Winter jujube generally matures naturally in the solar calendar 10-10/month. Because the weather in the north entered the cold earlier, it was named "winter jujube". Dongzao (also known as Yanlaihong, Apple Jujube, Rock Sugar Jujube, Huanghua Dongzao, Miaoshang Dongzao and Zhanhua Dongzao) is a high-quality late-maturing fresh food species in northern Shandong.

Winter jujube belongs to Rhamnaceae, Zizyphus. It is an excellent late-maturing and fresh-eating variety of spinless jujube. Distributed in Shanxi, Hebei, Shandong and other places. The biggest feature of winter jujube is its extremely high vitamin C content, which is as high as 380 ~ 600 mg per 100 g pulp.

Dongzao is a cultivated variety of jujube tree. Originated in Xiawa Town, Zhanhua District, Binzhou City, Shandong Province, it is an excellent late-maturing and fresh-eating jujube variety without thorns, and it is also recognized as the best fresh-eating jujube variety. The average fruit weight is 17.5g, and the maximum fruit weight can reach 25g, which looks like an apple and is called "little apple". The skin is red and bright, thin and crisp, sweet and fragrant, rich in nutrition, and the edible rate is 95%.

Extended data

nutritional ingredient

Vitamin c content is high. Fresh jujube has the reputation of "natural vitamin C pill", and the vitamin C content in fresh jujube is as high as 243 mg per 100 g, which is about 4 times that of kiwifruit and more than 8 times that of citrus. It is particularly worth mentioning that the vitamin C content of Zizyphus jujuba is as high as 900 mg/100 g, which is 2~3 times that of other fresh dates.

Rich in minerals, such as potassium, phosphorus, calcium, magnesium, iron and so on. Contains a variety of functional components, such as malic acid, catechuic acid and tartaric acid, which helps to inhibit the growth and reproduction of cancer cells;

Cyclic adenosine monophosphate has the functions of regulating immunity, inhibiting asthma and preventing cardiovascular diseases; Flavonoids such as rutin, swertia flavescens and anthocyanins have the effects of scavenging free radicals, delaying aging, lowering blood pressure and reducing blood lipid. However, the sugar content of fresh dates is as high as 20%~30%, and the glycemic index is also high. Diabetic patients should eat less, and the daily consumption should be one handful.

References:

People's Daily Online-People's Health Online-The fresh jujube family has its own specialties: pear jujube is full and juicy, winter jujube is sweet and sour, and green jujube is thick and small.

References:

Baidu Encyclopedia-Dongzao