1. Apply sweetened fertilizer. Use 0.75kg of saccharin, add appropriate amount of water to dissolve and boil, soy beans continue to cook for 3 hours, so that the sugar infiltrates into the expanded soybeans to make saccharin beans, and then mix with 10kg wheat bran, 10kg rice bran, 0.5kg diammonium phosphate, 18kg grass ash and mix well. That is to become a sweet fat. When the female flowers of watermelon are open, 0.2-0.25kg per hole is applied, which can increase the sugar content of watermelon by more than 40%.
2. Chasing vegetable oil. When the watermelon grows to the size of the fist, use a 1.5cm diameter wooden stick to dig a 12cm deep hole 2cm away from the main root, then drop 3-4 drops of vegetable oil, then seal it with soil, and pour it for 3-5 days. Once water, the sugar content of watermelon can be increased by more than 10%.
3. Apply watermelon. This method can make the emergence period 1 day earlier, the emergence rate increased by 10%, the sitting rate increased by 7-10%, the yield increased by 7-15%, and the sweetness increased by 0.7 degrees. The method is as follows: using watermelon 200-300 times liquid, spraying the leaves in the seedling stage, the sitting period and the expansion period of the watermelon.
4. Apply organic fertilizer. Watermelon sits on the melon for about 1 week, and digs a hole 10 cm away from the main stem. Each chicken, rabbit dung or cow dung and cake fertilizer are 50 g each, and water is sealed after sealing.
5. Spray superphosphate. Use 1.5-2kg of superphosphate, stir 10kg of water, stir evenly, let stand for 24 hours, take clear liquid, spray 1-2 times after watermelon fruit setting and bowl size, generally increase yield by 8%, sugar content can be increased 0.6-0.8%.
6. Spray potassium dihydrogen phosphate. When the watermelon grows to the size of the egg, a 0.3% aqueous solution of potassium dihydrogen phosphate is sprayed once every 7 days to increase the yield by 10-20% and the sugar content by 0.5-1.5 degrees.
7. Spray grass ash. Use fresh grass wood ash 2.5-3kg flushing 50kg, stir well for 8-12 hours, take clear liquid spray on the leaf surface, can increase production by more than 10%, sugar content can be increased by 0.5 degrees.
8, look at the pulse to turn the melon. The melon should be carried out during the expansion period. Turn the watermelon along the melon and turn the top of the grain, that is, the direction of the melon vein, 180 degrees, flip it once every 7-8 days, and turn it twice. When you operate, hold the top of the melon with one hand and hold the melon tail with one hand. Lightly turn the melon. Turn over the melons to pay attention to the following two points: First, it should be carried out at noon on a sunny day or in the evening to prevent the leaves from falling. The second is to turn the melon in the same direction every time, and never twist it strongly. It is better to turn 1/3 of the melon face every time.
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