Investigate and list the prices of out-of-season vegetables and fruits; What's wrong with eating often? What should I pay attention to when buying food in the supermarket?

The so-called bad, mainly from two reasons:

1. Although the growth environment of anti-season agricultural products can be adjusted by some means, some special growth hormone substances will be added to adapt to the anti-season. Such as rooting agent, etc. These have little to do with the environment, but mainly the biological clock of the plant itself. To some extent, the harm to human body comes from the damage to human skills caused by the accumulation of chemical substances.

2. Out-of-season agricultural products do not grow naturally, so the nutritional structure and so on are different from normal agricultural products, and this difference is unhealthy in a sense. ?

In May this year, a consumer reminder from the Beijing Food Safety Office said: People should be careful to buy out-of-season vegetables. Experts say that anti-season vegetables are mainly greenhouse vegetables. If it is pollution-free food, the quality is not much different from that of products in normal seasons. But if not, be careful. The reason for this is the following：

1, too much pesticide accumulated in greenhouse vegetables?

Out-of-season vegetables are mainly greenhouse vegetables, and the high temperature and humidity in the greenhouse is not conducive to pesticide degradation, leaving most of them on vegetables. Trace pesticides accumulate in the body for a long time, which is easy to cause damage to liver and kidney, anemia, desquamation and even leukemia. Insufficient light in greenhouse vegetables leads to high nitrate content, which can lead to dizziness, nausea, convulsions, coma and even death. Long-term consumption of this contaminated vegetable will cause chronic or acute poisoning. ?

2. Long transportation time and more nutrient loss?

Out-of-season vegetables are often transported for a long distance, which will cause certain nutritional losses. According to nutritionists, in the transportation process, within three days, green garlic and onion will lose 50% carotene, mung bean will lose 60% vitamin C, and natural anticancer substances and enzymes in some foods will also be destroyed during transportation. In addition, all kinds of dust and fuel waste gas on the road, as well as short-term cold, hot, dry and wet climate changes will affect the nutritional composition of vegetables. ?

It is this news from the government department that has aroused widespread concern in society, and thus opened the prelude to the theory of harmful anti-season vegetables. ?

Out-of-season vegetables, what do experts say?

Agricultural experts say: "the theory of harmful anti-season vegetables" is not accurate?

Not all out-of-season vegetables are greenhouse vegetables?

Out-of-season vegetable production can be summarized into three types: 1, using three-dimensional climate resources in mountainous areas to produce out-of-season vegetables in summer and autumn; 2. Take advantage of the warm microclimate in winter and spring to produce anti-season vegetables in winter, such as Hainan and other areas, which are suitable areas for developing anti-season vegetables in winter because of abundant light and heat resources. 3. Use protective and semi-protective facilities for off-season planting, which is what we call greenhouse vegetables. ?

High temperature is more conducive to the decomposition of chemicals?

For "anti-season vegetables planted in greenhouses will affect pesticide degradation because of high temperature and high humidity, and pesticide residues will be large." This statement is not accurate. ?

Experts pointed out that whether vegetables are polluted has nothing to do with whether they are planted out of season, but with factors such as whether pesticides and fertilizers are used reasonably or excessively. Because different kinds of pesticides have different decomposition conditions, they cannot be summarized by "high temperature". In most cases, high temperature is actually more conducive to the decomposition of chemicals. In addition, "high nitrate content" has nothing to do with light, but depends on whether nitrogen fertilizer is applied excessively and whether light is sufficient, which has nothing to do with food safety. ?

Is the nutritional value and taste slightly inferior?

Regarding the nutrition and taste of greenhouse vegetables, experts said that the time and intensity of greenhouse vegetables exposed to sunlight are not as good as those grown under natural conditions. Sunlight will affect the synthesis of sugar and vitamins in vegetables, so the content of sugar and vitamins in out-of-season vegetables will be slightly lower than that in similar seasonal vegetables, which is also the reason why most out-of-season vegetables taste lighter. ?

But this does not mean that the nutrition of out-of-season vegetables is not as good as that of in-season vegetables, because people eat vegetables, except vitamins, mainly focusing on the absorption of cellulose and chlorophyll, and sugar and vitamins can be supplemented by other foods. As long as it is cooked properly, out-of-season vegetables can be safely eaten. ?

Chinese medicine says: Eat less out-of-season dishes?

Pay attention to "qi" and "taste" when eating medicine. Because in the view of Chinese medicine, food and medicine are all composed of smells, and their smells can only be obtained when they are in season, that is, when they grow up and conform to the solar terms. ?

There is a famous saying in Huangdi Neijing called "four thoughts on northern affairs", which means that drugs and food should be prepared according to the gasification of yin and yang in nature. This kind of medicine and food has the essence of heaven and earth, pure smell and high nutritional value. Therefore, if people want to eat sun dishes, it is best to eat wild vegetables and take medicine. ?

Animals and plants can only mature in a certain growth cycle, and the smell contained is enough. Dishes that violate the law of natural growth violate the law of the rise and fall of cold and heat in spring, summer, autumn and winter storage, which will lead to uncoordinated cold and heat and chaotic smell of food and become so-called "dishes". There is no seasonal temperament, but it has its shape without its quality. Such as cabbage in summer, the appearance is ok, but the taste is far less than that in winter; Most tomatoes in winter are hard and tasteless. These out-of-season vegetables contain too many hormones, which will be harmful to the human body if eaten for a long time. Confucius famously said, "From time to time, don't eat." In other words, try not to eat dishes that don't meet the solar terms. ?

How to safely eat out-of-season vegetables? ?

With the development of society, if you can only eat potatoes, cabbage and carrots every winter, it will definitely not work. How can we choose the least dangerous vegetable among many out-of-season vegetables? How can I eat the healthiest out-of-season vegetables? ?

Is it best to go to a regular supermarket or a farmer's market to buy food?

The vegetables of stall vendors are as glamorous in appearance as those of regular supermarkets and farmers' markets, and the prices are relatively cheap, which just caters to the psychology of some consumers. But these vegetables may have problems in one way or another. ?

The scattered stalls in the market are generally produced and sold by themselves, and they have not passed the relevant quality and safety tests at all, so they may be unsafe to eat and have great hidden dangers. Because they are scattered and there is no unified purchase channel, the quality inspection department can't start testing at all, so we must go to a regular supermarket or a farmer's market to buy food, and don't be greedy for petty gains. ?

Do you want to choose out-of-season vegetables with "coats"?

Choose vegetables carefully and distinguish shapes and colors carefully. Try to buy less vegetables with strange shapes and colors; Although some vegetables have been ripened, the peel or other places will still leave green marks, so pay attention when buying them. ?

There are almost no absolutely pollution-free agricultural products, and "pollution-free" is only relative. As long as it passes the relevant national tests, it is a vegetable that can be safely eaten. Therefore, it is best for citizens to buy green and pollution-free vegetables with clear signs. ?

Experts remind the public that choosing seasonal vegetables and eating local dishes is a better choice than eating out-of-season vegetables, and conforming to nature is the best health rule. If you want to buy out-of-season vegetables, you'd better buy more onions, carrots and eggplant. These vegetables with skins have less pesticide residues. ?

Cleaning and manufacturing methods are important?

Pesticides can easily remain on vegetables. If vegetables can be peeled, peel them as much as possible. When cleaning vegetables that cannot be peeled, soak the vegetables in clear water for 20 ~ 30 minutes to fully dissolve the pesticides, and then rinse them repeatedly with clear water. Or soak vegetables in rice washing water for 10 minute, then pour out the immersion liquid, and then rinse repeatedly with flowing clean water. Alkaloids in rice washing water have a good dissolving effect on pesticides; If possible, you can also blanch the vegetables with hot water first, and then make the next step. You can also use stir-frying and other methods to remove pesticide residues on vegetables. ?

Can't we treat off-season vegetables marked as "pollution-free vegetables" lightly?

The so-called "pollution-free vegetables" refer to vegetables produced in a certain ecological environment according to certain production technical regulations, and tested by legal professional quality inspection departments, which do not contain toxic and harmful substances and meet national standards. "Safe food" is the common name of "pollution-free vegetables". ?

As consumers, buying pollution-free vegetables does not mean buying vegetables without pesticides, but pesticide residues meet national standards and will not cause harm to human body. Vegetables bought from the market had better be soaked in cold water for about half an hour before eating. ?

Related links: Be cautious when buying out-of-season fruits?

Although it is winter, there are still many out-of-season fruits on the market. Many out-of-season fruits are ripened and kept fresh with some chemicals. In this process, some out-of-season fruits have become "problem fruits". ?

We have listed four kinds of common problem fruits here to remind everyone to pay attention. ?

Strawberry: hollow in the middle and irregular in shape. Too big strawberries are usually caused by too many hormones. After using ripening agent or other hormone drugs, the long-term growth of strawberry becomes shorter, the color becomes fresh, but the fruit taste becomes weak. ?

Banana: In order to make banana skin yellow and beautiful, some unscrupulous traders use sulfur dioxide to ripen it, but the pulp is still hard and not sweet at all. Sulfur dioxide is harmful to human body. ?

Watermelon: Super-standard use of ripening agent and swelling agent. The stripes on this watermelon skin are uneven, and the flesh is particularly bright after cutting, but the melon seeds are white and have a bad smell in the mouth. ?

Grapes: Some unscrupulous traders and fruit farmers use ripening agents to soak immature green grapes in diluent, and the green grapes will become purple grapes in a day or two.

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? -As the Spring Festival approaches, many citizens will have the idea of buying some higher-priced vegetables and fruits, but they don't know that most of the higher-priced vegetables on the market are out of season. With the popularization of greenhouse vegetables, young people's concept of vegetable season has become increasingly vague. What are the seasonal dishes? There is a saying circulating on the internet that "eating out-of-season vegetables does not conform to the laws of nature and will destroy your balance." Is it true?/You don't say.

Liu Yang

Citizen concept: eat "expensive" food in the New Year.

During the festival, when friends and relatives get together, the most common toast is "eat and drink well", which shows that "eating well" has always been the top priority during the festival, and "eating well" naturally becomes the fundamental requirement of "eating well". In the last few days of the year, it is the peak period for citizens to buy new year's goods. The reporter saw in the food market and supermarket that the crowds were surging and there were many kinds of vegetables and fruits in each market.

The reporter visited and found that the price of vegetables on the market is very different at present. Although most of the prices have increased in the coming New Year, cheap Chinese cabbage and potatoes have remained low. For example, local cabbage costs only 50 cents per catty, radish 1 yuan/catty, and sweet potato is also 1 yuan/catty. However, most citizens are not inclined to buy these cheap dishes, but think that they should eat something good during the Spring Festival.

"It's too shabby to eat cabbage and radish in the New Year. I'd better buy some fine dishes to eat." Ms. Sun, who lives in the Olympic Sports Center, bought 4 yuan/kg of cucumber, 8 yuan/kg of water bamboo, 7 yuan/kg of peas and 10 yuan/kg of Flammulina velutipes yesterday. Although she only spent thirty or forty yuan on a few vegetables, she felt that this was the way to celebrate the New Year.

Cabbage and potatoes, which used to be eaten when the family was poor, are now going to eat some good dishes. "I bought peas, bitter chrysanthemum and celery today." Mr. Gu, a citizen who lives near Jiangjiayuan, also thinks that we should eat some "expensive" dishes during the New Year.

Market visit: "expensive" dishes are mostly out-of-season dishes.

The reporter walked around the market and found that many expensive dishes were actually out of season. For example, cucumbers in summer season generally sell for 2 yuan/kg in summer, and are basically sold in 4 yuan/kg in winter. Recently, the price of green pepper has soared to 7 yuan a catty, which is also a seasonal dish in summer. It costs 3 yuan a catty on weekdays, not to mention beans such as cowpeas, peas, green beans and Dutch beans. At present, the general price ranges from 5 yuan/kg to 10 yuan/kg, which is not expensive among vegetables. But in fact, beans and vegetables are seasonal vegetables in summer, and the prices are not high this season. Even the favorite dish of Nanjing people, Artemisia selengensis, is actually not a seasonal dish. At present, the price in the market is generally 4-5 yuan/kg, and the wild ones are sold to 6 yuan/kg. Bitter gourd, eggplant, leek, lettuce ... The reporter saw in the market that most dishes are actually not seasonal.

Lu Yunlong, manager of agricultural and sideline products logistics center in Cai Zhong, Nanjing, told reporters that when he first started this business more than ten years ago, there were only a few kinds of vegetables in the winter market in Nanjing, and there were a lot of pickled vegetables among the citizens, and some people were just sacks at home. There are so many varieties on the market now. If you calculate carefully, almost 70% is not in season.

"To say anti-season food, in fact, it is not good to generalize. Dishes such as white gourd and cowpea are actually seasonal dishes produced in Hainan, Guangxi and other producing areas, although they are anti-season dishes in our view. The other is greenhouse vegetables, which artificially create a natural environment different from the external environment for planting; In addition, there is another kind that is harvested in the current season and has been kept in the cold storage so far, such as potatoes and garlic. "

"It's much more expensive." Mr. Lu told reporters that compared with seasonal vegetables, the price of anti-season vegetables is indeed more expensive. "For example, the net cost of vegetables shipped from Hainan will increase by 4 cents per catty, while vegetables in vegetable greenhouses need manual maintenance, and the price is definitely higher than that in the open air. At present, many high-priced dishes on the market are anti-season dishes. "

Reporter's survey: Young people do not divide the vegetable season.

However, for out-of-season dishes and seasonal dishes, the reporter randomly surveyed more than a dozen people who were buying vegetables, and listed several vegetables such as "spinach, lotus root, green pepper and Artemisia selengensis" to ask about the season. It turns out that most people, especially young people, can hardly tell the season of vegetables.

"Green peppers are available all year round and should not be anti-season dishes." Green pepper is a seasonal dish in summer and autumn. At present, most of them are produced in Hainan and belong to local dishes in other places. )

"Lotus root is not in summer? It must be out of season. " Although the lotus blooms in summer, the lotus root is purchased in autumn and winter. The lotus root is born in water, so it is a seasonal dish. )

"Artemisia argyi is absolutely in season, and I remember that it can be bought every Spring Festival." Artemisia annua is a kind of wild vegetable, and the season is naturally spring, but because Nanjing people love it very much, vegetable farmers now adopt planting methods such as greenhouses to let Artemisia annua go on the market in advance and seize the Spring Festival market. )

"I used to know which dish was in season when I went to the vegetable market. Now I have everything, so it is not clear." Ms. Lu, a citizen born in the 1970s, told reporters that the memory of vegetable season now depends entirely on the memory of childhood. Now there are all kinds of vegetables. It is estimated that when their children grow up, they can't tell the season of vegetables at all.

Reporters searched on Baidu, and netizens asked tens of thousands of questions about the seasonality of vegetables or fruits. Some of them asked about the seasonal difference between vegetables and fruits, while others asked whether it was healthy to eat vegetables out of season.

Expert advice: it is best to eat local dishes in the season.

"I don't advocate eating vegetables in season. Chinese medicine pays attention to the best local cuisine in the season. " Wang Changsong, chief physician of Chinese medicine department of Zhong Da Hospital, told the reporter that anyone who has studied Chinese medicine knows that Chinese medicine advocates that diet should not go against the laws of nature. Although no one has confirmed that eating out-of-season food will cause illness, out-of-season food or food shipped from other places is not so good.

"Chinese medicine pays attention to eating at the right time, that is to say, when people are sweating in summer, eating a cold and delicious watermelon suddenly feels refreshing and comfortable. The ancient watermelon is called white tiger soup, which has the effect of clearing away heat and quenching thirst and is very good for the body. But if it is winter, the weather is already cold. If the stomach is still flatulent, it is definitely not suitable for eating watermelon. " Huang Huang of Nanjing University of Chinese Medicine believes that it is hard to say whether the out-of-season dishes are good or not, but what is certain is that people should eat according to their own physique and choose palatable dishes. "It's like having Malantou in winter, but you can't always eat the fragrance and game of spring."

Zhou Mingyuan, deputy secretary-general of Jiangsu Cuisine Association, told reporters that from the perspective of daily eating habits, I don't eat out-of-season vegetables very much, mainly because I am worried that the use of pesticides in greenhouse vegetables may be unhealthy. Nanjing is a city with four distinct seasons, and each season has its own unique seasonal ingredients. Even in winter when there are few ingredients, there are seasonal dishes with unique flavor, such as cress, green vegetables and bean sprouts. As long as the correct cooking method is used, it can be cooked delicious.

Seasonal vegetables throughout the year

Spring (January to March in the lunar calendar)

Vegetables: pepper, green pepper, colored pepper, onion, cauliflower, sweet beans, peas, celery, lettuce, shepherd's purse, rape, spinach, Toona sinensis, bamboo shoots, Malantou, gourd and leek.

Summer (April to June in the lunar calendar)

Vegetables: pepper, loofah, bitter gourd, wax gourd, kidney bean, asparagus, water bamboo, onion, cucumber, bergamot, pumpkin, amaranth, hawthorn, water spinach, asparagus, sweet potato leaves, bamboo shoots, lettuce, tomato, cabbage and eggplant.

Autumn (July to September in the lunar calendar)

Vegetables: okra, water chestnut, lotus root, pepper, chestnut, wax gourd, green beans, sweet potato leaves, beans, yam, Chinese cabbage and lentils.

Winter (October to December of the lunar calendar)

Vegetables: green pepper, cabbage, Chinese cabbage, onion, cauliflower, carrot, radish, sweet bean, celery, spinach, mustard, sunflower and lettuce.

"characteristics" of food

The nature of food refers to the "four natures", that is, cold, hot, warm and cool. In addition, some foods have a peaceful diet, which is called blandness. Foods that can relieve or eliminate heat syndrome are cold in nature; Foods that can relieve and eliminate cold syndrome are warm. It is generally believed that cold food has the functions of clearing away heat, purging fire and detoxifying, and is often used for fever. Most warm foods have the functions of warming middle warmer, supporting yang and dispelling cold, and are often used for cold syndrome. Vegetarian dishes have the functions of strengthening the spleen, appetizing and nourishing the body.

Cold foods include bitter gourd, tomato, wild Zizania latifolia, water chestnut, lily, lotus root, bamboo shoot, arrowhead, konjac, water spinach, dandelion, houttuynia cordata, purslane, bracken, bitter herb, shepherd's purse, Toona sinensis, water shield and houttuynia cordata.

Warm foods are: ginger, onion and coriander, which are suitable for colds, fever, aversion to cold, runny nose and headache; Dried ginger and black tea suitable for abdominal pain, vomiting and hot drinks; Suitable for chilli and wine with symptoms such as chills in limbs, chills and rheumatic joint pain.

Sexual foods include: rice, soybeans, black sesame, peanuts, potatoes, Chinese cabbage, cabbage, carrots, onions, black fungus, eggs, carp, crucian carp, loach, yellow croaker and pomfret. In addition, the milk we drink in our daily life is also a flat food.

Cold foods include buckwheat, corn, white radish, wax gourd, mushrooms, celery, lettuce, rape, oranges, apples and so on.

Cold foods include: millet, mung beans, kelp, mung bean sprouts, bitter gourd, tomatoes, cucumbers, bananas, watermelons, melons and so on.

comprehensive

? -Na ~ it's all patchwork. Use it if you like! ! ! ! ?

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