Lingwu long jujube

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Lingwu Changzao is an excellent fresh food treasure with local characteristics after many years of natural screening. It has a cultivation history of 500 years. The fruit is bright, fleshy, crisp, sweet and sour, rich in various minerals and vitamins, especially the highest content of vitamin C, more than 10 times that of Chinese kiwifruit, known as the "king of the fruit."

Lingwu Changzao is a unique variety in Lingwu City of Ningxia Hui Autonomous Region. It has a long history of cultivation and excellent varieties. It produces fresh and delicious fruit, crispy texture, juicy juice, white and green flesh, high edible and nutritional value. Approved as a national geographical indication product of China. Contains a variety of nutrients that are beneficial to the human body. Contains a large amount of vitamin P, which has the function of keeping capillaries smooth and preventing the fragility of blood vessel walls. It has curative effect on high blood pressure, atherosclerosis and other diseases, is rich in nutrients, has wide application, and is beneficial to human health. It is made into jujube with fresh dates. Its sweet and unique taste is a gift for gifts. It is a nutritious tonic that combines dried jujube with white fungus and oysters. [Overview of Lingwu City] Lingwu City (Hanyu Pinyin: Líng Wǔ Shì; English: Lingwu), the ancient name of Lingzhou. A county-level city under the custody of Yinchuan City, Ningxia Hui Autonomous Region, China. It is located in the middle of Ningxia Hui Autonomous Region and east of the Yellow River. The total area is 4539 square kilometers. The city governs 6 towns and 2 townships. The Yellow River flows from the south to the north from the west side of the city. The salt ringing and yellowing irrigation project passes through the southern mountainous area. It belongs to the sub-temperate climate, with drought and little rain. The annual precipitation is 212.6 mm, and the sunshine is sufficient. The annual average temperature is 8.8 °C. Coal, oil, natural gas and other resources are abundant. The Dagu Railway runs from the east to the west through the central part of the city, 307 and 211 national highways, and the Yingu first-class highway is in the shape of “Chuan”. Yinchuanhe Dongfei Airport is located in the territory. Lingwu is one of the birthplaces of the Chinese nation. A large sauropod dinosaur was active in the Lingwu area in the Mesozoic Jurassic about 160 million years ago. As early as 30,000 years ago in the late Paleolithic period, ancient humans flourished in the Shuidonggou area. After the Warring States Qin Huiwen Wang was in the fifth year (before 320 years), his power had reached the present Lingwu City. After Qin unified the six countries, it belonged to the jurisdiction of Qinbeidi County. At the beginning of the Western Han Dynasty, it belonged to Fuping County, Beidi County. In the four years of the Western Han Dynasty (191 years ago), Lingzhou County was established, and the name of Lingwu County was found in the annals. In the second year of Xiaochang in the Northern Wei Dynasty (526 years), the name of "Lingzhou" was first seen. At the time of the Sui and Tang Dynasties, Lingzhou had become a military town in the northwest. Emperor Taizong once went to Lingzhou to give Shishi Leshi, and Prince Li Heng was enthroned in Lingwu. In the five years of the Northern Song Dynasty (1002), the party leader Li Jiqian took Lingzhou as the capital and called it “Xiping House”, making it an important political, economic, military and cultural center in Xixia. Yuan Fu is Lingzhou. Ming Ming set up Lingzhou Shouyu thousand households, three times moved, this Lingwu ancient city was built in Xuande three years (1428). Qing is still Lingzhou. In the 2nd year of the Republic of China (1913), Lingzhou was changed to Lingwu County, belonging to Ningxia Province. On September 23, 1949, Lingwu County was liberated. In 1954, Gan Ning and the province belonged to Hedong Hui Autonomous Region of Gansu Province (Wuzhong Hui Autonomous Prefecture). In October 1958, after the establishment of the Ningxia Hui Autonomous Region, it was under the jurisdiction of the autonomous region. In May 1996, the State Council approved Lingwu to withdraw from the county to set up a city. Lingwu resources are enriched. Coal, natural gas, petroleum and other resources are abundant, especially coal resources are second to none in Ningxia. The proven coal reserves are 27.3 billion tons, which is the sum of the coal reserves of the three northeastern provinces and one of the country's 1.3 billion tons of coal production bases. The agricultural production conditions are unique, rich in rice, wheat, corn, long dates, etc. It is an important commodity grain production base and a famous fruit town in the country. The industrial agglomeration has obvious advantages in development, and has formed advantageous industries such as coal chemical industry, cashmere processing, renewable resources, long jujube and grain processing. Lingwu has rich tourism resources and numerous historical sites. The well-known Shuidonggou is the earliest discovered ancient human cultural site in the Paleolithic Age in China, and is known as the “the birthplace of Chinese prehistoric archaeology”. The Lingwu dinosaur fossil site dating back 160 million years ago is a dinosaur fossil that has been found to have a large area, concentrated distribution, intact preservation and unspoiled surrounding environment. It is one of the largest species of the known sauropod dinosaurs. . There are cultural sites such as the ancient tombs of the Han Dynasty and the Ming Great Wall. Built in the Yuan Dynasty, the Zhenhe Tower (commonly known as the East Tower) is 43.6 meters high and is an octagonal-shaped, brick-wood structure. It is a key cultural relics protection unit in the autonomous region. Xixia Film City and Jinshui Tourist Area are newly developed tourist attractions and resorts in the autonomous region. Lingwu is a national-level Ningdong energy and chemical base, a national urban minerals demonstration, a national high-quality grain production and processing base, a national high-quality fruit (Lingwu long jujube) base, a national halal mutton production and processing base, and an international fine cashmere production and processing base. Lingwu was named by the State Forestry Department of China as “the hometown of Chinese Lingwu Changzao”.

Lingwu long jujube quality technical requirements (a) varieties. Ningxia long jujube excellent system. (2) Cultivation management. 1. Nursery: The nursery land chooses the flat terrain and the irrigation and drainage of the land. It is suitable for sandy loam and light loam. The rootstock seeds are selected from jujube kernels or jujube kernels. Select the annual jujube head of the mature age, strong growth, high yield, high quality, no pests and diseases, and make the scion for grafting. 2. Building a garden: Select a plot with deep soil layers, fertile soil, irrigation and drainage, and convenient transportation conditions. Sandy soil or light loam with high groundwater content of 1.5m or less, mature soil layer of 30cm or more, pH of 7.5 to 8.5, and high organic matter content. 3. Plastic trim: a spindle shape, a small crown shape and a happy tree shape. The winter shears are mainly sparse, and the short stems are used to cultivate the backbone branches. Summer shears mainly include buds, topping, pulling and thinning. The planting density does not exceed 110 plants per mu. 4. Fertilizer and water management: balanced fertilization, before and after promotion. Based on organic fertilizer, the fertilizer is applied in proportion to the time. Pay attention to drought prevention in the early stage, timely irrigation, and control irrigation after mid-August. 5. Flower and fruit management: take the topping, flowering foliar spray, the result of prolonged tree opening (circumcision), and the flowering period to improve the fruit setting rate. Adjust the tree potential, reasonable load, and improve fruit quality. (3) Fruit harvesting, grading and storage. 1. Fruit harvesting: Harvesting on sunny days after mid-September is appropriate. Pick lightly when picking to prevent damage. 2. Storage and preservation: Before storage, use preservatives in accordance with national regulations, and store them in fresh-keeping bags. (4) Quality characteristics. 1. Sensory characteristics: fresh jujube fruit is long cylindrical, slightly flat, longitudinal diameter ≥ 2.8cm, transverse diameter ≥ 2.0cm, single fruit weight ≥ 9g. The stem is deep and wide, and the shoulder is flat. The peel is purple-red and the fruit is reddish brown and not obvious. The skin is thin, the flesh is green and white, dense and crisp, juicy, sweet and sour. 2. Physical and chemical indicators: fruit edible rate ≥ 90%, soluble solid content ≥ 25%, total acid ≥ 0.4, vitamin C per 100g fresh jujube content ≥ 345mg.

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Producers within the scope of protection of Lingwu Changzao's geographical indication products may apply to the Lingwu Municipal Bureau of Quality and Technical Supervision of Ningxia Hui Autonomous Region for the use of the “Special Mark for Geographical Indication Products”, which shall be approved by the General Administration of Quality Supervision, Inspection and Quarantine.