The grape ears of Zhangjiawan are neat, the fruit powder is intact, the peel is thick, and the fruit surface presents the characteristics of the variety; the flesh is fine, the ratio of sugar to acid is reasonable, and the palatability is good. Zhangjiawan has planted grapes since the Yuan Dynasty, and it has been seven or eight hundred years now.

Zhangjiawan Grape (Zhangwan Grape) Quality Technical Requirements I. Variety Jufeng, Jingya, Rose, Italy, Rizamat, Yafu Rosa and other high-quality varieties. Second, site conditions Soil type is sandy loam, groundwater level below 0.75m. The soil pH is 7.5 to 8.1 and the organic matter content is ≥1.2%. Third, cultivation management Seedling breeding: using cutting and grafting methods. 2. 3. Yield control: ≤22,500 kg per hectare. 4. Fertilizer water: Apply ≥3 tons of decomposed organic fertilizer base per 667m2 (mu) per year. The irrigation was stopped 10 days before harvesting. It is forbidden to use synthetic production regulators. 5. Environmental and safety requirements: The use of pesticides, fertilizers, etc. must comply with relevant national regulations and must not pollute the environment. 4. Harvesting According to the characteristics of the variety, when the soluble solid content is ≥16%, harvesting can be started. Stop harvesting when the temperature is too high at noon. Five, quality characteristics Sensory characteristics: the ears are neat, the fruit powder is intact, the peel is thick, and the fruit surface presents the characteristics of the variety; the flesh is fine, the ratio of sugar to acid is reasonable, and the palatability is good. 2. 16.0 16.0 16.0 Total acid content /% ≤ 0.80 0.85 0.70 0.75 0.60 0.60 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 ​​Zhangjiawan Grape (Zhangwan Grape) may apply to the Quality and Technical Supervision Bureau of Tongzhou District of Beijing for the use of the “Special Mark for Geographical Indication Products”, which is reviewed by the Beijing Municipal Bureau of Quality and Technical Supervision and reported to the National Quality. Announced after approval by the General Administration of Inspection and Quarantine. The statutory testing agency of Zhangjiawan Grape (Zhangwan Grape) is designated by the Beijing Municipal Bureau of Quality and Technical Supervision.