Where is the origin of oranges?

Citrus is a kind of fruit rich in a variety of nutrients, and China is one of the places of origin. According to textual research, oranges, oranges, oranges and other citrus fruits were not introduced to Portugal from China until 1471 and to the United States in 1665. So, where is the producing area of citrus?

1. Citrus producing area

Chinese oranges are distributed between 16 °and 37 °N, with an altitude of up to 2600 m (Batang, Sichuan), starting from Sanya City in Hainan Province in the south, Shaanxi, Gansu and Henan in the north, Taiwan Province in the east and the Yarlung Zangbo River valley in Xizang in the west. However, the economic cultivation areas of citrus in China are mainly concentrated in 20 °~ 33 °N latitude, below 700-1000 m above sea level. Citrus is produced in 19 provinces (municipalities and autonomous regions), including Taiwan Province. Citrus is mainly produced in 10 provinces (cities and regions), including Zhejiang, Fujian, Hunan, Sichuan, Guangxi, Hubei, Guangdong, Jiangxi, Chongqing and Taiwan, followed by Shanghai, Guizhou, Yunnan, Jiangsu and other provinces. Shaanxi, Henan, Hainan, Anhui and Gansu provinces also grow. There are 985 citrus growing counties (cities and districts) in the country. The citrus in the world is mainly distributed in the area south of latitude 35 °N, which is warm and humid, and the area with large water body warming can be pushed northward to latitude 45 °N.

There are 135countries in the world that produce citrus, with an annual output of 102.822 million tons, covering an area of 107.3 million mu, ranking first among all fruits, Brazil with 24.2526 million tons, the United States with 16.3352 million tons, and China with the third with 10.78 million tons, followed by Mexico, Spain, Iran, India, Italy and other countries.

II. Nutritional value of citrus

(1) Orange is rich in vitamin C and citric acid, the former has the role of cosmetology, while the latter has the effect of relieving fatigue.

(2) the thin peel on the inside of the orange contains dietary fiber and pectin, which can promote defecation and lower cholesterol.

(3) hesperidin can strengthen the toughness of capillaries, lower blood pressure and dilate the coronary artery of the heart, so orange is a food to prevent coronary heart disease and arteriosclerosis.

Oranges are delicious, but don't eat too much. In addition, citrus and radish, milk and other food, easy to induce some uncomfortable symptoms.