The shape of Nanhu Ling is round and hornless, its skin color is green and green, and the two ends are smooth, and it is better than other varieties with thin skin, tender meat, juicy juice, sweet and crisp, and fragrant. Nanhu Ling can not only eat raw food, but also eat it, and it can also make cakes, food or wine, and sugar.

Nanhu Ling quality technical requirements (a) varieties. Yuan Bao Ling. (2) Site conditions. Select ponds, river bays and low-lying paddy fields with a water depth of no more than 250 cm in the protected area. The soil pH is 5.6 to 7.5, the depth of the soil sludge layer is 20 cm or more, and the organic matter content is 1.5% or more. (3) Cultivation management. 1. Preparation before planting: (1) Seed selection: Select a single seed with a fruit weight of 12g or more as a diamond. (2) Qingtang: Clear the wild diamond. (3) Fertilization: 1000 kg of organic fertilizer is applied per 667 m2 (mu). 2. Seeding: (1) Time: From late March to early April, the daily average temperature has risen steadily above 8 °C. (2) Method: 1 Live broadcast: The seeding amount per hectare is ≤300kg. 2 seedling transplanting: seedlings per 667m2 (mu) seedbed is 80 kg to 100kg. About 50 days after sowing, Lingmiao 3 leaves and 1 heart transplanted. The transplanting plants were planted at a row spacing of 1.5m to 2.0m, with 3 seedlings per hole. 3. Organize the diamond plate: Before the high temperature season in late July, the water will be arranged. Cut the small diamond plate just below the water surface and the diameter below 20cm. 4. Environmental and safety requirements: The use of pesticides, fertilizers, etc. must comply with relevant national regulations and must not pollute the environment. (4) Harvesting. 1. Tender. In early September, the fruit was initially hardened, and the fruit epidermis remained pale green. When the bracts fell off, they were harvested in batches. 2. Lao Ling. At the end of October, the fruit was fully hardened, the peel was yellow-green, and ring-shaped cracks had appeared at the junction of the fruit and the stalk, which were harvested in batches. (5) Quality characteristics. 1. Sensory features: (1) tender diamond: the fruit is initially hardened, the skin is green, the skin is thin and tender, the juice is sweet and crisp, and the skin can be gently caught with the nails and floated in the water. (2) Laoling: The fruit is fully hardened, the peel is yellow-green, and the fruit and the stalk appear ring-shaped cracks, which sink into the water. 2. Physical and chemical indicators: the basic nutrient content of Nanhu Ling pulp: Category specification g / protein g / 100g carbohydrate g / 100g ash g / 100g moisture g / 100g vitamin Cmg / 100g tender Ling ≥ 102.1510.410.6084.902.24 old Ling ≥123.6233.9669.27.193. Safety requirements: Product safety indicators must meet the relevant regulations of the state for similar products.

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Producers within the scope of protection of Nanhu Ling Geographical Indication Products may apply to the Jiaxing Entry-Exit Inspection and Quarantine Bureau for the use of the “Special Mark for Geographical Indication Products”, which shall be approved by the Zhejiang Entry-Exit Inspection and Quarantine Bureau and approved by the AQSIQ. The legal inspection agency of Nanhu Ling is designated by the Zhejiang Entry-Exit Inspection and Quarantine Bureau.