Zizhou County is located in the hinterland of the northern Shaanxi Plateau. It is mainly composed of loess soil. The soil layer is deep, the soil is loose, the drainage is good, and the water permeability is strong. It is especially suitable for the growth of scutellaria. Its cultivation of Astragalus has a long history and rich experience. Zizhou Huangqisu is famous for its thick and long strips, less wrinkles, firm and sturdy, powdery feet, sweet taste, bright color and high quality.

Zizhou Huangqi's quality characteristics and production area are related. Zizhou Huangqi Geographical Indication Product Protection Zone is located in the southern part of Yulin City. It is located in the hinterland of the hilly and gully region of the Loess Plateau in northern Shaanxi. It has a fixed river basin, 47Km from east to west and 59km from north to south. The county has an altitude of 900-1400m and a maximum altitude of 1402m. (1) Soil conditions Astragalus is a leguminous plant with long and thick roots. Its main value is in the roots. It requires the soil to be rich in organic matter, has a good agglomerate structure, and has good gas permeability and drainage. Zizhou is located in the hinterland of the hilly and gully region of the Loess Plateau. The loess layer is deep, rich in organic matter, loose in soil, strong in permeability, good in drainage, not easy to accumulate water, and the roots are easy to take root, and the roots are thick and not easy to occur. It is very suitable for the growth of jaundice. (II) Water Resources Conditions The rivers in the protected area of ​​the Huangzhou Geographical Indication Products of Zizhou are all in the Yellow River water system and the Wuding River Basin. Dali River and Huaining River are the two major water systems in Zizhou County. The drainage area in the county accounts for 68.5% of the total area of ​​the county. The annual average precipitation is 427.5mm, the rainfall is less, the total surface water flow is 8747m3, and the per capita is 400m3. The county's water resources are relatively scarce. Astragalus membranaceus is a perennial plant. It has a growth period of more than 2 years. The precipitation is too large, it is easy to make it decay and deteriorate, the precipitation is small, its growth is deeply rooted due to the need for water, and the root center is not easy to decay. (III) Climate and temperature conditions The sub-arid zone between the mid-temperate zone and the warm temperate zone of the Zizhou GI geographical protection product protection zone has the characteristics of continental monsoon climate. The annual sunshine hours are 2543.3 hours, the sunshine percentage is 59%, and the total solar radiation is 137.46 kcal / cm2, the annual physiological total radiation of 68.73 kcal / cm2, rich in light energy resources, suitable for the growth and development of Astragalus. The annual average temperature is 9.2 °C, the extreme maximum temperature is 38 °C, the extreme minimum temperature is -24.8 °C, the active accumulated temperature is greater than or equal to 10 °C, 3446.4 °C, 177 days, the hottest in July, the average temperature is 20.7-23.9 °C, the coldest in January, the average The temperature is -9.4--7.4 °C, the annual frost-free period is 170 days, the frost is on April 22, and the frost is on October 9. The yellow scorpion is fertile and cold-resistant and adapts to a cool climate. Zizhou is a continental monsoon climate with four distinct seasons and abundant sunshine throughout the year, which is conducive to the growth and development of scutellaria. Especially in July and August, the root growth of Astragalus membranaceus was in the critical period of nutrient absorption, accumulation and storage, and the poorer day had a greater impact on the accumulation of root material. At this time, Zizhou's climate is full of sunshine during the day, cool at night, and the day is worse, which is conducive to the sufficient accumulation of material in the roots of Astragalus membranaceus. It is an ecological condition that is especially suitable for the accumulation of nutrients in the growth and development of Astragalus membranaceus. It is very beneficial to the quality of drug input. The main reason for the high content of Astragalus polysaccharide, baicalin, astragaloside and other trace elements

Zizhou Huangqi quality technical requirements (a) provenance. Membrane scutellaria. (ii) Site conditions. Choose yellow cotton soil with deep soil layer, loose soil and good ventilation and drainage. The thickness of soil layer is ≥8 meters, the soil pH value is 6.5 to 7.5, and the flat slope or slope is less than or equal to 250. It is far away from pollution sources. (3) Cultivation techniques. 1. Planting: The quality standard of the seed reaches the same color, the grain is full, no pests and diseases, the 1000-grain weight is 5g to 8g, the germination rate is over 60%, and the purity is 98%. The sowing time is: autumn broadcast in mid-August to early September, spring sowing in mid-April. The seeding method is live or on-demand. In the spring, the grass is covered and moisturized before emergence, and the management is strengthened after emergence. The seedling height is ≥5cm and the seedlings are weeded. 2. Fertilization: Based on organic fertilizer, appropriate application of inorganic fertilizer, organic fertilizer per hectare ≥ 1.5 tons per year. The base fertilizer is applied before the preparation of the soil, and the seed field is followed by the application of phosphate fertilizer to increase the seed yield and quality. 3. Standards for irrigation water: Irrigation water quality implements the Quality Standard for Farmland Irrigation Water (GB5084-1992). 4. Environmental and safety requirements: The use of pesticides, fertilizers, etc. must comply with relevant national regulations and must not pollute the environment. (4) Mining. After 3 years of growth, the four-year-old plants are the best. The harvesting period is before the spring germination or the autumn leaves and leaves are withered. (5) Post-harvest handling and storage. 1. Post-harvest treatment: After mining, shake off the soil and sort by root length and thickness. Cut the dead parts and roots, dry or dry to a semi-dry, temperature below 60 ° C, straighten the roots, bundle them into small pieces, then dry or dry to dry, the water content is controlled at 8% to 12%. 2. Storage: The storage is required to be ventilated, dry, and the floor is concrete or flushable. The storage temperature is from 15 ° C to 20 ° C at normal temperature, and the relative humidity must be controlled between 45% and 60%. The storage period is no more than one year. (6) Quality characteristics. 1. Sensory characteristics: Zizhou Huangqi is cylindrical, firm and cotton, straight, uniform, with few branches; the appearance is yellow-brown, the surface has irregular longitudinal wrinkles or longitudinal grooves; the root section is white and yellow inside. Powdery feet, phloem yellow-white, with radial fissures; xylem is yellowish like chrysanthemum, accounting for about 2/3 of the radius. The gas is weak and specific, the taste is slightly sweet, and the chewing is soy. 2. Physical and chemical indicators: Astragalus glycosides content ≥0.8mg/g, total ash content ≤4%, acid-insoluble ash content ≤1.5%, polysaccharide content ≥6.5%. 3. Safety requirements: Product safety indicators must meet the relevant regulations of the state for similar products.

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Producers within the protection scope of Zizhou Huanghua Geographical Indication Products may submit an application for the use of “Special Marks for Geographical Indication Products” to the Quality and Technical Supervision Bureau of Zizhou County of Shaanxi Province, which shall be approved by the General Administration of Quality Supervision, Inspection and Quarantine.