Zizhou soybean has been planted in the Loess Plateau of northern Shaanxi for thousands of years. Zizhou relies on local native species and the unique hilly and gully mountainous terrain of Zizhou. It is dry and rainless, with the same season of rain and heat, large temperature difference between day and night, long growing period and long illumination time. A variety of special natural growth factors make Zizhou yellow bean granules hypertrophy, appearance elliptical flat, resembling human kidney, soy isoflavone content is more than twice that of Northeast, Gansu, Xinjiang and other places, becoming a veritable "king of beans" ". Zizhou yellow bean color is light yellow, normal odor, long elliptical micro-flat shape, brown small spots in the umbilicus, 1000 grain weight ≥ 246g, rich in soy isoflavones, content ≥ 1000.0 μg / g.

Zizhou Soybean Quality Technical Requirements 1. Variety of native native soybean varieties. Second, the site type soil type is loessial soil, the thickness of the tillage layer is ≥30cm, the soil pH is 7.2 to 7.8, and the organic matter content is ≥0.6%. Third, cultivation management Rotation: The rotation period is ≥ 2 years. The former crops are corn, millet and potato. 2. 3. Fertilization: based on organic fertilizer, appropriate topdressing. Apply organic fertilizer ≥15 tons per hectare per year. 4. Environmental and safety requirements: The use of pesticides, fertilizers, etc. must comply with relevant national regulations and must not pollute the environment. Fourth, harvest in late September, until 90% of the leaves fall off and harvest. V. Quality characteristics 1. Sensory characteristics: The bean is light yellow, the shape is long oval and flat, the umbilicus has small brown spots, and the bean flavor is strong. 2. 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 scope of Zizhou Huangdou's production area may submit an application to the Quality and Technical Supervision Bureau of Zizhou County of Shaanxi Province for the use of the “Special Mark for Geographical Indication Products”, which shall be reviewed by the Shaanxi Provincial Bureau of Quality and Technical Supervision and announced to the General Administration of Quality Supervision, Inspection and Quarantine for approval. . The inspection mechanism of Zizhou Soybean is selected by the Shaanxi Provincial Bureau of Quality and Technical Supervision in the inspection institutions that meet the qualification requirements.