1. How to grow watermelon

Seed selection: if you want a high yield of watermelon, you should choose full, mature and robust watermelon seeds. After being selected, it is soaked in warm water at 55 degrees Celsius, which has the effect of sterilization. Then disinfect with a small amount of chlorothalonil solution, and then air dry it

Sprouting: watermelon needs to be soaked and sprouted before sowing. First soak and wash the seeds in warm water, then wrap them with wet and tight gauze and put them in a sunny environment for two or three hours. Then cover it with a layer of wet cloth and put it into a 30 ℃ incubator. After waiting for 36 hours, the seeds will germinate

Soil preparation: the soil should be humus rich soil with good drainage and air permeability. A small amount of compound liquid fertilizer can be added and then mixed well. Then water it enough to keep the soil moist

Sowing: put the seedlings into the nutrient soil, lay the seeds flat on the soil, let the bud end down, and then cover it with a layer of soil layer of about two centimeters. Then cover the flowerpot with a layer of plastic film and leave a few small holes for ventilation

Water and fertilizer: after the seedlings are planted, they can be watered once a day, but the water volume should be controlled as long as the soil is wetted. When the seedlings are about 40 to 60 cm high, the watering frequency can be reduced. Watering can be done every two or three days on average, but pay attention to watering thoroughly. Loosen the soil for each watering. In terms of fertilization, urea solution can be applied every three or four weeks, and compound fertilizer solution can be added during fruit setting

2. Role of watermelon

Quench thirst and relieve summer heat: watermelon contains a lot of water. People can quench thirst and relieve summer heat by eating some watermelon when they are thirsty and sweating in summer. Eating watermelon when people are upset can also relieve their mood and improve their mood

Treatment of jaundice: watermelon has high water content, which will increase the frequency of urination after eating. It can reduce the content of bile pigment in the human body, make the stool unobstructed, and help to treat jaundice

Moisturizing skin: watermelon contains many cosmetic chemicals such as citrulline, glutamic acid and phosphoric acid, as well as rich vitamins, minerals and other elements, which can enhance the physiological activity of the skin, improve the skin state and moisturize the skin after being absorbed by the skin

Treatment of throat and oral inflammation: watermelon cream made of watermelon as the main raw material has the effect of diminishing inflammation and swelling in the treatment of oral ulcer and sore throat. Therefore, eating watermelon often helps to treat such problems