Wulong alpine potato is a specialty of Wulong County, Chongqing, and is also a national geographical indication for agricultural products. According to the China Specialties Association, The Wulong Alpine potato stem is flat and round, the skin is yellow and white, the taste is good, it has a special fragrance, no rot, no peculiar smell, no diseases and insect pests, and no mechanical damage. Tubers generally contain 15% starch, 1.5% sugar, about 2% protein, 1.1% mineral salt and vitaminS B and C, etc., with high nutritional value, which can be used as a staple food and an excellent vegetable.
Wulong alpine potato production area regional strata are limestone, soil is yellow soil, mostly rocky soil, pH value of 5.5-6.5, organic matter content is average 2.6-3%; the ecological environment is superior, soil, agricultural irrigation water and air quality are good, no industrial "three wastes" pollution, at the same time, here belongs to the subtropical monsoon climate type, its main characteristics are: mild climate, abundant rainfall, four distinct seasons, spring rain, summer drought, autumn sponge, winter dry, more clouds, less sunshine, long frost-free period, three-dimensional differences. The average annual temperature is 10-17 °C, the annual rainfall is 1094.4 mm, the frost-free period is 210-260 days, and the relative humidity of the air is 74-83%, which is very suitable for growing potatoes.
In addition, Wulong alpine potatoes are divided into four grades after harvesting according to the product shape, color, freshness and product characteristics: primary, excellent, first and second. Special export enterprises use refrigerated trucks to transport to the port, and then use refrigerated containers to transport fresh vegetables to the southeast coast or export to Southeast Asia. Excellent vegetables with fresh vegetable plates, plastic wrap quantitative packaging, affixed vegetable quality and safety labels, and then stored in layers with plastic boxes, indicating the product name, net weight, place of origin, picking date, shockproof, etc., by the clean vegetable production and processing enterprises to use fast loading, fast delivery to the contract supermarket. First-class products are quickly transported in bulk or bagged to the main city of Chongqing and the surrounding wholesale markets. Second-class products are directly purchased by processing enterprises in the county and processed.
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