Blueberry (Vaccinium spp.) belongs to Ericaceae. Blueberry is a small berry, the fruit is blue, nearly round, the flesh is fine, the seeds are very small, the sweetness and sourness are moderate, and it has a fragrant and pleasant aroma. It can be eaten fresh and can also be used as raw materials for food, beverage and medicine. Blueberry fruit is rich in various nutrients commonly found in fruits, as well as antioxidants and bacterial growth inhibitors such as anthocyanins and flavonoids. It is a fruit with high amino acids, high zinc, high iron, high copper and high vitamins. It has good nutritional and health care functions, including enhancing eyesight, eliminating eye fatigue, preventing brain nerve aging, resisting cancer, softening blood vessels and enhancing human immunity. Its nutritional value is much higher than that of apples, grapes and oranges, and it can be called "the world"

Blueberry fruit not only has high nutritional value, but also contains a lot of substances beneficial to human health, including antioxidants (VA, Vc, VE), capric acid (vb), antibacterial components and rich dietary fiber, etc. Generally speaking, it has the following health care functions:

(1) VMA (anthocyanin pigment) of blueberry fruit has a good health care effect on eyes, which can reduce eye fatigue and improve night vision.

⑵ It has the functions of protecting capillaries and resisting oxidation.

(3) delay the aging of brain nerve and enhance memory.

(4) It has a good effect of eliminating inflammation in vivo, especially for urinary tract infection and chronic nephritis.

(5) It has anticancer effect.

The retail price of fresh fruit is very high in the world. The lowest retail price in the United States is about $3/pound, and that in Japan is as high as $ 4-5/kg. Fresh blueberries are usually packaged and sold in units of 125g. After harvesting, the packaging, storage, transportation, marketing and shelf life all need to be carried out at about ℃, and the preservation period is about 3 months. It is predicted that the export price of fresh blueberry produced in China is above 5 USD/kg. Blueberries that can't be sold as fresh fruits in time can be quickly frozen into frozen fruits, and the export price is expected to be above $2.5/kg. Frozen fruit can be processed into preserved fruit, dried fruit, jam, beverage, etc., as well as additives for ice cream and dairy products.