Puning Qingmei, the production area is the administrative area under the jurisdiction of Puning City, Jieyang City, Guangdong Province. There are more than 10 fine varieties of Puning green plum, among which the fine varieties of the main planting species include soft-branched large-grain plum, Daqingmei, Baifenmei, Huangzhimei, soft-leaved Wumei, Qingzhumei, soft-branched Daqingmei and Dwarf plum varieties. Puning green plum is famous for its large fruit, thick meat, small nuclear and high acidity; the skin is flexible, not easy to break, soft meat, high drying rate, bright color and long color retention period. It is well-known at home and abroad.

Puning Green Plum Quality Technical Requirements (1) Site conditions. Within the protected area, the slope is below 25°, the hills and mountains with sufficient light, the soil texture is sandy loam, and the pH is 5.5 to 6.5. (2) Cultivation management. 1. (2) Seed selection and treatment: Select the fruits of Qingzhumei, Huangmei and other varieties. After fully ripening, the seeds are taken out, and the seeds are cleaned, dried, and sanded, and planted from late November to early December. (3) Seeding and transplanting: After sowing, when the seedlings are as high as 6cm to 8cm, they are transplanted in separate beds. (4) Grafting management: When the rootstock of the rootstock is thicker than 0.6cm, it will be grafted from late December to early January. The grafted scion should be harvested from the pure and strong-growing maternal tree of the variety. The vegetative shoots are cut by single buds. (5) Seedlings out of the seedlings: It is advisable to plant the plants in the middle and late November of the next year. 2. Excavate the planting hole and apply the base fertilizer: excavate the planting hole according to the row spacing of 4m×5m. The size of the planting hole is 0.8m×0.8m×0.8m, the green manure is buried, and the base fertilizer is applied. 3. Choose the fine seed and match the pollination tree: choose the soft-branched big-grain plum and Daqingmei as the main plant variety, and the white powder plum and dwarf white plum are excellent pollination varieties. The varieties are matched: the main varieties account for 70% to 80%, and the pollination varieties account for 20% to 30%. 4. Fertilization: (1) Fertilization of juvenile trees: Young trees are fertilized once in the sprouting of the new shoots and in the greening stage of the leaves, mainly organic fertilizers. Before the germination of the new shoots, 25 kg of soil-fertilizer or 0.25 kg of bean cake, with phosphorus, Potassium, calcium and magnesium fertilizers are applied. (2) Result tree fertilization: The result tree is fertilized, and the key application is pre-flowering fertilizer, strong fruit fertilizer, fruit-harvesting fertilizer, and strong-leaf leaf-preserving flower bud differentiation fertilizer. (3) Baoye Baohua Bud Differentiation Fertilizer: Apply once a month from June to September, and apply 0.1kg to 0.2kg per compound fertilizer. 5. Plastic pruning: The young tree is formed into a natural happy crown in 2 or 3 years. As a result, the tree pruning is carried out "two cuts a year", the summer shears are completed within 15 days after harvesting, and the winter shears are carried out before the buds from November to mid-December, and 1/4 or 1/3 of the long branches of more than 30 cm are cut. In order to promote vomiting, short fruit branches, cut off dead branches, diseased insects, and remove excessive dense branches to ensure that the plum trees are ventilated and light. 6. Environmental and safety requirements: The use of pesticides, fertilizers, etc. must comply with relevant national regulations and must not pollute the environment. (3) Harvesting. The harvest period is from mid-April to early May. Fruits should be harvested in batches and batches, so that they can be harvested in full, first harvested first, and lightly handled. (4) Processing. 1. Pickling: (1) After picking fresh fruit, it should be marinated on the same day. (2) Classification by classifier, which is divided into extra large (LL), large (L), intermediate (M), and small (S), and then marinated according to different levels. (3) After the washing and grading, the plum fruits are delivered to the pickling pond, and the plum fruit is added, and the salt is evenly added. The salt standard is added: 100kg plum fruit and salt is 26kg to 28kg. (4) Pickling time: more than 60 days. 2. Sun drying: (1) Pick up the pickled plums and put them in the greenhouse for 3 to 5 days. (2) Turning the fruit. The fruit is gently turned by hand to ensure that the plum fruit is evenly exposed, and the fruit is turned once in the morning and afternoon, when the plum fruit is dried to a moisture content of 60% to 62%. (5) Quality characteristics. 1. Sensory features: Grade A grade B grade color thin and thin skin, bright, shiny, even and good, light yellow flesh thick thin, shiny, still uniform, light yellow or brown, allow a small amount Light brown. The shape of the fruit is round, the fruit shape is rounder, the fruit surface is free of plum gum and ruptured fruit, the spotted plum gum and the broken fruit are no more than 3%, and the spot area does not exceed 1/62 of the peel area. Index: Item level specification Defective fruit (%) Moisture (%) Fruit (grain/kg) grade difference (%) Grade A LLLL ≤ 50 ≤ 5 ≤ 1060-62A grade LLL ≤ 51-65 ≤ 5 ≤ 10A grade LL66-90 ≤ 5≤10A grade L91—140≤5≤10A grade M141—220≤5≤10A grade S221-400≤5≤10B grade Tongzhuang (fruit surface is allowed to have spots)≤10C grade except A grade and B grade 3. Safety requirements: Product safety indicators must meet the relevant regulations of the state for similar products.

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