Kazi walnut is a geographical indication protection product, mainly produced in Li County, Aba Prefecture, Sichuan Province. Its characteristics are large, thin shell, thick and thick nuts, high oil content, mellow taste, and the name of Luren walnut. Kazi walnut also has the functions of strengthening the stomach, enriching the blood, moistening the lungs, nourishing the gods, and has rich nutritional value.

Kazi walnut, as a natural and nutritious natural nutritious food, has been cultivated for hundreds of years. It has sexual warmth, sweet taste, non-toxicity, and has the functions of strengthening stomach, nourishing blood, moistening lungs and nourishing the gods. It is characterized by large fruit, thin shell, thick and thick nuts, high oil content, mellow taste, and the name of Luren walnut (according to "Li County"), the quality is better than other producing areas. Morphological characteristics Deciduous trees, generally up to 3-5 meters, bark gray-white, shallow longitudinal fissure, medullary lobes, young apex puberulent (2-year-old branches often hairless). The pinnate compound leaves are 25 to 50 cm long, 5 to 9 are small leaves, and 13 are rare. Oval ovate to elliptic, terminal lobes usually larger, 5 to 15 cm long, 3 to 6 cm wide, apex acute or acuminate, basally round or cuneate, sometimes heart-shaped. The whole edge has a non-obvious blunt tooth, the surface is dark green, no hair, only the veins on the back are slightly hairy, the petiole stalk is very short or absent, some shells are hard and some are soft. Inflorescences are 5 to 10 cm long, male flowers have 6 to 30 stamens, 萼 3 lobes, 1 to 3 female flowers, 2 styles, reddish. In the flowering period of May, the male inflorescences hang down, about 5-10 cm long and 15 cm thin. The bracts, bracteoles and perianth segments of male flowers are glandular hairs. Stamens 6-30, anthers yellow, glabrous. Female spikes usually have 1-3(-4) female flowers. The total sputum of the female flower is very short glandular hair, and the stigma is light green. The fruit is elliptical, about 5 cm in diameter, gray-green. Glandular hairs when young, hairless when old, inner nut spherical, yellow-brown, irregularly fluted on the surface. Product Features Kazi walnut is produced in the lower reaches of Lixian County. It has large fruit, thin shell, thick and thick nuts, high oil content and mellow taste. It is known as Luren walnut. From the appearance, the fruit of the walnut is oval and round. The fruit surface is smooth, the suture is low, the white is white, and the nucleolus is full. The weight of dried fruit is ≥12g, the kernel yield is ≥40%, the crude fat content is ≥63%, and the crude protein content of the kernel is ≥11%. Nutritional effect Walnut is warm, sweet and non-toxic. It has the functions of strengthening stomach, nourishing blood, moistening lungs and nourishing the gods. It often eats pecan kernel products, has spleen appetizer, moisturizing and strengthening kidney, nourishing and recovering, preventing coronary heart disease and lowering blood lipids. The effect. It is a healthy and nutritious natural green nutritious food. The nutritional value of the flesh is very rich. Pecan nuts contain 7.8-9.6% protein, more than 7 kinds of essential amino acids, and the content is up to 25%. It also contains 22 kinds of mineral elements, calcium and magnesium with high nutritional value. Phosphorus, zinc and iron are very rich in content.

Technical requirements for the quality of the nut of the crab. I. Variety Local native walnut varieties. 2. Site conditions The altitude of the production area is 1400m to 2200m, the soil type is sandy loam, the soil organic matter content is ≥3%, and the soil pH is 7.5-8. The annual average temperature is 6.9 °C to 11 °C, the annual rainfall is 480mm to 800mm, and the average annual sunshine is 2266 hours. Third, cultivation techniques 1. Seedling: Grafting and breeding with local walnut seedlings as rootstocks. 2. Planting: The planting time in spring is in the middle and late March, and the planting time in autumn is from late October to early November. The planting density is ≤330 plants/ha. 3. Plastic trimming: The trunk is layered and the tree body is ventilated and transparent. 4. Fertilization: Mainly based on decomposed organic fertilizer, the amount of fertilizer applied: ≥20Kg per organic fertilizer applied in the sapling stage, and ≥50Kg per organic fertilizer in the fruiting stage. 5. Watering: Ensure that each watering is done once before germination, during fruit development, before fruit ripening, before the soil is frozen, and other times depending on the situation. 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 Before and after the white dew, the green peel turns from green to yellow, and some of the peels are cracked at the top, and the inner folds are blackened and harvested. V. Quality Features 1. Sensory characteristics: From the appearance, the fruit is oval and round. The fruit surface is smooth, the suture is low, the white is white, and the nucleolus is full. 2. Physical and chemical indicators: dried fruit single fruit weight ≥ 12g, kernel yield ≥ 40%, crude fat content ≥ 63%, seed crude protein content ≥ 11%. 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 the production of Kazi walnut can submit an application for the use of the “Special Mark for Geographical Indication Products” to the Quality and Technical Supervision Bureau of Lixian County of Sichuan Province. After being examined by the Sichuan Provincial Bureau of Quality and Technical Supervision, it will be announced after approval by the General Administration of Quality Supervision, Inspection and Quarantine. The detection mechanism of the nut is selected by the Sichuan Provincial Bureau of Quality and Technical Supervision in a testing institution that meets the qualification requirements.