Kangping sweet potato, special product of Kangping County, Shenyang City, Liaoning Province. Kangping sweet potato has bright color, spinning type and smooth skin. The taste is sweet, cotton, sand, and strong. Bright color, spinning type, smooth skin, high crude fiber content.

The northeastern part of Kangping and the west are bordered by Horqin sandy land. The terrain is flat. It has the largest lake in Wolong Lake in Liaoning. It is rich in water resources and has good natural ecology. In addition, the temperature difference between day and night is large, sunshine is sufficient, and autumn is dry, which is conducive to the accumulation of sweet potato sugar and various nutrients. The content of crude polysaccharide is high, so "Kangping sweet potato" has the taste of "sweet sand", and the head is uniform and the color is the same. Sweet potato, also known as hawthorn, sweet potato, sweet potato, etc., is rich in protein, starch, pectin, cellulose, amino acids, vitamins and various minerals. The origin of "Kangping sweet potato" can be traced back to the Qing Dynasty. During the Jiaqing period, the land was abandoned, and a large number of Shandong and Hebei immigrants, Guan Guandong, came to the northeast to open the land. The sweet potato was planted in Kangping's land at that time. "Kangping sweet potato" seedling planting is the "earth" method passed down by the ancestors: the seedling time is in early April, the selected sweet potato is more than 150g after the winter, the size is even and neat, the skin is smooth and the color is bright. Soak the seeds before seedlings with 50-52 degrees warm water for 10 minutes to 20 minutes, then immediately soak the cold water, which can prevent sweet potato nematode and black spot. The seedbed of "Kangping sweet potato" is a farmer's bandit. It is made of adobe or brick in a rectangular shape on the fire. It is higher than the soil layer, and the bottom is covered with straw to keep warm. Sprinkle a layer of decomposed horse manure as the base fertilizer, then sand, then mature soil. . Different stages are supplemented with different temperatures; the bed soil temperature is controlled at 30-35 degrees after planting the potatoes and before emergence. The temperature after emergence is controlled at 27-30 degrees, and the low temperature seedlings are carried out 5 days before the seedlings, and the temperature is 20-25 degrees. After demolition, the temperature is raised to 30-35 degrees, the seedlings are promoted for 3 days, then the temperature is 20-25 degrees, 3-4 days seedlings; the soil moisture during the seedling period is maintained at 70%-80%, and the water is irrigated 5-6 days before the seedlings. Before the sweet potato is planted, it is necessary to rotate the broad ridge to facilitate the extension of the sweet potato.

Technical requirements for quality of Kangping sweet potato 1. Variety Local traditional sweet potato varieties. Second, the site conditions Po Kong land. The soil type is aeolian sandy soil, the soil texture is medium loam soil, the pH range is 6.82 to 7.9, and the organic matter content is ≥1.2%. Third, cultivation techniques Seedling: (1) Seedling time: From early to mid-April. (2) Nursery: Use adobe or brick to form a rectangular shape on the fire raft, higher than the soil layer, the bottom is covered with stalks for heat preservation, and the stalk is sprinkled with a layer of decomposed squid horse dung, then sand is laid, and then the soil is cooked. (3) Selected seed potatoes: The seed potato is a winter sweet potato with a weight of 150g or more, a smooth skin and bright color. (4) Seed soaking: soak seeds in warm water at 50 ° C to 52 ° C for 10 to 12 minutes. (5) Bauxite cultivation: 6 kg to 7 kg of potato planted per m2, covering soil 3 cm to 4 cm. (6) Seedling management: Before planting potatoes, before bed emergence, the bed soil temperature is controlled at 30 °C to 35 °C. The temperature after emergence is controlled at 27 ° C to 30 ° C, and the low temperature seedlings are carried out 5 days before the seedlings, and the temperature is 20 ° C to 25 ° C. After demolition, the temperature is raised to 30 ° C to 35 ° C, 3 days to promote seedlings, then the temperature is 20 ° C to 25 ° C, 3 to 4 days of seedlings. The soil moisture during the nursery period was maintained at 70% to 80%, and the water was irrigated 5 to 6 days before emergence. 2. The transplanting density is 4,000 to 5,000 per 667 m2 (mu). 3. Field management: (1) Pre-growth period (from planting to sealing before ridge): 3 to 5 days after planting, check the seedlings. Two or more cultivators and weeds are carried out between 60 and 70 days after planting. In the last one or two times of cultivating, it is necessary to combine the ridges and ridges. The main stem grows to about 50 cm, and the top buds are removed when the branches are grown to 50 cm to 60 cm long. (2) Middle growth period (from sealing to ridge): 70 to 120 days after planting, 2 times of vine treatment, and 15 to 20 days between the two vines. (3) Late growth (from the beginning of the stem and leaf to the harvest period): pay attention to timely drainage. 4. Harvest: From mid-September to late September, the leaves of the sweet potato are partially yellowed and harvested in time. 5. Environmental and safety requirements: The use of pesticides, fertilizers, etc. must comply with relevant national regulations and must not pollute the environment. Fourth, quality characteristics Sensory features: bright color, spinning type, smooth skin. The taste is sweet, cotton, sand, and strong. 2. 3. Safety and other quality technical requirements: Product safety and other quality technical requirements must comply with relevant national regulations.

Apply to：
Producers within the scope of Kangping sweet potato production area may apply to the Quality and Technical Supervision Bureau of Kangping County of Liaoning Province for the use of the “Special Mark for Geographical Indication Products”, which shall be reviewed by the Liaoning Provincial Bureau of Quality and Technical Supervision and reported to the General Administration of Quality Supervision, Inspection and Quarantine for approval. The legal inspection agency of Kangping sweet potato is designated by Liaoning Quality and Technical Supervision Bureau.