant, plums, purple grapes, black pepper, purple eggplant, lentils and so on.

Black vegetables: Black vegetables include black eggplant, kelp, black fragrant shavings, black fungus and so on. It can stimulate human endocrine and hematopoietic system and promote saliva secretion. Auricularia auricula contains anti-tumor active substances, which can prevent and treat esophageal cancer, intestinal cancer and bone cancer.

Black food such as laver, black rice and black-bone chicken can obviously reduce the incidence of serious diseases such as arteriosclerosis, coronary heart disease and stroke. In addition, auricularia auricula can prevent and treat urinary calculi, and black-bone chicken can regulate women's menstruation.

White vegetables: White vegetables include white gourd, white gourd, water bamboo, lotus root, bamboo shoots, white radish and so on. It has a certain effect on regulating vision and stabilizing mood, and is beneficial to patients with hypertension and cardiomyopathy.

The role of vegetable Oenanthe javanica

Sweet, flat and non-toxic. Nourish the heart and benefit qi, make people fat and healthy, kill drugs and poison, and cure women's red tide.

wax gourd

Sweet, flat, slightly cold and non-toxic. Yiqi is not hungry, but happy to keep noodles.

cucumber

Sweet, flat and cold, toxic. The attack of dynamic qi makes people feel deficient heat. Do not eat too much.

carrot

Sweet, flat and non-toxic. Regulate qi and regulate the stomach.

Small carrot

Sweet, warm and nontoxic. Governing the lower qi and eliminating the valley, eliminating phlegm addiction, treating thirst and exterior toxicity.

wood ear

It tastes bitter, cold and poisonous. Benefiting the five internal organs and releasing stomach poison gas. Do not eat too much.

bamboo shoots

Sweet and nontoxic. Mainly to quench thirst, benefit waterways and replenish qi. Eating too much will make you sick.

Chinese yam

Sweet, warm and nontoxic. Tonify middle energizer, tonify qi, treat wind dizziness, stop lumbago and strengthen bones and muscles.

lotus root

Sweet, flat and non-toxic. Main tonic, nourishing heart, benefiting qi, eliminating all diseases, relieving summer heat and quenching thirst, and promoting blood circulation.

sunflower

Sweet, cold and flat, non-toxic. Be the master of all the dishes. Treat cold and heat in internal organs, emaciation, carbuncle, diuresis, and treat women's lactation difficulties.

radish

Bitter, warm and nontoxic. It mainly benefits the five internal organs, intelligence and qi. The stem is bright.

coriander

Pungent, warm and slightly toxic. Eliminate the valley, make up the deficiency of the five internal organs, and facilitate urination. (A parsley. )

mustard

Pungent, warm and nontoxic. The main purpose is to eliminate kidney evil, benefit nine orifices, improve eyesight and focus on the middle energizer.

verdant

Pungent, warm and nontoxic. Main eyesight, tonify deficiency, treat typhoid fever and sweating, and reduce swelling.

garlic

Xin, Wen, toxic. Mainly to disperse carbuncle and reduce swelling, remove cold and prevent gas. The only one is the best.

(China) Leek

Pungent, warm and nontoxic. Consolidate the five internal organs, remove stomach heat, reduce qi and tonify deficiency. You can eat it for a long time.

Tianjin cuisine

Bitter taste, flat sex, non-toxic. In addition to the yellow-faced woman, being strong will clear the heart and benefit the five internal organs. )

bottle gourd

It tastes bitter, cold and poisonous. The main face and limbs are swollen and go into the water. Eating too much makes people vomit.

Snake melon

Sweet, cold and poisonous. Benefiting stomach and quenching thirst. Do not eat too much. (that is, a small melon. )

bottle gourd

Sweet, flat and non-toxic. Mainly eliminate edema and promote qi circulation.

mushroom

Sweet, cold and poisonous. Angry. Do not eat too much.

mushroom

It tastes bitter, cold and poisonous. It's boring to send five zang-organs wind blocking meridians and moving hemorrhoids.

Sun Pu

Sweet and nontoxic. Tonifying the middle energizer and benefiting qi, and treating blood vessels.

taro

Xin, Ping, toxic. The stomach is wide, the skin is full and smooth. Wild taro is not edible.

Lettuce; lettuce

Bitter taste, cold nature and non-toxic. Dominate the five internal organs, open the chest to block qi and open the blood vessels.

Chinese cabbage

Sweet, warm and nontoxic. The main meridian of the stomach, in addition to chest trouble, quench thirst.

Crown daisy

Sweet, flat and non-toxic. Mainly dredge the stomach, rest at ease, and eliminate water and drinks.

aubergine

Sweet and cold, with some poison. Wind, sores, chronic diseases. Do not eat too much.

fuchsia

It tastes bitter, cold and non-toxic. Know nine tricks. Amaranth is good for essence. Vegetables should not be eaten with turtles.

cradle head

Pungent, warm and nontoxic. Main wind-heat, erysipelas and mastitis.

wave

Sweet in taste, cold in nature and slightly toxic. Benefiting five internal organs, clearing stomach heat and relieving hangover. (that is, bare roots. )

Various dishes

Sweet, cold and non-toxic. Regulating middle qi, expelling wind and benefiting five internal organs.

coriander

Xin, Ping, non-toxic. When eaten with all the dishes, it smells delicious and fishy.

Polygonum cuspidatum

Pungent, warm and nontoxic. Main eyesight, moderate temperature, cold resistance and moisture resistance.

Maya

It tastes sour, cold and nontoxic. Take care of blindness, dispel cold and heat, kill all kinds of insects.

smallpox

Sweet, flat and poisonous. It is slightly similar to mushrooms, but the gender is not detailed. (Born in Wutai Mountain. )

Hui Hui onion

Pungent, warm and nontoxic. Warm the middle, eliminate the grain, reduce the gas and kill insects. Chronic food attack.

Mannan seed

Sweet, flat and non-toxic. Li Musashi, reduce the true qi and clear your mind. (The name is Didi. )

Edible tender leaves for braking.

It tastes bitter, cold and poisonous. Don't eat more when you are angry.

Osmunda japonica

Sweet, flat and non-toxic. Benefiting qi, moistening muscles, refreshing, and strengthening the will.

Painful shopping

Bitter taste, cold nature and non-toxic. Treat yellow face, strengthen body, stop drowsiness, and apply various sores.

Yushuren

Pungent, warm and nontoxic. You can make sauce, which is very delicious. It can help lung qi and kill insects.

Shojaei Moore

Sweet, flat and non-toxic. Warming the middle energizer, benefiting qi, and removing heart cold and pain. (that is, the root of radish. )

Chu Er

Sweet, flat and non-toxic. Dredge meridians, lower qi and open diaphragm. (that is, the root is also. )

Shandangen

Sweet, flat and non-toxic. Treat abdominal distension caused by pathogenic factors and eliminate sores and swelling. A lily. )

Edible seaweed

It tastes salty, cold, slightly fishy and non-toxic. Main bile tumor, broken gas nucleus, carbuncle swelling. Do not eat too much.

The above introduces the functions of common vegetables and the general functions of vegetables. When choosing vegetables, we can buy different vegetables according to our own situation. It is best to eat seasonal vegetables, which are nutritious and healthy.

The role of vegetables 3 basic knowledge of vegetables

Vegetable purchasing

Look at the color: there are many kinds of vegetables with different nutritional values. Generally speaking, it can be divided into two categories by color: dark green leafy vegetables, such as spinach and amaranth; These vegetables are rich in carotene, vitamin C, vitamin B2 and various minerals. Light-colored vegetables, such as Chinese cabbage and lettuce, are rich in vitamin C and low in carotene and minerals. Some vegetables are abnormal in color, so pay attention. For example, the leaves of vegetables have lost their usual green color and are dark green, and the green color of edamame is abnormal. They may have been sprayed or soaked with methamidophos pesticide before harvesting and are not suitable for purchase.

Look at the shape: Vegetables with normal shape are generally cultivated artificially, and they can be safely eaten without being treated with hormones and other chemicals. "Abnormal" vegetables may be treated with hormones, such as leeks. When its leaves are particularly broad, which is 1 times wider than common broad-leaved leek, hormones may be used in the cultivation process. Hormone-free leeks have narrow leaves and have a strong fragrance.

Look at the freshness: many consumers think that there are many wormholes in the leaves, which means that it is safe to eat this dish. In fact, this is not reliable. Whether vegetables are susceptible to insect pests is determined by the different components of vegetables and the specificity of odor. Some vegetables are especially favored by pests, such as green vegetables, Chinese cabbage, cabbage, cauliflower and so on. If you have to spray medicine frequently, it will inevitably become a "multi-drug vegetable" with serious pollution. The amount of chemical fertilizer applied to various vegetables is also different. Excessive application of nitrogen fertilizer (such as urea and ammonium sulfate). ) will cause serious nitrate pollution of vegetables. Through the sampling inspection of vegetables in the market, it is found that the order of nitrate content from strong to weak is: root vegetables, potato taro, green leafy vegetables, Chinese cabbage, onion and garlic, beans, melons, eggplant fruits and edible fungi. The rule is that the pollution degree of roots, stems and leaves of vegetables is much higher than that of flowers, fruits and seeds. This law can guide us to eat vegetables correctly, and try to eat more melons, fruits, beans and edible fungi, such as cucumbers, tomatoes, edamame and mushrooms.

Vegetable placement

Stems and vegetables with flower buds and stem tips are placed vertically.

Some stem vegetables with flower buds and shoot tips, such as Chinese cabbage, Chinese kale, asparagus and green onions, will continue to grow and bloom after harvest. The growth direction of these vegetables is perpendicular to the ground, so if they are laid flat for 5~7 days after harvesting, the top of the vegetables will gradually bend, which will affect the appearance of the vegetables. If you put it vertically, there is no such problem.

Head leaf vegetables, such as Chinese cabbage, cabbage, lettuce and mustard. The corruption of meatball dishes starts from the inside, and the slight corruption is imperceptible to the naked eye. Put the cabbage upside down or sideways so that the roots don't touch the ground. The outer layer of leaves is cold-resistant and collision-resistant, which can protect Chinese cabbage. Tear off the outer yellow leaves when eating.

Some dishes need special display. Garlic yellow can be wrapped in the leaves of fresh Chinese cabbage and placed vertically in a cool place. It can be kept fresh for several days without touching water.

When potatoes and apples are stored together in a cool place, apples will release an ethylene gas, which will age other fruits and vegetables, thus inhibiting potato germination.

When curing taro, remove the soil, dry it, wrap it in dry newspaper, and then put it in a cool and ventilated place.

Ginger is not suitable for cold storage, because it has been fiberized and is easy to lose water. Can be stored in wet but not wet fine sand.

When keeping lotus roots fresh, wash off the soil, put them in a pot, fill them with clear water, soak them, and change the cold water once a day or two.

Vegetable preservation

The vegetables you bought are suitable for standing vertically, not horizontally. Vegetables placed vertically have strong vitality, and chlorophyll, water content and vitamins are better preserved than those placed horizontally. Vegetables should not be cut and stored. After cutting vegetables, the nutrients will be quickly lost and easily oxidized, and at the same time, the chances of microbial invasion will increase, which will easily lead to deterioration and rot.

It is not appropriate to store different vegetables in the refrigerator. Because each vegetable has different requirements for temperature and humidity. Such as cucumber, bitter gourd, cowpea, pumpkin and other wet vegetables, suitable for storage at about 65438 00℃, but not lower than 8℃; Most leafy vegetables like cold, so they are suitable for storage at 0℃ to 5℃, but not below 0℃. The suitable humidity for storing vegetables is about 85%. When storing vegetables, you can choose a thinner fresh-keeping bag, put fresh and intact vegetables into the fresh-keeping bag, stick 6 holes in the bag with a needle, and then seal the plastic bag. Store in a refrigerator with a suitable temperature. Be sure to remember that the vegetables you buy should be packed in non-toxic and harmless (generally non-PVC) food bags.

Unique skills

Peeling: there is wax on the surface of vegetables, which is easy to adsorb pesticides. Therefore, vegetables that can be peeled should be peeled before eating.

Washing: Generally, vegetables are washed with clear water for at least 3-6 times, then soaked in light salt water and washed again. Cut the wrapped vegetables first, soak them in clear water for 1 ~ 2 hours, and then rinse them with clear water to remove residual pesticides.

Alkali washing: first put a spoonful of alkali powder (anhydrous sodium carbonate) or ice alkali (crystalline sodium carbonate) into water and stir evenly, then add vegetables. Soak for 5 ~ 6 minutes, pour out alkaline water, and then rinse with clear water. If there is no alkali powder or ice alkali, baking soda can be used instead, but it usually takes about 15 minutes, and the soaking time is appropriately extended.

Boiling: The best way to remove some residual pesticides is scalding, such as green pepper, cauliflower, beans and celery. It's best to blanch in boiling water first, and then fry or burn it in a pot. According to experiments, more than 90% of the residual pesticides can be removed.

Sunlight exposure: Using the multi-spectral effect in sunlight, some residual pesticides in vegetables will be decomposed and destroyed. In this way, there is less pesticide residue in dried vegetables. According to the measurement, the residual loss of organochlorine and organomercury pesticides reached 60% when fresh vegetables and fruits were irradiated in the sun for 5 minutes. For vegetables that are convenient to store, it is best to leave them for a while. Oxygen in the air and chromozyme in vegetables have a certain decomposition effect on residual pesticides. After buying vegetables and leaving them at room temperature for about 24 hours, the average disappearance rate of residual chemical pesticides is 5%.

Salt washing: chemical pesticides and fertilizers are often used in vegetable planting. In order to eliminate the pesticide residue on vegetable epidermis, it can achieve good results to wash vegetables with 1% ~ 3% light salt water. In addition, vegetables harvested in autumn often hide various insects in the lines on the roots or the back of vegetable leaves, which can be easily removed by washing vegetables with clear water.

It is not advisable to cut melons and vegetables before washing: some people like to cut melons and vegetables before washing. This is not right. Because melons and vegetables contain a variety of vitamins and inorganic salts, these vitamins will be dissolved in water through the incision on the melons and vegetables, which will be cut and washed first and then lost. Therefore, melons and vegetables should be washed first and then cut.

In addition, washing vegetables with rice washing water can remove some pesticides left on vegetables. At present, most organophosphorus pesticides used in China are methamidophos, phoxim, dichlorvos, dimethoate and so on. These pesticides will lose their toxicity when they encounter acidic substances. Soaking in rice washing water for about 10 minute and washing with clear water can reduce the residual pesticide components in vegetables.