Zhangzhou walnut is a walnut genus of deciduous family, deciduous tree, germinated every year in late March, flowering in late April, and matures one week after the beginning of September. The tree is strong, the branches are thick, the crown is semi-circular, the tree is tall and the branches are beautiful, the shade is cool and the fragrance is fragrant, and the life span can reach four or five hundred years. Representative varieties include Dalongyan (Jinlong No.1), Xiaolongyan (Jinlong No.2), Zhonglin No.1, and Weinan No.3. Judging from the spore powder analysis of the geothermal data of the Fuyang and the distribution of walnuts in the existing rocky mountain areas, the cultivation history is about 2000 years.

Fuyang City is located in the hinterland of Shanxi Province, west of Luliang Mountain, Dongpu River, and across the east longitude 111°26'-112°00'22u0026quot;, north latitude 37°08'44u0026quot;-37°29'10u0026quot; It is an ideal production area for high-quality walnuts in China. In addition, it is located in the eastern foot of Luliang Mountain, on the western margin of Taiyuan Basin. It gradually decreases from northwest to southeast. It receives unique light and has an average annual frost-free period of 157 days. Liyang is in the Loess Plateau and the soil is mountain cinnamon soil. , leaching cinnamon soil and coarse bone cinnamon soil, suitable for forest growth, providing a good geographical advantage for Zhangzhou walnut. Fuyang City is a temperate continental monsoon climate with four distinct seasons. The terrain gradually decreases from northwest to southeast. There are mountains, hills and plains in turn, with an average altitude of 1414.3 meters. The unique high altitude, less precipitation and sufficient light are the walnuts of Zhangzhou. Growth provides a superior climate advantage. Zhangzhou walnuts are mainly distributed in more than 20 towns and towns adjacent to the two cities of Xiangyang and Xiaoyi. The shape of Zhangzhou walnut fruit is pleasing, large, thin, high in kernel rate, light in color, crispy and delicious. Quzhou walnut is rich in nutrients. In addition to rich fat, protein and carbohydrate, walnut kernel also contains more trace elements such as calcium, phosphorus and iron. It can be used as raw food or as a food industry such as cakes, candies and cans. Raw materials are a nourishing good for both young and old. Long-term consumption, with qi and blood, Runzhan phlegm, warming the intestines and lungs, cure cold, asthma, cough and other effects.

Zhangzhou walnut quality technical requirements (a) varieties. Big longan, little longan and good offspring. (ii) Site conditions. Within the protected area, the altitude is 700 to 1300 meters. The soil type is cinnamon soil. The soil is loam and sandy loam. The organic matter content is ≥1.0%, the pH value is 7.0 to 8.2, and the groundwater level is below 1.5 meters. (3) Cultivation techniques. 1. Nursery: Take the local walnut as the rootstock and collect the scion from the mother plant without quarantine pests and diseases for grafting and breeding. 2. Planting: Autumn planting is carried out after the leaves of the seedlings are frozen until the soil is frozen. The spring planting is carried out before the germination of the soil, and the planting density is ≤1245 plants/ha. 3. Plastic trimming: The branches in the crown are evenly distributed to ensure ventilation and light transmission. 4. Fertilization: Mainly based on farmyard manure, the annual fertilization amount is ≥3000kg/ha. 5. Environmental and safety requirements: The use of pesticides, fertilizers, etc. must comply with relevant national regulations and must not pollute the environment. (4) Harvesting. 1. Harvesting period: Harvesting begins when the green skin is cracked by one-third. 2. De-greening: After removing the green skin, the black fruit rate is ≤3%, and it is forbidden to use chemical immersion during the peeling process. (5) Quality characteristics. 1. Sensory characteristics: The fruit is even in size, nearly round, thin in shell, yellow-white in color, small in inner wall, easy to take kernels, full of kernels, slightly sweet. 2. Physical and chemical indicators: project indicators big longan small longan walnut transverse diameter, mm≥35≥35 average fruit weight, g≥12≥14 kernel yield, (%)≥58≥55 water content, (%)≤8.0≤8.0 Walnut kernel fat content, (%) ≥ 57 ≥ 57 protein content, (%) ≥ 15 ≥ 153. Safety requirements: product safety indicators must meet the relevant provisions of the state for similar products.

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Producers within the protection scope of Zhangzhou Walnut Geographical Indication Products may submit an application to the Quality and Technical Supervision Bureau of Zhangzhou City for the use of the “Special Mark for Geographical Indication Products”, which shall be approved by the General Administration of Quality Supervision, Inspection and Quarantine.