The hustle of the paradise mountain, the majestic 澜沧 of the Lijiang River, the unique aura of the peaks and the green mountains and the mists swaying the mountain, nourishing the eternal aura, bred the Changning walnut shell thin, the seeds are full, the kernel rate is high, the taste is good, the flavor is strong, the nutrition Rich and unique quality features.

Changning walnut has a cultivation history of more than 3,000 years. According to relevant experts, there is a large area of ​​the original iron walnut forest (genus Walnut walnut) in the Nujiang and Minjiang river basins. According to the analysis of walnut specimens collected from our county, the walnuts in the territory can be divided into three types: iron walnut, quilted walnut and foamed walnut. Each has many varieties, but almost all the walnut varieties can be found in the iron walnut type. At the same time, there are both wild species and primitive forests of the genus Walnut, and there are many varieties of walnuts and natural distribution of relatives. This is the evidence of the origin of walnuts. In the county of Wandian, Lishui, Sitong, Weng block, Ke Street and other places have a large number of wild walnut forest distribution, you can initially confirm that Changning County is one of the origin of walnut. According to the "Nanxun Tongji", the story of Duan Siping's splitting of the Dali state in the Song Dynasty: (Duan Siping) will be a soldier, a businessman will be left with a walnut, and Siping will take the big one, with the word "green". After the demolition: "Qingzi is December, the word is 21, is it that I am Wang Ye on December 21?" From the "section" (not "砸") and The word is removed from the veins of Ren, and the walnut shell is relatively thin. It is inferred from this local historical data that as far back as the millennium of the Song Dynasty, Dali had used walnuts as a commodity, so Changning, which belongs to the Yongchang Prefecture of the Dali River in the Lancang River Basin, should be one of the main producing areas of walnuts. At the beginning of the Ming Dynasty, Xu Xiake wrote in the "Travel Notes" when he passed through Shun Ning: "The food in the county is burned with walnut oil. The walnut shell is thick and the meat is embedded, and the money can be counted, the cone is steamed, and the hoop is made into oil. The sesame seeds and the colza are many." It can be seen that there were many walnuts in the Shun Ning area at that time, not only a large amount of food, but also the burning of walnut oil. According to the book "Afforestation Techniques of Major Tree Species in China", walnuts are distributed in southwestern China, Yunnan Province, Guizhou Province, and Xichang, Sichuan Province. In Yunnan, it is mainly distributed in Baoshan, Dali, Zhaotong, Chuxiong, Qujing, Linyi, Lijiang, etc., and Changning is the main producing area of ​​Baoshan walnut. It has been planted since ancient times. In Changning, there are not only ancient tea tree kings, but also many Four or five hundred years old trees are normal. In Wandian Township, there is a 500-year-old walnut tree king that is to be held by four people. Walnut, also known as walnut, is listed as the world's four major dried fruits together with almonds, cashews, and hazelnuts. In foreign countries, it is called "Hercules Food", "Nutrition-rich Nuts", and "Aphid Fruits"; The term "longevity fruit" and "treasure of the people". Its outstanding brain-building effect and rich nutritional value have been praised by more and more people. The fruit is rich in nutrients and delicious. Each hundred grams of walnut contains 15.4 grams of protein, 63 grams of fat, 10 grams of carbohydrates, 5.8 grams of crude fiber, 1.5 grams of ash, 119 milligrams of calcium, 0.11 grams of riboflavin, 0.32 milligrams of thiamine, and Nick. Acid 1.0 mg, as well as potassium, iodine and other trace elements; there are 669 kcal of heat. According to the "Compendium of Materia Medica", walnut can tonify qi and blood, moisten and dry phlegm, treat lungs and intestines, and is sweet and flat. It has certain curative effect on "warming kidney and lung, Dingchuan Huatan".

Changning walnut quality technical requirements First, the variety of fine walnuts and large foam walnuts. Second, the site conditions are within the range of 1500m to 2200m above sea level, the soil is yellow soil, yellow red soil, yellow brown soil, soil pH value 5.5 to 7.5, soil organic matter content ≥ 2.0%, soil layer thickness ≥ 60cm. Third, cultivation management 1. Seedlings: grafting and breeding with iron walnut seedlings as rootstocks. 2. Colonization: The planting time is from December to January, and the planting density is 120 to 150 plants/ha. 3. Fertilization: mainly organic fertilizer, the saplings apply ≥6.0 tons of decomposed organic fertilizer per hectare per year; the mature fruit fertilizer is ≥9.6 tons per hectare per year in the first fruit period; the decomposed organic fertilizer is applied per hectare per year in the fruit-bearing period ≥ 12.0 tons. 4. Plastic trimming: The branches in the crown are evenly distributed to ensure ventilation and light transmission. 5. Fresh fruit harvesting: When more than 1/3 of the whole plant is naturally cracked, it is harvested at the right time. 6. Environmental and safety requirements: The use of pesticides, fertilizers, etc. must comply with relevant national regulations and must not pollute the environment. Fourth, processing 1. De-greening: on the day of harvest can not peel, and timely peeling after stacking. 2. Dry: Dry or dry until the nut moisture content is ≤ 8%. V. Quality Features 1. Sensory Features: Variety of fruit-shaped shell surface characteristics Shell color seed color color mouthfeel large bubble walnut flat spherical stitching tight, fine grained, light yellow brown brown yellow white flavor, astringent light and delicate fragrant walnut near circle The spherical suture is tight, the grain is thick, the shade is yellowish brown, the light yellow and white is fragrant, and the fine sputum 2. Physical and chemical indicators: variety single fruit weight (g) shell thickness (mm) kernel yield (%) fat content (%) protein content (%) Large foam walnut ≥10.00.6～1.0≥55≥63≥15 fine fragrant walnut ≥8.00.5～0.9≥50≥65≥143. Safety and other quality technical requirements: product safety and other quality technical requirements must comply with relevant national regulations .

Apply to：
Producers within the scope of Changning walnut production area may apply to the Quality and Technical Supervision Bureau of Changning County of Yunnan Province for the use of the “Special Mark for Geographical Indication Products”, which shall be reviewed by the Yunnan Provincial Bureau of Quality and Technical Supervision and reported to the AQSIQ for approval. . The legal inspection agency of Changning Walnut is designated by Yunnan Quality and Technical Supervision Bureau.