The history of planting oranges in Longmen County has been more than 100 years. The unique climate, fertile soil and good ecological environment have produced a pollution-free, pesticide-free "Longmen Orange" with its orange-red bright color and smooth The peel, moderate sweetness and acidity, and the maturity of maturity - during the Spring Festival, have been well-known both at home and abroad since the 1980s.

[Landmark Geography] Longmen County is located in the east of central Guangdong Province. It is located on the edge of the Pearl River Delta. It has a subtropical monsoon climate, a unique geographical location and a beautiful natural environment. The Tropic of Cancer crosses the South Kunshan Mountains. The county has the characteristics of mild climate, abundant sunshine and abundant rainfall. The annual average temperature is 20.8 °C, the sunshine is sufficient, the rainfall is abundant, the annual average rainfall is 2150 mm, the annual frost-free period is more than 315 days, and the temperature difference between day and night is large; mountain and hilly area It accounts for 77% of the total area of ​​the county. It is a mountainous county with “eight mountains, one water and one field”. The mountain soils in Longmen County are mainly yellow soil, red soil and red soil, which are acidic and suitable for the growth of oranges. Therefore, Longmen County has unique conditions for producing oranges. [Culture background] Longmen County is mostly under the jurisdiction of Guangzhou Fuxia County. Since 1989, it has been under the jurisdiction of Huizhou City, Guangdong Province. Longmen County is located between Jiulian Mountain and Luofu Mountain. The southeastern part of the county and the mountains along its border are the Luofu Mountain System. According to the "Longmen County Records", Longmen cultivated oranges for nearly a thousand years. As early as the Eastern Jin Dynasty (317-420 years), Luan Yuan "Guangzhou Ji" had "Luofu Mountain has orange, summer ripe, real as Li; peeled skin is simmering, eating very sweet. There is also 'pot orange', The shape is sweet, but the skin is thick and odorous, and the taste is not bad. It can be seen that Luofu Mountain has recorded citrus at that time, and Maqi Town in Longmen County is located at the foot of Luofu Mountain. There is an allusion to the “Let's Go down the Mountain” since ancient times. The story tells the story of the Song Dynasty. It was said that a farmer who lived at the foot of the mountain had tasted "wild orange" when he went to the mountain to cut wood. He felt that "the taste was acceptable", and the latter three invited the wild orange down the mountain, and finally cultivated successfully, and gradually made the orange get rid of. According to the historical data of Longmen County, Maqi Town is the earliest township of citrus cultivation in the county. Longmen orange is a genus of citrus and citrus. It is a subtropical resident green fruit tree. It is warm and moist, cold, has strong shade tolerance, strong resistance to extensive cultivation, early knot and high yield, mature period in the Spring Festival. Before and after, it is often used as a gift for the New Year, hence the name "Year Orange". Longmen Orange is a traditional fruit in the southern region. It is famous for its color, fragrance and taste. When young men and women hold weddings or have children, the seniors will give them a pair of oranges and a bag of benefits, meaning "send a gift to the good fortune" to show blessings. On New Year's Eve, people put a pair of double gantry oranges on the stove, bedside, and countertops, meaning "great luck, good luck." This "year-old orange culture" has a long history in Longmen County, and it is long-lasting, which is enough to see the cultivation history of Longmen Orange in Longmen and its influence on the economic development and cultural life of Longmen. [Brand Construction] Longmen Years of Orange has several registered trademarks such as “Year of Red”. The citrus planting industry in Longmen County has developed rapidly and has gradually become the leading industry in the local agricultural economy. In 2009, the citrus planting area in Longmen County reached 22.5. Ten thousand mu (the county's fruit planting area is 280,000 mu), with a total output value of 550 million yuan. According to statistics, only one citrus, the per capita net income brought to farmers in Longmen County reached 1,300 yuan, and the cultivation of citrus has become the main way for farmers in the county to increase their income. Longmen County is determined to fully promote the specialty products of Longmen Orange and build a strong brand. We will do a good job in standardization production and quality and safety management, vigorously introduce and cultivate leading enterprises in citrus production and processing, and establish a sound production and sales network through the “company + base + farmer” model; provide advanced and applicable for fruit farmers free of charge through various information platforms. Technical information and regular quality tracking and testing services at all stages of citrus production. Through the "five unified (unified trademarks, unified technical regulations, unified specifications, unified packaging, unified publicity)" brand building. In August 2007, Longmen County was officially named by the China Economic Forest Association as the “Hometown of Chinese Oranges” and issued plaques and certificates.

Longmen orange quality technical requirements (a) varieties. The first place is the No. 1 Orange and the No. 2 Orange. (2) Site conditions. The soil type is loam, sandy loam or gravel loam, the active soil layer is more than 60 cm, the organic matter content is more than 1.5%, the pH value is 5.5 to 6.5, the water source is sufficient, the groundwater level is not higher than 80 cm, and the paddy field is less than or equal to 25 cm. . (3) Cultivation techniques. 1. Breeding: Grafting with sour orange, red orange, red lemon and alfalfa, and grafting with excellent virus-free mother tree. 2. Colonization: Planting is carried out after the new shoots are matured or before germination. Autumn planting is carried out in the early autumn season until early November; winter planting is carried out before the spring shoots from January to February; spring planting is carried out before the spring shoots are matured from April to May. Not subject to seasonal restrictions. Planting density ≤ 1650 plants / hectare. 3. Soil management: After the second autumn of the hilly land, the autumn shoots began to be deep-expanded and changed to soil, layered into mountain grass, green manure, soil fertilizer and lime, and finally covered with soil. The position is rotated and moved outside each year until the entire park is dug and the soil is changed. The paddy field is cultivated every year. 4. Plastic pruning: Through the measures of smearing, cutting, picking, pulling, shaping and trimming, cultivate high-yield trees. 5. Fertilization: The juvenile tree follows the principle of diligent application of thin application, so that “one shoot and two fertilizers” are mainly nitrogen fertilizer, and N:P:K is 1:0.4:0.8. As a result, the tree was applied with organic fertilizer, and the chemical fertilizer and various micro-fertilizers were rationally applied. The fertilization was greater than or equal to 5 times a year, and the organic fertilizer accounted for more than 50% of the total fertilization. 6. Moisture management: It is necessary to establish a complete irrigation and drainage system in the orange garden in accordance with the requirements of “dry irrigation and irrigation”. According to the growth characteristics of orange trees, reasonable irrigation and drainage. (4) Fruit harvesting. The fruit ripening period is from early January to early February, and the harvesting period is from early January to mid-April. Watering should be prohibited one week before harvesting. (5) Quality characteristics. 1. Sensory characteristics: the fruit is oblate, and the fruit has a transverse diameter of ≥40mm. The skin is thin and smooth, orange-yellow, bright and lustrous, and the oil cells are small and flat, and the skin is easily peeled off. The flesh is orange-yellow, the juice is soft and juicy, the flesh is sweet and sour, and the orange is rich. The gantry oranges are divided into special grades, first grade and second grade. The specific indicators should meet the requirements of Table 1: Table 1 Longmen Years Orange sensory features project requires special grade 1st grade fruit shape is correct, flat and rounded, flat and round . Allows slight deflection, smooth round fruit surface smooth, good evenness, good cleanliness, no pests, no defects, fruit peel is smooth, good leveling, good cleanliness, no pests, no defects The peel is light and rough, and the degree of uniformity is good. The cleanliness is general. It is allowed to have a small amount of defective fruit. There is no serious defect. The color of the fruit is orange and yellow. The coloration is good orange yellow and yellow. The coloration is good yellow and light yellow. The coloring is generally refreshing and tender. Moderately sweet and sour, good slag, good flesh, tender meat, moderate sweet and sour, good slag, good flesh, refreshing, tender, sweet and sour, good slag, transverse diameter ≥50mm≥45mm≥40mm2. Physical and chemical indicators : It should meet the requirements of Table 2: Table 2 Longmen Years Orange Physical and Chemical Indicators Project Indicators Soluble solids%≥ 12.5 Total acid g/100ml≤1.6 Edible rate%≥ 64

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Producers within the scope of protection of Longmen Years Orange Geographical Indication Products may submit an application to the Quality and Technical Supervision Bureau of Longmen County, Guangdong Province 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.