The large longitudinal lake hairy crabs are produced in similar waters in the Dazhong Lake and Yandu area of ​​Yancheng, Jiangsu. Because the crab lives in a fresh water environment for a lifetime, it is commonly known as the clear water crab. Green back white belly, golden claw yellow hair, strong chelation, delicious meat and rich nutrition. "Autumn winds, proud Ju Huang, is the year of crabs." Every golden season is the peak season for hairy crabs. As the saying goes, "nine females, ten males" said that this is because the female crabs in September and the male crabs in October have the best gonad development. Cooked and condensed, the female is golden yellow, and the male is like white jade, which tastes delicious.

Dazhang Lake is located in Yandu District, Yancheng City, Jiangsu Province, and Xinghua City, Taizhou City. It is also known as Pinghu Lake. It is one of the remnant lakes after the disintegration of the ancient Sheyang Lake. Located in the hinterland of the Lixiahe Plain, it is the lowest in the Yundong Lake Group. The lake shape is slightly elliptical, with a lake area of ​​36.783 square kilometers and Yancheng area of ​​19.772 square kilometers, accounting for 53.75% of the total water area. It is a type I freshwater lake of carbonate sodium group. Dazhong Lake is a water-type lake. The southern and western squid rivers, Zhongyin River and Daxi River are the main inflow rivers, and the northeastern Weisong River is the main water channel. The lake basin is shallow, the terrain is slightly inclined from the northeast to the southwest, and the deep water area is located in the southwest of the lake. The average annual water depth is between 1.2 meters and 1.5 meters. The bottom of the lake is flat, the soil is hard, mostly chicken bone soil, and there is very little mud. The lake is crystal clear and can be seen in fish and shrimp. The natural bait is rich, suitable for a variety of water and plant growth. Dazhanghu Town is located in the Lixiahe River network area. The lakes and rivers criss-cross, with a lake overlooking the water, clear and transparent secondary water quality, well-preserved ecological environment, and pleasant climate of four seasons. Wetland ecological resources, rich in wild animal resources, there are 51 species of birds, of which long-tailed Shrike, tiger-grained Shrike, swan, etc. are rare birds. The large longitudinal lake hairy crabs are produced in similar waters in the Dazhong Lake and Yandu area of ​​Yancheng, Jiangsu. Because the crab lives in a fresh water environment for a lifetime, it is commonly known as the clear water crab. Green back white belly, golden claw yellow hair, strong chelation, delicious meat and rich nutrition. u0026quot;Autumn wind up, proud Ju Huang, it is a year of crabs." During the golden autumn season, it is the peak season for hairy crabs. The saying goes "nine females, ten males", this is because the females in the lunar calendar in September Crab, male crab in October, the best development of gonads. Cooked and coagulated, the female is golden yellow, the male is like white jade, and the taste is delicious. Yancheng Dazhanghu hairy crab industry has paid great attention to brand strategy in the development process for decades. The implementation of the brand strategy throughout the development of the company. Through upgrading the quality, summarizing the characteristics, registering trademarks, participating in domestic and international food fairs, trade fairs, making full use of the origin of agricultural products resources, showing their own unique quality, has been identified as pollution-free water There are 29 production bases with an area of ​​114,800 mu, 5 certified green foods, 33 pollution-free aquatic products, 12 registered trademarks, 9 self-owned brands, including 2 provincial-level famous brands and 3 municipal-level famous brands. .

Technical requirements for quality of large longitudinal lake hairy crabs 1. Cultured species Eriocheir sinensis in the Yangtze River system. Second, the culture environment large vertical lake natural waters, water quality in line with national fishery water quality standards, pH 7.2 to 7.8, dissolved oxygen ≥ 5mg / L, transparency ≥ 40cm, water depth 1.0 to 1.8m, water grass coverage rate 40% to 60%. Third, aquaculture management Source of crab species: The parents are selected from the Chinese mitten crabs in the Yangtze River system, and the crab seedlings are from provincial and above elite farms. 2. 3. Crab stocking: The stocking density of crab species is 600 to 800/667m2 (mu), and the stocking time is from February to March every year. The specifications are 120 to 180/kg, and no sexual mature crab species are allowed. 4. Feed feeding: Feeding special granules for river crabs, chilled sea (light) water fish, snails, corn and various water plants. 5. Environmental and safety requirements: Feeding environment, prevention and control of epidemic diseases must implement relevant national regulations and must not pollute the environment. 4. The fishing time is from October to December. The male crabs are ≥150g/head and the female crabs are ≥125g/only. V. Quality characteristics 1. Sensory features: green shell, white belly, golden claws, yellow hair, creamy, sweet, fresh. 2. (2) Crude fat: male crab ≥ 7%, female crab ≥ 9%. 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 ​​Dazhong Lake hairy crabs may apply to the Quality and Technical Supervision Bureau of Yandu District, Yancheng City, Jiangsu Province for the use of “Special Marks for Geographical Indication Products”, which are reviewed by the Jiangsu Provincial Bureau of Quality and Technical Supervision and submitted to the General Administration of Quality Supervision, Inspection and Quarantine for approval. After the announcement. The inspection mechanism of the big longitudinal lake hairy crabs is selected by the Jiangsu Provincial Bureau of Quality and Technical Supervision in the inspection institutions that meet the qualification requirements.