Where does Chenggu tangerine come from?

Chenggu tangerine is a geographical indication certification trademark. Chenggu tangerine is a geographical indication product of agricultural products.

Chenggu has a long history of citrus cultivation, which has a history of more than 2,000 years. Chenggu citrus is sweet and sour, with unique flavor and excellent quality, which is favored by northern consumers mainly in northwest China. Vigorously developing citrus industry has effectively promoted the formation of dominant industries (17 citrus) and increased farmers' income. The total area of citrus in the county is more than 200,000 mu, 16 townships and 209 administrative villages, 55,000 households149,000 farmers are engaged in citrus cultivation, 100 mu of citrus has obtained the national green food certification, and 2,000 mu of citrus has passed the national good agricultural standard certification, thus cultivating citrus agricultural industrialization and Huayuan, Zhengjiapo and Sanjia two provinces and cities.

Every 100g edible part of Chenggu Citrus contains 0.05mg riboflavin, 0.3mg nicotinic acid, 0.6mg ascorbic acid (vitamin C)/kloc-0, 0.9g protein, 0.01g fat, 0.2g sugar 12g crude fiber and 0.4g inorganic salt. The content of carotene (provitamin A) in citrus is second only to apricot and higher than other fruits. Citrus also contains a variety of vitamins, in addition, it also contains elements such as potassium, magnesium, sulfur, sodium, chlorine and silicon.

Chenggu County in Hanzhong has been known as "Gong Ju" and "Hometown of Oranges" since ancient times, and it is the only place in the world where sweet and sour oranges are gifted. Among them, Zhang Qian Tangerine, Shengxian Tangerine and Hanjiang Tangerine have obtained the national green food registration certification. Chenggu orange has unique flavor, sweet and sour taste and early maturity. Autumn is the season when oranges are ripe, and the oranges bought at this time are the freshest; You can also go to the orange orchard in Chenggu to pick oranges, which is cheap and delicious.

Specific mass

Bright color, smooth fruit surface, rich flavor, moderate sweetness and sourness, crisp and tender meat, refreshing fragrance and good slag melting.

Cultural allusions

Citrus is a traditional characteristic industry in Chenggu, with a long cultivation history of more than 2000 years. Chenggu Citrus is well-known in northern China for its early maturity, good coloring, sweet and sour taste and rich fruit flavor.

territorial scope

The producing areas of Chenggu tangerine are 14 towns in Chenggu County, Hanzhong City, Shaanxi Province, including Juyuan Town, Yuan Gong Town, Wen Chuan Town, Laozhuang Town, Baoshan Town, Wulong Township, Longtou Town, Cuijiashan Town, Wang Bo Town, Shaheying Town, Liulin Town, Sanhe Township, Dongjiaying Township and Shangyuanguan Town, with a total production area of/kloc-0. The area is located at 107 03 '- 107 30' east longitude and 32 45'-33 40' north latitude, with an average elevation of 800 meters. The county is bordered by Yangxian County in the east, Hantai and Liuba County in the west, and Nanzheng and Xixiang County in the south. The main citrus producing areas in the county start from Baoshan Town in the east, Wen Chuan Town in the west, Orange Garden Town in the north and Dongjiaying Township in the south.

Natural ecological environment and human and historical factors

(1) Soil landform: Chenggu County is high in the north and low in the south. The territory is divided into three major geological and geomorphological areas: south, middle and north, with Qinba Mountain area and hilly area in the south and Pingba area in the middle. Cultivable soil is mainly loam, with deep soil layer, organic matter content above 65438 0.5%, rich in phosphorus and potassium, pH value between 5.5 and 7.2, low groundwater level and good water and fertilizer conservation ability. The contents of cadmium, arsenic and other metals in soil are lower than the requirements of green citrus production index.

(2) Hydrological situation: Chenggu County has an excellent ecological environment, with a forest coverage rate of 54%, fresh air and clean water sources. Hanjiang River, the largest tributary of the Yangtze River, runs through the county from east to west and is rich in water resources. The main irrigation water source is water river. There are no large industrial enterprises in the county, and there are few small and medium-sized industrial and mining enterprises. The quality of irrigation water is good and pollution-free, which provides good irrigation conditions for the production of Chenggu tangerine.

(3) Climate: Chenggu County has a humid monsoon climate in the north subtropical zone. The annual average temperature is 14.3- 15℃, the effective accumulated temperature is more than 4800 ≥ 10℃, the annual rainfall is 800- 1000 mm, the relative humidity is about 74%, and the annual sunshine hours are more than 1500 hours.

(4) Human history: Chenggu is the hometown of Zhang Qian, a famous diplomat in the Western Han Dynasty and a pioneer of the Silk Road, with profound cultural and historical connotations. Citrus has always been a traditional characteristic industry in Chenggu County, with a long history of cultivation, which can be traced back to the Han Dynasty more than 2,000 years ago. It is also described in Historical Records and Biography of Huo Zhi that there are thousands of trees and oranges in Jiangling, Shu Han, and this person is the same as thousands of households. It can be seen that in the Han Dynasty, citrus was planted in the Hanjiang River Basin in southern Shaanxi, and it was valued by the ancients. Another example is Ouyang Xiu's Geography of the New Tang Dynasty: "Xingyuan House is out of Gong Ju". Xingyuan mansion includes Chenggu and its west, which shows that the citrus quality in Chenggu and other places in Hanzhong was excellent at that time. In the fifty-sixth year of Emperor Kangxi of Qing Dynasty (17 17), "Tangerine is superior to other cities" in Chenggu County (Kangxi's Annals of Chenggu and Rebuilding the Annals of Hanzhong Prefecture), and in the thirty-first year of Guangxu (1905), "Danju Huang Gan" in Chenggu County was produced near the ancient mouth of the sage in the north of the county. The above records fully prove that Chenggu citrus planting has a long history and excellent quality.

200 1, Chenggu was named "the hometown of citrus in China" by the Ministry of Forestry. In 2002, Miyagawa, Xingjin and Chengmi 02 produced by Chenggu were recognized as "high-quality fruits" by the citrus seedling quality supervision, inspection and testing center of the Ministry of Agriculture, and were awarded "high-quality fruit certificate" and "variety registration certificate". In 2005, at the Beijing International Agricultural Products Fair, Chenggu Citrus was awarded the "Best Selling Product Award". From 2003 to 2007,100000 mu green citrus base successfully passed the certification of green fruit base and product A certification of National Green Food Development Center.

Production technical requirements

(1) Selection of producing area: Choose the place with loose and fertile soil, organic matter content above 1.5g/kg, soil layer above 80cm, loam, sandy loam and light clay, soil pH value of 5.5-7.2, and groundwater level below 1m to build the garden. The environmental conditions of the place of origin shall meet the requirements of Environmental Conditions of the Place of Origin of Pollution-free Food, Forest and Fruit Products (NY50 13—2006).

(2) Variety selection: especially early-maturing varieties: Rinan 1, Tai Po, Shanchuan, Shi Wen, etc. Precocious product

Category: Xingjin, Miyagawa, Yamashita Hiroshi, etc. Mid-late maturity varieties: Chenggu Sugar Orange, Cinnabar Orange, etc.

(3) Production process management: Chenggu tangerine should meet the requirements of Technical Regulations for the Production of Pollution-free Food Citrus (NY/T50 15-2002).

(4) product harvesting and post-harvest treatment: harvesting should be timely, in batches, and double-shearing method should be adopted to avoid fruit damage.

(5) Requirements for production records: During the whole production process of Chenggu tangerine, field production files should be established, comprehensively recorded and properly kept for future reference.

Typical product quality characteristics and product quality and safety regulations

(1) External sensory characteristics: The fruit of Chenggu Tangerine is oblate, dignified in appearance, smooth in surface, moderate in size, bright orange or orange-red, and thin and easy to separate.

(2) Internal quality index: The fruit is fresh, tender and juicy, easy to remove dregs, moderately sweet and sour, and rich in flavor. Soluble solid content 1 1- 12%, total acid content 0.62g/ 100ml, solid-acid ratio 17.4, edible rate over 72%, and Vc content 30.27mg//kloc-0.

(3) Safety requirements: Chenggu tangerine should meet the Hygienic Requirements for Non-pollution Foods and Citrus Fruits (NY50 14-2005).

Packaging identification and other relevant regulations.

After the fruits are graded strictly according to the standard and passed the quality inspection, the packaging label of Chenggu Tangerine will be used uniformly, and the credit card system will be implemented, that is, the products printed with the words of origin (township, village group and farmer's name), variety, grade and quantity on each box will be swiped to ensure the quality of fruits.

(1) fruit selection and grading: According to the national standard "Fresh Citrus" (GB/T 12947-9 1), Chenggu tangerine (Chenggu citrus) is divided into three grades: excellent, first and second.

(2) Packaging: The provisions of Apple and Citrus Packaging (GB/T 13607-92) shall be implemented.

(3) Identification: The packaging identification of the same batch of Chenggu tangerines must be completely unified in form and content. The contents of the logo include the words and grade, origin, net weight, shipper's name, packaging date and selector code of the geographical indication of "Chenggu Tangerine" agricultural products. If the product has the specified number of fruits, the number of fruits should be indicated.

(4) Storage and transportation: Storage and transportation shall conform to the Green Food Storage and Transportation Guide (NY/T 1056-2006).