Xuefengshan Houttuynia, which is called “Xiancao” by the family, is not only a magical Chinese herbal medicine, but also one of the local specialties that often appear on the dinner table to entertain guests. On the dinner table of the family, you can see the figure of Houttuynia in the whole season. It eats it in the spring to clear away heat and detoxify; in summer, it eats appetizer and diuretic; in autumn, it eats lungs and pharynx; in winter, it nourishes warmth and strengthens resistance. Houttuynia cordata grows under the yellow-brown soil with a pH of 5.5 to 6.5 on the Xuefeng Mountain at an altitude of 1934 meters. The fertile production area has a good and vitality, and it is a perfect match with the family bacon. The palate is soft and full-bodied; mixing the tender and tender Houttuynia with the chopped peppers of the clams makes it a good meal, a crisp and refreshing salad.

Technical requirements for quality of Houttuynia cordata Thunb. I. Variety Amaranth (Houttuynia cordata Thunb.). Second, the site conditions between 200 m to 1000 m above sea level, flat terrain of paddy fields and gentle slopes, the soil is mainly sandy loam, the tillage layer is more than 30cm deep, pH value is between 5.0 and 6.5. Third, cultivation management 1. Select the Qingyuan: remove the weeds in the field before planting, turn the soil over and disinfect for more than a week, and do a wide sputum. 2. Selection of seed stalks: underground stalks with no plaques, buds full and strong, and 0.25 to 0.5 cm in diameter. 3. Planting: Planting from October to December each year, the thickness of the soil is 8 to 10cm, the dosage of the stem is 40 to 50kg per 667m2 (mu), and the bottom fertilizer is covered with straw. 4. Topdressing and weeding: Picking up decomposed organic fertilizer 2 times during the vigorous growth period and artificial weeding. 5. Rotation: water and drought rotation, the former crop must be aquatic crops, and the crop should be rotated for one year or more. 6. Harvesting and cleaning: (1) Harvesting: 8 months of childbearing age, harvested on sunny days. (2) Cleaning: Remove diseased stems and impurities, clean and drain the package. 7. Environmental and safety requirements: Irrigation water, fertilizer, processing water, etc. must comply with relevant national regulations. Fourth, the quality characteristics 1. Sensory characteristics: underground stems uniform thickness, length 20 to 45cm, diameter 0.25 to 0.45cm, less roots, white color, crisp and tender, less residue, refreshing, fishy aroma. 2. Physical and chemical indicators: starch ≥ 7%, crude cellulose ≤ 8.0%. 3. Safety and other quality technical requirements: Product safety and other quality technical requirements must comply with relevant national regulations.

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Producers within the production area of ​​Yufengshan Houttuyniae may submit an application to the Huaihua Quality and Technical Supervision Bureau for the use of the “Special Mark for Geographical Indication Products”, which shall be reviewed by the Hunan Provincial Bureau of Quality and Technical Supervision and announced to the General Administration of Quality Supervision, Inspection and Quarantine for approval. The detection mechanism of Xuefengshan Houttuynia cordata is selected by the Hunan Provincial Bureau of Quality and Technical Supervision in a testing institution that meets the qualification requirements.