First, the application of sweetening fertilizer. With 0.75 kg of saccharine, add appropriate amount of water to dissolve and boil, add 10 kg of soy beans and continue to cook three dry water, so that the sugar penetrates into the expanded soybeans to make the sweet bean, then with 10 kg of wheat bran, 10 kg of rice bran, 0.5 kg of diammonium phosphate, 18 kg grass ash mix and mix, that is, become sweetening fat. When the female flowers of watermelon are open, 0.2-0.25 kg per hole is applied. This method can increase the sugar content of watermelon by more than 40%. Second, topdressing vegetable oil. When the watermelon grows to the size of a fist, use a wooden stick with a diameter of 1.5 cm to dig a 12-cm-deep hole 2 cm from the main root, then add 3-4 drops of vegetable oil, and then seal it with soil, passing 3-5. Watering once a day can increase the sugar content of watermelon by more than 10%. Third, spray ethephon. One week before watermelon harvest, 200-300 mg/kg ethephon can be sprayed on the fruit surface to not only ripen but also increase sweetness. Fourth, the application of watermelon. This method can make the seedling period 1 day earlier, the emergence rate increased by 10%, the rate of cucumbers increased by 7-10%, increase production 7-21%, increase the sweetness of 0.7 degrees. The method is: using 200-300 times of watermelon melon, three times foliar spraying in watermelon seedling period, sitting period and swollen period. Fifth, the application of organic fertilizer. Watermelon sitting about a week, dig a hole 10 cm away from the main stem, each chicken, rabbit feces or sheep manure and cake fertilizer each 50 grams, water after sealing the soil. Six, spray calcium superphosphate. Use superphosphate 1.5-2 kg, flush 10 kg and mix well, stand for 24 hours, take clear liquid 10 times, spray 2 times after watermelon is in fruit setting and bowl size, generally increase production by 8%, sugar content Can increase 0.6-0.8%. Seven, spraying potassium dihydrogen phosphate. In the size of watermelon eggs, with a 0.3% solution of potassium dihydrogen phosphate in water, spraying once every 7 days, can increase production by 10-20%, sugar content increased by 0.5-1.5 degrees. Eight, spray plant ash. Use fresh grass ash 2.5-3 kg flush 50 kg, stir and soak for 8-12 hours, take clear liquid spraying on the leaf surface, can increase production by more than 10%, sugar content can be increased by 0.5-1 degrees. Nine, see the pulse melon. Folding melons should be done later in the swell. The watermelon will be turned along the melon line above the direction of melon pulse 180 degrees, every 7-8 days flip 1 times, even 2 times, the operation to hold the top of one hand, guarana hand, hold both hands at the same time light Lightly tap melon. At the same time, you should pay attention to the following two points when turning melons: First, turn melons should be carried out at noon on sunny days or in the evening to avoid breaking cucurbits and vine leaves. The second is to flip melons in the same direction every time I turn melons, and I must never twist them, turning melons at 1/3 each time.
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