Matjiang grapefruit is a specialty of Matjiang County, Chongqing Municipality, and is also a national geographical indication for agricultural products. According to the China Specialties Association, the main characteristics of mat river grapefruit are inverted oval fruit, single fruit weight 1 ~ 1.5 kg, the maximum fruit weight of 2.25 kg, the fruit surface is round, the column point is obvious, the peduncle is slightly sunken, the fruit surface is yellow, the oil is glossy, the peel is thicker, the fruit heart is larger, the flap is kidney-shaped, the skin is easy to separate from the juice cells, the juice is yellow and white, it is not easy to break the crisp, the juice is flavorful, the crisp and tender slag, the sweet and sour is moderate, it has a honey flavor and aroma, and it is resistant to storage, which is called natural canned, and the taste reaches the best after 1 month of picking and storage.
Each 100 ml of fruit juice contains 8.55 grams of total sugar, 0.72 grams of total acid, 55.48 mg of vitamin C, 11% of soluble solids, and is rich in Ca, Mg, Fe, Zn, K and vitamin B, B1 and other nutrients. According to the test of medical experts at home and abroad, the fruit has the effect of strengthening the spleen, dissolving phlegm, rationalizing qi, relieving alcohol, dispelling fatigue, removing wind, relieving pain, etc., and is very suitable for obesity and diabetic patients, and is known as "green food" and "health food".
Matjiang grapefruit production area belongs to the subtropical humid monsoon climate, mild climate, abundant rainfall, four distinct seasons, long frost-free period, continental monsoon climate is remarkable, light, heat, water distribution in the year is basically synchronized, the four-season climate has early spring temperature recovery fast, often disturbed by cold air; late spring and early summer there are cotton rain, summer hot and drought; autumn has continuous rain, winter warm frost snow, more clouds, less sunshine, suitable for the growth of grapefruit climate requirements.
In 2018, the planting area of the citrus base in Matjiang County reached 143,000 mu, of which 65,000 mu were newly built standardized citrus orchards, and the output in 2017 was 130,000 tons. At present, Matjiang citrus has formed a "two-night characteristic" based on late-ripening citrus and late-ripening white grapefruit, of which the grapefruit planting area is 70,000 mu, with an annual output of 60,000 tons, and the late-ripening citrus planting area is 73,000 mu, with an annual output of 83,000 tons, which can drive more than 3,000 farmers in the town to increase their income and become rich.
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