Can anti-season vegetables be eaten in the end? How to choose?

“Eating from time to time” is an old saying. It is about eating something in season, seasonally, and what time it is eaten. However, nowadays, eating watermelon in the winter and eating radish in the summer, we are not even sure what seasonal dishes are. Anyway, what fruits and vegetables can be eaten throughout the year is due to the popularity of anti-season vegetables. Can anti-season vegetables be eaten in the end? How to pick out off-season vegetables is safer? With regard to the issues that these readers are very concerned about, the reporter found a special expert to seek answers.

More than half of the vegetable market is counter-season vegetables

Chinese medicine practitioners pay attention to health care, and Liu Youzhang, professor at the First Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine, believes that: “The Taoist nature is natural, the solar term is healthy, and plants and animals are subject to climate change. Health and longevity can only be achieved by complying with health at 4 o’clock. It is because of the influence of heaven and earth that we should be sick. We should of course follow the diet from time to time without eating, and we must not violate the four-year health regime because we are pursuing our desire to lash out our stomachs."

At present, what proportion of off-season vegetables on the market account for? According to a survey by the reporter, it has now entered the late autumn. The vegetable market still has vegetables such as cucumbers, tomatoes, beans, eggplant, bitter gourd, chili peppers, and other summer vegetables. There are seasonal spring vegetables such as leeks and spinach. Counting a few more than half of the vegetables actually turned out to be counter-season vegetables.

Obviously, the anti-season vegetables are very common in the market. This is not only because the vegetable growers have to increase production and increase their income, but also because of the public's demand for diversification of vegetables. For example, red onion has a large area of ​​planting in Guangzhou, which is characterized by high yield, strong onion and high quality, and is an important seasoning vegetable variety in South China. In Guangzhou, the normal cultivation time is from September to March of the following year, and from May to September each year, it is hot and rainy, and the open-air production of red onions is greatly affected. At this time, the production of red in greenhouses is counter-season. The onion was very popular.

Slightly poorer taste, "hard injury" of anti-season vegetables

Attentive consumers will find that although the off-season vegetables are selling well, they taste slightly worse. How is this going? In response, Jiang Zhuoqin, professor of nutrition at Sun Yat-sen University’s School of Public Health, explained in an interview with reporters that the greenhouse’s high-temperature and high-humidity environment accelerated the growth of vegetables, making the vegetable growth period shorter than the seasonal vegetables grown in the open air, resulting in quality and taste Yu seasonal vegetables.

In addition, due to the short growing season, the off-season vegetables undergo a ripening and other treatments, and their own taste will become worse. For instance, the greenhouse tomatoes sold on the market are very thick and the skin bites down and they are not ripe yet.

Anti-season vegetables to prevent excessive pesticide residues

In addition to bad taste, there is another flaw in the off-season vegetables. Compared with the seasonal vegetables grown in the open season, the vegetables grown in the unseasonal greenhouses, due to the high temperature and high humidity in the greenhouse, combined with the high planting density, the pests and diseases caused by the unseasonal vegetables in greenhouses are more serious. For counter-season vegetables, the new book “Towards Balance—Looking for Your Own Health Thinking”, a master's book by the United States’s Clayton’s Department of Bio-Nutrition, considers that planting off-season vegetables in large areas may cause excessive levels of pesticides, and thus Be cautious.

Yang Xi'an, professor of Department of Veterinary Science at the South China Agricultural University's Department of Horticulture, pointed out that severe weather such as typhoons and heavy rains frequently occurred in the summer in the south. Vegetable production was very difficult and the quality of vegetables was low. In the northern mountainous regions of northern Guangdong or in plain areas at different altitudes, the use of anti-season and pollution-free vegetable cultivation techniques can reduce the use of pesticides and chemical fertilizers and control the nitrate content of vegetables.

Therefore, Yang Sixi believes that it is more necessary to apply some techniques to help produce pollution-free off-season vegetables. In general, pollution-free vegetables should contain the following three conditions:

(1) The pesticide residue does not exceed the standard. The pollution-free vegetables do not contain banned highly toxic pesticides, and other pesticide residues do not exceed the allowable standards.

(2) The nitrate content does not exceed the standard. Nitrate content in edible vegetables does not exceed the standard allowable amount, generally controlled below 432 ppm.

(3) The "three wastes" and other harmful substances do not exceed the standard, no pollution vegetable must avoid the harm caused by environmental pollution, the "three wastes" of the food vegetables and the harmful substances of pathogenic microorganisms do not exceed the standard allowable amount.

How to pick out anti-season vegetables safely?

If there are conditions, readers are advised to use seasonal vegetables as much as possible. If it is necessary to eat vegetables that are out of season, how can it be safer to choose?

Experts suggest that consumers should choose vegetable products of normal size, shape, and color. Do not blindly pick large or bright colors. This may be due to irregular use of medicines.

Also smell the smell. Most vegetables have aromas, sweet aromas, sweet and sour notes, and vegetables with other odors are not recommended.

Look at the form. Most vegetables have a fresh and normal state, and some vegetables grow into malformations due to the artificial use of hormones.

The last thing to remind is that vegetables with insect eyes are definitely not equivalent to pollution-free vegetables. Sometimes the pesticide residues in vegetables with insect eyes may be higher.

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