Dunhuang grape - red earth grape: the fruit is nearly round, the fruit is thick, bright red to dark red, the flesh is crisp and hard, sweet, Dunhuang grape - seedless white grape: the fruit is oval, the skin is thin, green and yellow. Crispy, less juice-free, sweet and sour, quality

The origin of Dunhuang grape is Shazhou Town, Qili Town, Suzhou Town, Zhunqu Town, Mogao Town, Yangguan Town, Yueya Spring Town, Guojiabao Township Township, Huangqu Township and State-run of Dunhuang City, Jiuquan City, Gansu Province. There are 10 townships and farms in Dunhuang Farm, which are under administrative jurisdiction. The grape planting is divided into two main areas, the Nanhu Irrigation District is dominated by seedless white, and the Danghe Irrigation District is dominated by red earth. The grape base in Yangguan Town, Dunhuang, Gansu Province is the largest fresh grape production base in Gansu Province. It is located near the ancient Yangguan site in the west of Gansu, in the Tang poetry, “Zhao Jun enters a glass of wine, and the west is out of the sun.” The annual average temperature of the base is about 9-3 °C, the accumulated temperature of ≥10 °C is above 3600 °C, the annual precipitation is only about 40 mm, and the annual sunshine hours are about 3260 hours. The sun is abundant and the air humidity is small, mainly relying on spring water to irrigate. The cultivated land is all sandy land, the pests and diseases are very few, the dry matter accumulation of the grape fruit is many, and the ecological conditions are very suitable for producing high-quality grapes with no pollution. All the cultivated land in the town is currently planted with grapes, which is a rare township for grape production in the country. Geographical conditions Dunhuang's grapes are good, mainly in two aspects, one aspect is the unique natural conditions. For example, Dunhuang's altitude is 1138, the illumination time is long, the temperature difference between day and night is large, and the organic matter produced by photosynthesis during the day is stored in the fruit in the evening. This is the best condition. Of course, there is another one. Our Dunhuang is a sandy loam and the soil conditions are better. The sea level is 1100 to 1200 meters in the area of ​​origin. The soil type is gray calcium desert soil, the texture is sandy loam soil, and the soil pH is 7.8 to 8.3. The soil organic matter content is ≥9.7 mg/kg. The Qilian Mountain water source provides irrigation areas.

Technical requirements for quality of Dunhuang grape I. Variety Red earth, no nuclear white. Second, site conditions Within the scope of production, the sea is 1100 to 1200 meters. The soil type is gray calcium desert soil, the texture is sandy loam soil, and the soil pH is 7.8 to 8.3. The soil organic matter content is ≥9.7 mg/kg. The Qilian Mountain water source provides irrigation areas. Third, cultivation management Seedlings: Seedless white seedlings are used, and the red earth uses the following three types of seedlings. 2. Nutrition bag seedlings specifications: seedling height 15 to 20 cm, with 3 pieces of leaf, that is, "three leaves and one heart", requires the leaves are dark green, the pier is strong and strong, no length; more than 4 new roots; no quarantine pests and diseases. 3. Cutting seedlings specifications: 5 cm per year, new diameter ≥ 0.4 cm; more than 6 mature sections, 2 to 3 full buds; 5 or more roots with a thickness of 3 mm or more and a length of 20 cm or more; Quarantine pests and diseases, no damage. 4. Grafted seedlings specifications: Select varieties of seedlings grafted with excellent rootstocks such as Beida and SO4 to improve the drought resistance, cold resistance and salt and alkali resistance of the tree. 5. Colonization: (1) Ditching: to be wide, deep, flat and straight. That is, the groove width is 0.8 to 1 m, and the groove depth is 0.8 m. The groove line should be straight. (2) Colonization time: late April. (3) Density: The row spacing of seedless white plants is 0.5×4.5 meters, ≤ 4440 plants per hectare, and the row spacing of red earth plants is 0.7×4.5m, ≤ 3180 plants per hectare. 6. Fertilization: base fertilizer application of organic fertilizer 1250 to 3500 kg / 667 m2 (mu), diammonium phosphate 40 to 50 kg / 667 m2 (mu). 7. Irrigation: Overall grasp the principle of shallow pouring and shallow watering, watering 5 to 8 times in the whole life. The interval between head water and dihydrate is 25 to 30 days, and the interval between two water and three water is 20 to 25 days. Water is poured every 10 days into the fruit expansion period, and the soil moisture content is required to be 75 to 85%. Watering was stopped 10 to 15 days before harvest. 8. Environmental and safety requirements: The use of pesticides, fertilizers, etc. must comply with relevant national regulations and must not pollute the environment. Fourth, harvest 1. Maturity time: The non-nuclear white is from mid-August to early September, and the red earth is from mid-September to early October. 2. It is advisable to place 1 to 2 layers of fruit in the fruit box. 5. Quality characteristics 1. Sensory characteristics: Project indicators: seedless white red earth ear spikes beautiful and neat, conical, even fruit, 60 ~ 80; single ear weight 650 ~ 800 grams; the ear of the fruit is relatively neat, conical, cone-shaped, fruit More uniform, 80~100 grains; ear weight 1000~1250g; fruit ear is moderately evacuated, can share fruit weight 4~6g, uniform, fruit size intact, sweet and sweet grain weight 10~25g, single grain horizontal The diameter is 25~27 mm; the medium and small particles of 9-11 g per pan are not more than 5%, the fruit is thick and mature, the fruit is fully mature, the fruit is ≥98%, the color is non-nuclear, the white color is yellow-green, solid, elastic, full, and the fruit powder is complete. The color of the red earth is bright red, solid, elastic and full, the fruit powder is complete, the red fruit is 95%, the storage and taste are sweet, refreshing, fragrant, juicy and crisp, and have the inherent flavor of this variety. 2. Safety and other quality technical requirements: Product safety and other quality technical requirements must comply with relevant national regulations.

Apply to：
Producers within the scope of Dunhuang grape production area may apply to the Dunhuang Quality and Technical Supervision Bureau of Gansu Province for the use of the “Special Mark for Geographical Indication Products”, which shall be reviewed by the Gansu Provincial Bureau of Quality and Technical Supervision and reported to the AQSIQ for approval. The legal inspection agency of Dunhuang grape is designated by the Gansu Provincial Bureau of Quality and Technical Supervision.