Dip winter jujube, a specialty of Zhan Hua District, Binzhou City, Shandong Province, is a national geographical indication product of China. [1] The shape of the dipped winter jujube is flat or round, the fruit surface is smooth, and when ripe, it shows dot red, slice red, and full red, and the color of the coloring surface is ochre red. The skin of the mature dipped winter dates is thin and crispy, the core is small, the taste is sweet and fragrant, sweet and sour, and the food is slag-free. The perennial planting area is stable at about 500,000 mu. [2] On August 6, 2002, the former General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China approved the implementation of regional product protection for "dipped winter jujube". [1] On 20 July 2020, the Council of the European Union included the jujube in the second batch of 175 Chinese geographical indications. In April 2021, it was selected into the first batch of national famous and excellent new agricultural products in 2021.
Product features
Quality characteristics dip winter jujube ripening period is late, ripening in mid-to-late October, shaped like an apple, known as "small apple". The average single fruit weighs about 20 grams; the color is bright and ochre, the taste is excellent, the skin is thin and crisp, the tender and juicy, sweet and fragrant, the nutrition is rich, and the edible rate is 93.8%. Although the dipped winter jujube has strong adaptability, it prefers loam or sandy loam soil with more fertile soil and high organic matter content, and the dipped winter jujube tree canopy growing on such soil is tall, the root system is deep and wide, the yield is high, and the quality is good. Like other jujube trees, it belongs to temperate deciduous fruit trees, and its growth and development require higher temperatures, so it germinates late and leaves fall earlier. Winter dates are mainly eaten fresh, their own texture is crispy and thin, very easy to break, light freezing can extend its freshness for a period of time, but not easy for too long.
Nutritional value by the Beijing Institute of Nutrient Source analysis and testing, dipped winter jujube contains 19 kinds of amino acids and A, B, C, P and other vitamins needed by the human body, containing soluble solids 34%-38%, vitamin C352 mg / 100 grams. Compared with other fruits, it is 70 times that of apples and 140 times that of pears, and its nutritional value is "the crown of hundred fruits", which is known as "the king of hundred fruits" and "living vitamin pills". Bowyer, director of the Institute of Life Sciences at the College of Horticulture and Agriculture, University of Oregon, usa, and Professor Fukigomi tasted it and called it "the world's first fruit". After scientific analysis, winter jujube contains 19 kinds of essential amino acids such as aspartic acid, threonine, serine, etc., with a total content of 0.985 mg/100 g, containing 1.65% protein, 2.3% dietary fiber, 17.3% total sugar, 0.26% total flavonoids, niacin 0.87 mg/100 g, carotene 1.1 mg/kg, vitamin B10.1 mg/kg, vitamin B22.2 mg/kg, vitamin C content of 1079.1 mg/kg, Live vitamin pills". In addition, it also contains more vitamins A and E, potassium, sodium, iron, copper and other trace elements, and has the reputation of the king of hundred fruits with nutritional value.
Identification methods for selecting authentic dipped winter dates: first, from the difference in the time of listing, authentic dipped winter dates were only matured and listed at the end of September and early October; second, from the appearance of the jujube fruit, authentic and mature dipped winter jujube fruits are shaped ZhouZheng, round or flat, shaped like small apples, the average weight of a single fruit is 14.6 grams, the fruit surface is bright, the color is bright and thick, the semi-red or all-red fruit is ochre red; third, from the taste difference, authentic, mature dipped winter dates, the taste of thin skin, crispy and small, the flesh is tender and juicy, and the food is slag-free Sweet and fragrant, sweet and sour.
