?Watermelon varieties include: Black Beauty, Jingxin, Fengguang, 8424, Xiaolan, Qilin King, Qilin, Xiao Qilin, Shuai Tong, Mo Tong, Xinong No. 8, Xin No. 1, Early spring ruby. Guo brand watermelon Guo brand is the registered trademark of Hongze Watermelon Breeding Farm in Weifang, Shandong. Guo brand watermelon has been planted for more than 20 years and is the earliest large-scale watermelon grower in East China. The brand was founded in 1993 and is one of the earliest fruit brands in China. Hongze Watermelon Breeding Farm is located in the suburbs, far away from pollution. The cultivated products all use organic fertilizers and advanced scientific planting methods to ensure maturity, green health and pollution-free. The breeding farm uses special technology to produce, and can be put on the market in April on the basis of ensuring maturity and sugar content. In July, a new crop of watermelons (grown in Xinjiang, the second largest base of Guo brand watermelons) will be harvested, and the sales period will last until October month. Cultivation characteristics: The seedling cultivation method is exclusively confidential, with physical insecticide, physical disease prevention, artificial moderate temperature difference control between morning and evening, all using ecological organic fertilizers, oxygenated water spraying, oxygenated fertilization, water control in stages, fertilizer control in stages, according to the different growth stages of watermelon. Need, targeted water spraying and fertilization, no pesticides and hormones are used, the two bases in Weifang and Xinjiang are far away from the city, and there is no modern industrial pollution. One vine and one melon are guaranteed, and only the first crop of melons are sold. Product Features Guo brand watermelon is a high-end natural drink that relieves summer heat and quenches thirst. It is rich in essential elements such as potassium, phosphorus, calcium, magnesium and a large number of vitamins, especially vitamins, which play an important role in maintaining the normal function of the human hematopoietic system and eliminating the harm of other substances and toxins to the human body. It has an auxiliary therapeutic effect on diseases such as severe heat disease, heart-heat irritability, wind-fire toothache, tongue sores in children, liver-fire kidney deficiency and hypertension. ?Basic introduction to Kaifeng watermelon. The familiar name Bianliang watermelon is a traditional specialty of Kaifeng. It is well-known in ancient and modern times and sells well both at home and abroad. Its characteristics are: thin skin, juicy, crispy and sweet scoop of sand, clear and delicious. There is a folk saying that "the pomegranates in Xiaoxian are as good as the pomegranates in Dangshan, and the pomegranates in Bianliang are as red as the skin". Because Kaifeng was called "Bianliang" in ancient times, everything produced in Kaifeng was called "Bianliang". The growing climate in Kaifeng is mild, with even rainfall in summer and sandy loam soil, which is suitable for growth. In addition, the people of Fancun Township in the southern suburbs of Kaifeng County have accumulated rich planting experience for a long time. They carefully cultivate and continuously improve it as a local treasure, making Kaifeng gradually become a famous specialty of Zhongzhou. ?Daxing Watermelon Daxing, Beijing, is known as the "Hometown of Watermelon in China", and "Daxing Watermelon" has long become a brand trusted by people in the capital. Daxing has a long history of watermelon cultivation. During the Taiping period of the Liao Dynasty, a thousand years ago, Daxing had a history of cultivating watermelons. Basic information The term watermelon was first seen in the book "New History of the Five Dynasties" (Appendix of Siyi) written by Ouyang Xiu of the Song Dynasty. More than 1,000 years ago, it was cultivated in Hebei Province and introduced to Beijing. Daxing is a famous watermelon main producing area and distribution center. About 400 years ago, during the Wanli period of the Ming Dynasty, Daxing watermelon was recorded as tribute. Daxing is located in the southeastern suburbs of Beijing, on the east side of the Yongding River. To the south of Tiangongyuan Village in Beizang Village Township, the 10 townships represented by Pangezhuang have relatively concentrated watermelon distribution areas and are the main producing areas of watermelons in the county. This area is located in flood plains and alluvial plains, and is mostly sandy soil. During the growing, flowering and setting stages of watermelon from May to July, the required optimum temperature is between 18-35°C, while the monthly average temperature here is 20-26°C, with the extreme maximum temperature above 35°C. The water demand of watermelon is about 47% of the total water demand in mid-to-late June, when the monsoon rains have arrived in the area. In addition, the temperature difference between day and night is large, and the daily temperature difference can reach more than 10°C during the watermelon growing season. Not only are the natural conditions here conducive to the growth of watermelons, but the agricultural technicians and thousands of melon growers have rich experience in melon growing technology. The watermelons produced are famous for being sandy, sweet and crisp, and are quite famous in Beijing and Tianjin. During the annual Watermelon Festival in Daxing District, melon farmers from various townships compete in the arena, attracting many Chinese and foreign guests. [1] Watermelon, known as the king of summer fruits, can not only relieve summer heat and quench thirst, but also has medicinal functions such as diuresis and diarrhea, treating sore throat, and detoxifying alcohol. Traditional Chinese medicine has also studied the use of watermelon to treat nephritis, edema, diabetes, jaundice and hypertension. [1] By adopting technical measures such as film covering, Daxing’s watermelons have been on the market for the first time, and the output and quality have been greatly improved. Daxing’s watermelon sales account for more than 50% of the city’s watermelon sales.

Daxing's main watermelon variety, Jingxin No. 1, is a watermelon inbred line provided by the Beijing Academy of Agricultural and Forestry Sciences Vegetables. After three years of local trial planting, it has won first place in Beijing's watermelon evaluation meetings many times since 1986. After identification, the yield per mu of Jingxin No. 1 watermelon can reach 3,500-5,000 kilograms. It is characterized by a smooth appearance, round fruit shape, and 16-17 obvious dark green snake lines on a light green background. The skin is thin and tough, the flesh is bright red and soft, the meat is crisp and sandy, with less fiber, no holes, and no loose flesh. A single melon weighs 4-5 kg ??and has a sugar content of 10-13%. Sweet in taste and good in quality, it is a mid- to high-grade variety. It is widely cultivated, has a high fruit setting rate, is suitable for traditional cultivation in Beijing, and has high commercial value [1]. Only watermelons that meet the conditions of having a rind thickness of no more than 1.2 centimeters and a weight of no more than 8 kilograms and produced in Daxing can be called "Daxing watermelons." Yesterday, the Municipal Quality Supervision Bureau’s website solicited opinions from the public on the national standards for “Daxing Watermelon”. This standard provides a detailed "definition" of the origin range and varieties of Daxing watermelon to protect the "Daxing Watermelon" brand. The national standard of "Geographical Indication Product - Daxing Watermelon" clearly stipulates the varieties, regional environmental characteristics, cultivation techniques, quality requirements, physical, chemical and hygienic indicators of Daxing watermelon. Daxing watermelon varieties are limited to Jingxin No. 1, Jingxin No. 2, Jingxin No. 3 and Hangxing No. 1. Nutritional value: Watermelon, also known as water melon, cold melon, and summer melon, is called the "King of Melons". Because it was introduced from the Western Regions in the Han Dynasty, it is called "watermelon". Watermelon is sweet and juicy, refreshing and thirst-quenching. It is a great fruit in midsummer. In addition to being free of fat and cholesterol, watermelon contains almost all the signature nutrients needed by the human body. It is the most nutritious, purest and safest food. [3] Efficacy Watermelon can clear away heat and relieve summer heat, relieve restlessness and quench thirst. Watermelon contains a lot of water. When you have an acute fever, have a fever, are thirsty and sweaty, or are irritable, if you eat a piece of sweet, sandy, watermelon, your symptoms will improve immediately. In terms of treating nephritis and lowering blood pressure, watermelon can be regarded as a good doctor among fruits and vegetables. The sugar and salt it contains can diuretic and eliminate kidney inflammation; protease can convert insoluble protein into soluble protein, increasing nutrition for patients with nephritis; it also contains substances that can lower blood pressure. After eating watermelon, the urine output will increase significantly, which can reduce the content of bile pigments and make the stool unobstructed, which has a certain effect on the treatment of jaundice. Fresh watermelon juice and tender melon rind can increase skin elasticity, reduce wrinkles and add luster. Therefore, watermelon not only has good edible value, but is also an efficient and economical beauty salon for ladies. If you want to become radiant, don’t let watermelon go. [3] Applicable people: Most people can eat it. It is more suitable for people with nephritis, fever and beauty enthusiasts. [3] Applicable dosage is 200 grams per day. [3] Special reminder that watermelon is a summer fruit and should not be eaten in winter. Seasonal rules should be followed. Don't eat watermelon fresh out of the refrigerator. [3] Precautions Watermelon contains high sugar content, so people with diabetes should eat it with caution. Watermelon is cold, and excessive cold stimulation will weaken normal gastric motility and affect gastric function. Therefore, people with spleen and stomach deficiency, indigestion, and gastrointestinal diseases should not eat too much at one time, otherwise a large amount of water will enter the stomach, dilute gastric juice, cause indigestion, and reduce gastrointestinal resistance. Patients with heart failure or nephritis should not eat more watermelon to avoid increasing the burden on the heart and kidneys and aggravating the condition. The weak should not eat it before the summer solstice and after the beginning of autumn. [3] Geographical indication products According to the "Regulations on the Protection of Geographical Indication Products", our office organized a review of the application for protection of Daxing Watermelon geographical indication products. After passing the review, it is now approved to implement geographical indication product protection for Daxing watermelon from now on. [4] Protection scope of Daxing Watermelon Geographical Indication Products The scope of protection is based on the scope proposed by the Beijing Daxing District People’s Government on Defining the Protection Territory Scope of Daxing Watermelon Geographical Indication Products (Jingxing Zhengwen [2006] No. 10), which is Six towns, including Pangezhuang Town, Beizangcun Town, Lixian Town, Yufa Town, Weishanzhuang Town and Anding Town, are currently under the jurisdiction of Daxing District, Beijing. [4] Quality and technical requirements (1) Variety. There are four medium-fruit watermelon varieties suitable for growing, including Jingxin No. 1, Jingxin No. 2, Jingxin No. 3, and Hangxing No. 1. (2) Site conditions. Sandy soil without heavy metal pollution has a pH value of 6.0 to 8.5 and an organic matter content of not less than 1.0. (3) Cultivation management.

1. Watermelon grafting and seedling cultivation: Use cucurbit rootstocks. The grafted seedlings should have 3 to 4 true leaves when they emerge from the bed, and the scion should not be leggy; the leaves should be dark green in color and free of diseases and insect damage; the stem base should be strong and the root system should be developed. 2. Land preparation and fertilization: Apply no less than 45 tons of fully decomposed organic fertilizer per hectare, N: 300 to 360 kg; P2O5: 190 to 220 kg; K2O: 120 to 180 kg. 3. Planting: The planting period is from late March to late April, and the planting density is 9,000 to 12,000 plants/hectare. 4. Water and fertilizer management: Pour expanded melon water when the watermelon fruit grows to the size of an egg, and apply N: 60 to 75 kg and K2O: 75 to 110 kg per liter of water. Stop watering one week before picking melons. 5. Pruning: Three-vine pruning, except for the main vine, keep two lateral vines at the base, and select one melon on the second or third female flower. 6. Pollination: Select normally open male flowers from 7:30 to 10:30 am and conduct artificial pollination of female flowers. (4) Harvesting. 1. Harvest period: From the time when the female flowers bloom to when the fruit matures, the effective accumulated temperature is 700°C to 900°C, which takes about 28 to 30 days. When mature, the peel is hard and smooth, with the inherent skin color of this variety, and the umbilicus and pedicle are sunken and shrunk inwards. 2. Harvesting technical requirements: When picking melons, there should be a section of melon vine on the fruit; harvesting on rainy days is prohibited; harvesting should be done in the evening during high temperature seasons; melons should be handled with care during picking and shipping. (5) Quality characteristics. 1. Sensory characteristics: (1) Fruit shape: medium fruit shape, round or highly round; (2) Single melon weight: 4 to 8 kg; (3) Peel: The peel is thin and crisp, with a thickness of no more than 1.2 cm. The color is a green base covered with dark green strips; (4) Flesh color: pink to peach, bright color; (5) Texture and flavor: Crispy melon flesh, sweet and juicy, low fiber content, refreshing. 2. Physical and chemical indicators: (1) Soluble solid content: the center is not less than 11; the edge is not less than 8; (2) Sugar-acid ratio: 45 to 50; (3) Lycopene: not less than 3.0㎎/100gFW ; ?