The pattern of transporting food from the south to the north forms the Beijing market. 1Accord 3. Winter food comes from the south.

In the past, radish and cabbage became the protagonist on the table of northern residents in winter. Nowadays, there are a wide variety of vegetables on the market. Where do these vegetables come from?

Xinfadi market is the barometer of Beijing vegetable market. Liu Tong, head of the market statistics office, said that about 1x3 of winter vegetables in the newly developed areas are supplied by provinces south of the Yangtze River, mainly in East China, South China and Southwest China. For example, lettuce, except for the northern greenhouse, is mainly supplied by Fujian; beans are supplied by Sichuan and Hainan; and sharp and persimmon peppers are mainly supplied by Guangdong and Hainan.

Liu Tong said that agricultural products have been included in the category of large circulation since 2000. In the newly developed area, the listing and delisting of each variety form a circular chain connected from beginning to end. For example, cauliflower, solid cauliflower on the market now comes from Yunnan and Zhejiang, where cauliflower has been available until around April. Cauliflower from Jiangsu and Shandong has been on the market since April and can last until June. In July, cauliflower was supplied to Zhangjiakou and Chengde in Hebei, Chifeng in Inner Mongolia and Datong in Shanxi, until the end of September. After October, the supply of cauliflower became near the suburbs of Beijing. In November, the supply of cauliflower moved southward to Henan and Hubei. After December, the supply has returned to Zhejiang, Yunnan and other provinces. In winter, in the newly developed areas, the daily supply of cauliflower is about 800 tons, which lasts about 120 days.

Mu Yueying, a professor at the School of Economics and Management of China Agricultural University, said that the formation of the pattern of transporting food from the south to the north is the result of many factors. First of all, the development of transportation provides transport conditions for the transportation of food from the south to the north; secondly, with the change in the production layout of crops in the south, vegetables have more comparative advantages over rice, which has developed rapidly in the southern provinces in recent years; third, the improvement of residents' living standards has formed a rigid demand for vegetables, but also provides a broad market for the transportation of food from the south to the north.

Large market and large circulation, southern dishes will not be too expensive

Qiu Huanguang, a professor at the School of Agriculture and Rural Development of Renmin University of China, pointed out that due to the characteristics of seasonal production and difficult storage, the price of vegetables changes periodically, and vegetable prices are relatively high in winter. the main reason is the increase in production and transportation costs.

Liu Tong believes that the cost of transporting vegetables from the south to the north is mainly composed of two aspects: one is the transportation cost, and the other is the freezing cost. Due to long-distance transportation, many vegetables cannot be loaded directly after harvest. They need to be refrigerated in the freezer for two days, and then transported northward in refrigerated vehicles after the temperature of cauliflower drops.

"in a big market and large circulation environment, even if the food is transported from the south to the north, the price will not be ridiculously expensive." Liu Tong said that the current weighted average price of vegetables in newly developed areas is 2.45 yuan / kg, which is lower than that of the same period last year. Due to the late Spring Festival this year, the peak of vegetable prices comes relatively late. generally speaking, from the 15th day of the 12th lunar month, vegetable prices will have an upward trend every year until around the Spring Festival, the peak period, the vegetable weight price can rise to about 3.5 yuan / kg. "this year, pepper varieties are affected by low temperatures in southern suppliers, and their prices fluctuate obviously." Liu Tong said.

The problem of agricultural residues is well controlled on the whole, and vegetables in the formal market can be safely eaten.

In recent years, vegetable safety incidents such as "poisonous ginger" and "poisoned cowpea" have been frequently exposed. People are worried about whether the vegetables on the market are safe.

Zhu Yi, an associate professor at the School of Food Science and Nutrition Engineering at China Agricultural University, said: "the biggest problem in vegetable safety is pesticide residues. In recent years, the problem of agricultural residues has been well controlled, and the rate of exceeding the standard has been declining. In the regular farmers' markets in big cities, within the scope of market supervision, the vegetables bought can basically be safely eaten. "

Zhu Yi believes that now the concerns about the quality and safety of some agricultural products have sometimes been magnified. For example, pesticide residues in vegetables, now the target reserved 100 times the safe space, sometimes heard that the pesticide residue of a certain vegetable exceeded twice the standard, sounds terrible, but it is still within the safe range. Compared with the agricultural residues of vegetables, what needs more attention is the extensive use of pesticides at present. At present, only 20% of the pesticides in China play a role, and 80% of the pesticides are scattered in the air, soil and water. These pesticides are returned to the human body through biological circulation, and the harm to the human body is far greater than that caused by agricultural residues of vegetables.

Zhu Yi said that there is a consumption misunderstanding that vegetables with wormeyes are vegetables that are not sprayed with pesticides. In fact, if there are larger wormholes, it means that vegetables use more and stronger pesticides. In addition, don't be overly superstitious about field picking or farm vegetable picking. In addition, vegetables growing up in communities or parks are polluted by air pollution and car exhaust emissions, and the content of toxic elements is very high.