Chen Ji Ya Chuan includes two varieties of Xi Shi seeds and chicken skin rough. The shape is slender, round and straight; the meat is fine and white, the nutrient-rich mucus juice is thick and sticky, and the silver wire can be pulled out repeatedly; the texture is hard as an iron stick, the long-lasting quality is not scattered, and the shape is unchanged; "Face, sweet, fragrant, cotton, cool" in one. "To make the West Lake better than the West, the makeup is always appropriate." When Xi Shi with Fan Yi abandoned the official business and settled in Taoqiu (now Dingtao), the introduction of yam, products such as human beauty, quality like humanity. Probably beautiful Xizi would not have thought: Time and space have experienced more than 2,400 reincarnations. In the past, it was a good one. The introduced yam is still being planted in the second hometown. It is still cultivating the people and raising the wisdom of people.

Although the collection of yam and yam is superior to the millennium, it has been closed and semi-closed due to many factors such as traditional conservative ideas. In particular, Shih Tzu seed yam was still in the tradition of planting in 1979. An endangered millennium of high-quality varieties, more and more seemingly secret and precious. In 2008, Chen Ji Yam was certified as “National Geographical Indications Protection Product”. In 2009, Dingtao County established the “Dingtao Tianzhong Chenji Yam Professional Cooperative”. In 2010, the General Administration of Quality Supervision, Inspection and Quarantine approved the “Tianzhi Green Leaf Brand Chen Ji Yax” of Tianzhong Cooperative with the announcement of the No. 72 Announcement. Under the guidance, protection and marketing of the Tianzhong Cooperative, the geographical indication Chenji yam has developed rapidly and has become the dominant pillar industry of Dingtao County. Tianzhong Cooperative has implemented the production rules, technical training, purchase and supply of raw materials, brand certification, product grading, product recycling, packaging and sales, with the geographical indication Chenji yam as the industry, effectively ensuring product quality and geographical indication protection. Zero complaints in the five-year market. In the brand building operation, the Tianzhong Cooperative held a “Geographical Signature Chen Ji Yaxun Press Conference” in Beijing Diaoyutai, followed by CCTV’s 4 sets of “Going Around China”, 2 sets of “Life and Wealth” and “Consumer Proposition”, seven sets. The township contract and the Daily Agriculture Economics have successively reported on the interview. At this point, the reputation of Chenji Yam brand has increased rapidly. Every year after the end of October, the yam harvest season, the merchants of 26 provinces and cities in China gathered in Dingtao Chenji, and the daily sales volume was over 200,000 kg. In the marketing operation, Tianzhong Cooperative cooperated with the leading agricultural product processing enterprises, “China Food Duqing (Shandong) Biotechnology Co., Ltd.” and “Shandong Tianjiu Biotechnology Co., Ltd.” to carry out deep processing of products. The cooperative is responsible for providing the geographical indications of the yam yam raw materials, and the processing leading enterprises are responsible for the development and processing of the products. Nine series of products, such as yam powder, yam crisp, canned yam, yam fruit, and frozen yam granules, have been developed. Under the guidance of the Tianzhong Cooperative, Chen Jishan has undergone five major changes since the implementation of the “National Geographical Indications Protection”: the annual production area has increased from 2 thousand mu to 40,000 mu, an increase of 20 times; the product price has increased by 2.5 per kilogram. Yuan, increased by 80%; the output of mu increased from an average of 1600 kilograms to 2200 kilograms, and the annual yield per mu increased by 37%; the profit of farmers planting Chenji yam increased from an average of 400 yuan per year to an average of 6,000 yuan per year, an increase of 15 times; The number of farmers engaged in the Chenji Yam industry has increased from 700 to 20,000, an increase of 28 times. [Knowledge Link] Edible Method Chenji Yam is suitable for "steaming, boiling, boiling, frying" because of its high content of starch, polysaccharide and protein. It can prepare more than a thousand kinds of recipes. The most nutritious, health-care, basic eating methods are: boil: wash the soil with water, peel, cut into sections, into the pot to make a variety of porridge rice; or do not peel, boil water for 8-10 minutes, remove and eat. According to personal preferences, smoked sugar and honey. Steaming: Wash the soil, steam it for 8-10 minutes, ready to eat.煲: Wash the soil, peel the skin, cut the inch, according to personal hobbies, with a variety of meat, vegetables, spices foraging. Storage method In late October, the new yam will be listed in the end of March of the next year. It can be stored in a cool and ventilated place at room temperature. From the beginning of April to October, it should be stored at 4-6 °C under constant temperature. If it is separated from this condition, the shelf life is 7 -10 days. See, the appearance of the appearance is consistent with Chen Ji yam slender, round, straight, skin brown, which is the brown skin of the chicken skin, the characteristics of the epidermis hair follicles prominent. Look, whether the packaging has the GI GI logo. Hey, pick up a yam by hand, you should have the feeling of picking up an iron bar, swinging up and down, the chicken skin will not break. Pinch, pinch with your thumb and forefinger, not broken, otherwise it is fake.

Chenji yam quality technical requirements (a) variety. Xi Shi seeds, chicken skin is rough. (2) Site conditions. The soil texture is from loam to sandy loam. The soil organic matter content is 0.8% to 1.2%, the soil pH is 6.8 to 7.4, and the soil thickness is ≥1.5m. (3) Cultivation technical requirements. 1. Site selection: It is necessary to choose a plot that has not been planted with yam for two years. 2. Soil preparation: Apply organic fertilizer 45 to 75 tons/ha, grooving and leveling, ditching or drilling (eye hole diameter ≥6cm), depth 130cm to 150cm. 3. Seedling treatment: (1) Seed selection: Select a disease-free robust plant with a length of ≥ 20 cm or cut a strong yam into 15 to 20 cm root segments. (2) Sun-breeding: 7 to 10 days after planting, and 15 to 20 days after rooting. (3) Germination: It should be germinated before planting, and planted when the bud grows to 1cm to 1.5cm. 4. Planting: (1) Planting time: April 1st to 15th (2) Planting density: less than or equal to 67,500 plants per hectare. 5. Field management: (1) sparse shoot: each plant leaves a strong shoot. When the tip length is 20cm to 30cm, keep a strong shoot and the rest are sparse. (2) Rack: The height of the frame is ≥80cm. (3) Fertilizer and water management: twice top dressing, application of NPK compound fertilizer, nitrogen application rate does not exceed 150 kg per hectare in the whole growing season. The rainfall from March to June is not less than 120mm, and the rainfall from July to September is not less than 300mm. Watering is not allowed. Water is drained during the rainy season and no water is allowed in the field. 6. Environmental and safety requirements: The use of pesticides, fertilizers, etc. must comply with relevant national regulations and must not pollute the environment. (4) Harvesting. Harvesting will take place from October 20th to March 20th. (5) Quality characteristics. 1. Sensory characteristics: variety appearance texture taste (cooked with water) root hair strips epidermis Xi Shi seeds thin short round straight yellow hard solid surface, sweet, fragrant, cool chicken skin thick thick long straight brown yellow with chicken skin hair follicle point solid surface , sand, incense, cotton 2. Physical and chemical indicators: variety length (cm) middle diameter (cm) dry matter (%) protein (%) starch (%) soluble total sugar (%) zinc (mg / kg) selenium (ug / g) Xi Shi seeds 30-602-3.5≥24≥3.2≥16.3≥1.5≥5≥10×10-3 chicken skin roughness 40-802-3≥24≥3.2≥16.3≥1.3≥5≥9.0×10-33. Safety Requirements: Product safety indicators must meet the relevant regulations of the state for similar products.

Apply to：
Producers within the scope of protection of Chenji yam GI products may apply to the Dingtao County Quality and Technical Supervision Bureau of Shandong Province for the use of the “Special Mark for Geographical Indication Products”, which is approved by the General Administration of Quality Supervision, Inspection and Quarantine.