Nankang sweet pomelo has a planting history of more than 1,500 years in Cangzhou City. Due to the specific environmental climate and soil conditions, combined with traditional planting techniques, it forms the unique characteristics of Nankang sweet grapefruit. The peel has aroma and aroma, and the flesh is crisp and tender. The slag is refreshing and has a beeswax color. The honey is sweet and sweet with a slight apple flavor. It has a long aftertaste and unique flavor. It is unique in the pomelo. After eating, there is a clear heart and eyesight, the feeling of degreasing in addition to oil, is beneficial to the stomach and digestion. The pomelo meat has three layers of outer, middle and inner cortex, and the external pollution is difficult to invade. The pomelo fruit is known as the natural "green food" and "natural canned". It was listed as a tribute in the Qing Dynasty and enjoys a high reputation both at home and abroad.

Nankang sweet pomelo quality technical requirements (a) variety. Zhapo pomelo, dragon back early ripe pomelo. (2) Site conditions. Slope ≤ 25 degrees; soil thickness ≥ 1.5 m; organic matter content ≥ 1%, pH 5.5 to 6.5, groundwater level ≥ 1 m of loam or sandy loam. (3) Seedling breeding. Take the acid pomelo as the drill wood, take the scion from the fine mother tree, graft and breed. (4) Cultivation management. 1. Colonization: Planting time is spring planting (January to February) and autumn value (10 to November), planting density is 5 m × 6 m, mountain density is 5 m × 5 m. 2. Trimming: The principle of ventilation and light transmission and maximizing the photosynthetic area. 3. Soil and fertilizer management: The orchard is planted with green manure and grass cultivation. Fertilization is mainly based on organic fertilizer and supplemented by chemical fertilizer. 30 tons of decomposed organic fertilizer is applied per hectare per year. Water is drained in time during the rainy season. 4. Picking: Longhui early-ripening pomelo is picked in the middle and late September, and Zhapo pomelo is picked in the upper and middle of November (after the winter). The peel can be harvested 80% above the color, and one fruit and two cuts are required for picking. 5. Environmental and safety requirements: The use of pesticides, fertilizers, etc. must comply with relevant national regulations and must not pollute the environment. (5) Quality characteristics. 1. Sensory characteristics: (1) Zhapo pomelo: gourd-shaped, fruit pedicle into a short neck, fruit top "money" fetal mark is obvious; fruit oil is uniform, obvious, orange-yellow after maturity, with unique 樟The fragrant type is rich in pomelo; the flesh is crispy and tender, with a beeswax color, honey sweet and sweet, slightly appley and lasting. (2) Longhui early ripe pomelo: gourd-shaped or pear-shaped, the center of the fruit top is slightly concave, with a blue-printed ring. The size of the oil cell is uneven and dense, slightly convex, the pits are sparse and less, the fruit base is shorter, the one side is high, and the side is low. Young fruit and immature fruit, the fruit surface is densely covered with a layer of fluff. After ripening, it is orange-yellow, and the flesh is crispy and tender. It is sweet and slightly sour, with aroma and flavor. 2. Physical and chemical indicators: Nankang sweet pomelo solid acid ratio ≥17.8, soluble solids ≥10.2%, edible rate ≥40.4%, other main physical and chemical indicators are as follows: variety solid acid than soluble solids (%) edible rate ( %) Zhapo pomelo ≥36.6≥11.2≥40.4 Longhui early ripe pomelo ≥17.8≥10.2≥46.93. 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 Nankang sweet pomelo geographical indication products may apply to the Nankang Quality and Technical Supervision Bureau of Jiangxi Province for the use of the “Special Mark for Geographical Indication Products”, which is reviewed by the Jiangxi Provincial Bureau of Quality and Technical Supervision and is subject to national quality inspection. The General Administration announced the approval. The statutory testing agency of Nankang sweet pomelo is designated by the Jiangxi Provincial Bureau of Quality and Technical Supervision.