Wanyuan City is located in the heart of the Daba Mountain in northeastern Sichuan at the junction of Sichuan, Shaanxi and Yunnan. It has unique natural conditions and obvious regional characteristics. It is the only natural selenium-rich area in Sichuan Province. The black eggs in the old courtyard are delicate in taste, rich in natural selenium, rich in nutrients and delicious in taste. The selenium content is 0.10-0.30 mg/kg, and the total amount of amino acids is 11.0~14.0%.

The old black eggs were produced in the old black chickens of the area. There are two kinds of eggshells: green shell and brown shell. The ratio of green shell to brown shell egg is about 30%, eggshell is thicker, and the average thickness is 0.31. Compared with the eggs produced by the good breed chickens on the market, the yolk color is yellow and red. The old black eggs are rich in nutrients, rich in selenium, and the nutrient content is obviously higher than that of local soil eggs. It has nourishing, beauty, delaying cell aging, improving human immune function, health care, etc. Special effects. The old black chicken is famous for its black feathers with green luster, black skin and green shell eggs. The annual output of eggs is about 150 eggs, and the average weight of eggs is 54.61g. The old black chicken was discovered by the Southwest Comprehensive Investigation Team of the Chinese Academy of Sciences in 1963. It was mainly produced in 10 towns and villages such as the old courtyard of Wanyuan City and the surrounding area. It was named “Old Chicken Black Chicken” and was designated as Sichuan Livestock Poultry in 1982. Excellent variety. Production environment The production area of ​​black chicken in the old courtyard of Wanyuan City, Sichuan Province is complex, with an altitude of 500 to 2300 meters, annual rainfall of 894.2 to 1672 mm, frost-free period of 196 to 254 days, annual average temperature of 14.2 to 15.4 °C, and maximum temperature of 38.8 °C. The lowest temperature is minus 4 °C. It mainly produces corn, wheat, rice, artichoke, red peony, miscellaneous grains, etc. The crops produced are rich in carbohydrates. The soil in the old courtyard area is rich in trace elements such as iodine, zinc and selenium. As there is no industrial pollution, the area is covered with trees, beautiful scenery, elegant environment, lush forests, 24% forest area and 30% grassland area. There are several provincial natural scenic spots such as Batai Mountain and Longtan River. It is a good base for the development of green food chicken industry. Product Features Wanyuan City is located in the heart of Daba Mountain in the northeastern part of Sichuan Province at the junction of Sichuan, Shaanxi and Yunnan. It has unique natural conditions and obvious regional characteristics. It is the only natural selenium-rich area in Sichuan Province. The black eggs in the old courtyard are delicate in taste, rich in natural selenium, rich in nutrients and delicious in taste. The selenium content is 0.10-0.30 mg/kg, and the total amount of amino acids is 11.0~14.0%. After the protection, the newly added black eggs in the old hospital will have an annual output value of 40 million yuan, and the county's per capita income will increase by 500 yuan. At present, the old black chicken has formed 9 professional breeding villages, built 14 breeding communities, 20 organic old black egg production bases, and an annual output of more than 60 million black eggs in the old courtyard. The old black egg industry has been included in the 12th Five-Year Plan for National Economic and Social Development of Wanyuan City, as the focus of the work of the large-scale agricultural (grazing) industry. It is planned that by 2015, the city will develop 50 old black chicken breeding villages in the old courtyard, and build 100 large-scale breeding communities and 50 organic black egg production bases. It is estimated that 200 million black eggs will be produced in the old yard, and the output value will be 5 100 million yuan. Product Awards After the domestic and foreign awards, the old black eggs were awarded the certificate of origin of pollution-free livestock products in 2005, and were evaluated as organic products in January 2007. In 2009, it was rated as “Tianfu Ten Treasures” by the Provincial Government Information Office and the Provincial Agricultural Office. It has been broadcasted many times on CCTV's “Financial Online” and “Get Rich” columns, and has been well received by domestic and foreign friends and consumers.

Old hospital black egg quality technical requirements (a) variety. Local black chicken. (2) Environmental conditions. The protected area is between 600m and 1400m above sea level, and the soil pH is 6.5 to 7.5. (3) Feeding management. 1. Feeding method: stocking during the day, entering at night, feeding in the morning and evening. 2. Feeding density: 100 to 200 667 m2 (mu) in the free-range area during laying, and 5/m2 in the house. 3. Laying period: hens start at 120 days of age, with an annual output of 120 to 150 eggs. . 4. Environmental and safety requirements: The prevention and control of the breeding environment and epidemic diseases must comply with relevant national regulations and must not pollute the environment. (4) Feed. Feed corn, rice, wheat, soybeans (fried), miscellaneous grains and other feed. (5) Quality characteristics. 1. Sensory features: The color of the eggshell is cyan or light brown, tough and thick, the surface is smooth and shiny; the protein is clear and viscous, and the yolk is orange or orange-red. 2. Physical and chemical indicators: project index egg weight g / ≥ 45 eggshell thickness mm0.35 ~ 0.41 total amino acid % 11.00 ~ 14.003. 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 black egg production area of ​​the old courtyard may apply to the Quality and Technical Supervision Bureau of Wanyuan City, Sichuan Province for the use of the “Special Mark for Geographical Indication Products”, which is reviewed by the Sichuan Provincial Bureau of Quality and Technical Supervision and reported to the AQSIQ for approval. Announced. The statutory testing agency for black eggs in the old courtyard is designated by the Sichuan Provincial Bureau of Quality and Technical Supervision.