Xiangshan pressure sand watermelon, known for its health-care element “selenium”, is also known as “Zhongwei Selenium Sand Melon”, also known as “Gobi Watermelon” and “Watermelon Treasures Growing in Stone Sewing”. Thick, fleshy and refreshing, sweet and juicy.

Xiangshan crushed sand watermelon, with a large thick, fleshy and refreshing taste, sweet and sweet, rich in glucose, vitamins, amino acids and various trace elements, especially rich in health care element "selenium" is also known as "Zhongwei selenium sand" melon". It is named after it is native to the Xiangshan area of ​​Zhongwei City and is based on sand-pressing technology. In addition to the local special precipitation, light, temperature difference, soil conditions, the watermelon produced is not only large and sweet, but also thick and hard, resistant to storage and transportation, and the natural preservation period is more than 50 days. Product Features Selenium sand melon is also known as "Gobi Watermelon" and "Watermelon Treasures Growing in Stone Sewing". It is mainly produced in the Huanxiangshan area of ​​Zhongwei City. It has a drought in ten years and an average annual precipitation of less than 200 mm. Evaporation Then it is more than 2000 mm, and it is almost "not long." In this harsh environment, farmers in the city have gradually explored a set of methods for pressing sand and growing melons. Pressing stones on the sand can reduce the evaporation of water during the day, and the water vapor can be condensed into water at night to infiltrate through the rocks. Sand-pressing land can not only store water, protect moisture, heat insulation, but also increase nutrition for crops, avoid water erosion, wind erosion and reduce soil erosion. Through the sand pressing, the dry sand land that did not have the value of use has become a treasure land for planting watermelon. Nutritional value Sand-pressed melon can be thick, easy to transport, bright red flesh, rich in juice, sweet and refreshing, soothing and sweet, with a sugar content of 13.8%. The content of nutrients in melons is comprehensive and reasonable. Among them, there are 18 kinds of amino acids necessary for human body, 3 kinds of vitamins and 5 kinds of trace elements, including 56mg/kg of calcium and 1090mg/kg of potassium, especially selenium (selenium) which is necessary for human health care. The content reaches 0.0056mg/kg) and trace elements such as zinc, which has the functions of improving human immunity, anti-aging and anti-cancer. Zhongwei Xiangshan Watermelon does not use any chemical fertilizers and pesticides. It has been reviewed and monitored by the National Green Food Development Center. The product quality is in full compliance with the requirements of green organic food and is certified as green organic food. Planting Environment The Huanxiangshan area, which accounts for 1/3 of Zhongwei City, is located in the transitional zone between the Mongolian Plateau and the Loess Plateau. The annual precipitation is less than 180 mm and the evaporation is 2400 mm, which is one of the most arid areas in China. However, precipitation, light, temperature difference and soil conditions are the perfect environment for the growth of watermelon, and it is also the only area in China that is suitable for planting high-quality pressed sand melon. Historical origins As early as the beginning of the 20th century, farmers in the Xiangxiangshan area began to use this kind of characteristic melon pattern by using the stone gravel of the mountains. In the area of ​​the Xiangshan impact fan where the gravel is rich, a large amount of gravel is covered on the surface of the mountain, using the gravel. The production of watermelon and melon is produced by the pressure-saving, warming and moisturizing effects on the surface. The most direct effect of this is to reduce the desertification area of ​​the land and improve the land utilization rate. The unique light and heat resources at an altitude of 1600-1800 meters are natural glucose, vitamins, amino acids and various trace elements in the melon, especially in food. The accumulation of scarce selenium provides unique natural conditions. The large-scale pressed sand melon is planted in the alluvial fan area of ​​Zhongwei Xiangshan, which is rich in gravel and silt. It is planted every year from April to May and is listed in July-September. In the growing season, the sunshine hours are 1080 hours, the sunshine percentage is over 60%, the frost-free period is 153 days, the effective accumulated temperature is 2529.3 degrees, and the temperature difference between May and August is very large. “Before wearing a skinny coat, eating watermelon around the stove” It is a true portrayal of the climate characteristics of the region. In the past, due to lack of funds, inconvenient transportation, no policies, and forced by life, the masses spontaneously planted sporadicly, but only used sand-pressed melon as a sideline. When planting pressed sand melon, we must first put gravel on the wasteland. Due to the lack of transportation in the past, the investment in crushing sand melon is long, the benefit time is longer, and after many years of planting, it is in the 1970s. People have a jingle on pressing sand melons, "the bitter dead man, the rich and dead son, the dead grandson." However, with the continuous improvement of the planting level, the gradual expansion of the planting area, and the further resolution of the water source, the level of mechanized equipment has been improved, and the labor level has been significantly reduced. In the 1990s, the pressed sand melon entered a stage of rapid development.

Technical requirements for quality of Xiangshan pressed sand watermelon (1) Site conditions. The altitude is 1200m to 1800m, the slope is ≤25°, the soil type is limestone or sandy loam, the thickness of soil layer is ≥80cm, the mixture of gravel sand is 10cm to 15cm (the ratio of gravel/sand is 10:1), the soil organic matter content ≥ 0.6%, no pollution source. (2) Variety. "Jincheng No. 5" and other mid-late maturity, thick skin, storage and transportation, elliptical flower skin large fruit watermelon. (3) Cultivation management. 1. Soil management: For the arable land determined to be crushed sand, it should be ploughed 3 times before the sand pressing, the depth of ploughing is 22cm to 33cm, and the high-quality rotted farmyard manure is ≥1000kg per 667m2 (mu), and then crushed and planted in the next year; Old sand, after harvesting shallow tillage, loose sand, and weeding, fertilizing. 2. Seed treatment: warm soup or medicinal soaking. 3. Sowing: In mid-April, the temperature of the surface of the sand-pressed soil is 10cm and the temperature is stable at 15°C or above. Adopting a mulch or a layer of film “dislocation” planting, planting ≤3750 plants per hectare. 4. Field management: (1) Seedling management: sand film mulching, ventilating the seedlings in the heart of the watermelon seedlings 2 leaves, the temperature in the film exceeds 35 ° C, to prevent the lengthening, burning seedlings, rupture time before 10:30 in the morning . And time seedlings, artificial or mechanical weeding. (2) Remaining melon: not pruning, the melon is mainly the second or the third female flower, especially in the 10th position. (4) Harvesting. Harvesting period: from late July to late August. (5) Quality characteristics. 1. Sensory characteristics: The fruit has an elliptical shape, the base of the peel is light green, and the green cloth is covered with a dark green strip. The fruit is pressed with a gravel pad on the ground, and the single melon weighs more than 5 kg. The flesh is bright red and crisp; the seeds are dark brown, the skin is tough, and the thickness is 10mm to 15mm, which is resistant to storage and transportation. 2. Physical and chemical characteristics: the average sugar content is 11.9%, the average sugar content is 10.2%, the sugar content gradient is 1.7% average, calcium is ≥50mg/kg, potassium is ≥1.09g/kg, zinc is ≥0.36mg/kg, selenium≥0.0056 Mg/kg, vitamin C ≥ 250 mg / kg, aspartic acid ≥ 3.14 g / kg, total carotene ≥ 1.72 g / kg.

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The producers within the scope of protection of Xiangshan pressed sand watermelon geographical indication products may apply to the Quality and Technical Supervision Bureau of Zhongwei City of Ningxia Hui Autonomous Region for the use of “Special Marks for Geographical Indication Products”, which shall be approved by the General Administration of Quality Supervision, Inspection and Quarantine.