Huaishan, a famous specialty of Yangshan, has the characteristics of white color, soft and smooth color, color, fragrance and good taste. Huaishan, also known as yam, is edible or medicinal with its large roots. It is rich in flesh and rich in starch. Huaishan has a unique flavor and is a precious vegetable. It is often used as a food in the tropics. It is also a tonic and a good raw material for winemaking. Huaishan is a perennial perennial vine plant. It is warm and not cold-resistant. It begins to germinate above 10 °C, and the growth of stems and leaves is 25 °C-28 °C. The tuber enlargement is the fastest at 20 °C-24 °C.

Yangshan Huaishan Quality Technical Requirements I. Variety Local traditional Huaishan variety. Second, site conditions Within the scope of production, choose the mature land along the banks of the river; the soil layer is deep, the gas permeability is good, the organic matter content is ≥2%, the slightly acidic to neutral tidal sand mudland; the rotation period is more than 3 years. Third, cultivation management Seed selection: potato chips weighing 1kg to 1.5kg in a single stem are used as potato seeds, and potato chips are taken in the upper part of the tuber. 2. Fully decomposed manure. Dig the ring drainage ditch, and the cross-groove should be added to the field with a length of more than 20m. 3. Colonization: (1) Planting density: planting in a single row, row spacing 130cm to 140cm, plant spacing 25cm to 30cm, planting 27,000 to 37,500 plants per hectare. (2) Colonization time: from April to mid-May. Fourth, water and fertilizer management Fertilization: After the seedlings are released, apply the seedling fertilizer every 20 days, and apply the fermented organic fertilizer per hectare 15t to 22.5t for 2 to 3 times. In mid-August, the potato fertilizer was applied and 750 kg of decomposed peanut bran was applied per hectare. 2. 5. Harvesting time is from mid-November to spring of next year. Sixth, quality characteristics 1. Sensory characteristics: the skin is yellowish brown, the flesh is white; the long column is 50cm to 80cm long and the diameter is ≥3.4cm; the fleshy tissue is compact, delicate and colloidal; it is delicious and sweet. 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 Yangshan Huaishan production area may apply to the Yangshan County Quality and Technical Supervision Bureau of Guangdong Province for the use of the “Special Mark for Geographical Indication Products”, which shall be reviewed by the Guangdong Provincial Bureau of Quality and Technical Supervision and reported to the General Administration of Quality Supervision, Inspection and Quarantine for approval. . The testing organization of Yangshan Huaishan is selected by the Guangdong Provincial Bureau of Quality and Technical Supervision in the testing institutions that meet the qualification requirements.