Watermelon high yield fertilization method

Watermelon grows rapidly, the fruit is large, the yield is high, and the amount of fertilizer needed is large. The watermelon needs sufficient nutrition throughout the growth period. Generally, based on the application of 1500-2000 kg of high-quality organic fertilizer on the acre, the application of 40-150 kg of 45% compound fertilizer and 10 kg of urea can lay a nutrient basis for the high yield of watermelon.
First, the base fertilizer application method can be applied by spreading or ditch. When applying, the fertilizer is spread on the surface, and the fertilizer is turned into the soil in combination with the flat land. Generally, 1500-2000 kg of manure is applied per acre, and 20-60 kg of 45% compound fertilizer is added; the ditch is ditched according to the row spacing of planting or sowing. Fertilizer is applied 15-20 days before sowing or planting. Generally, the fertilization variety and the amount of fertilizer applied are the same.
Second, topdressing 1, seedling fertilizer When the seedlings grow 2 to 5 true leaves when fertilizing, a small ditch from the seedlings 15 cm, 5-10 kg of urea per acre, after the application of cover soil watering. 2, vine fertilization When the main vine grows to 10-20 cm, ditch 5 to 10 cm from the plant, apply 45% compound fertilizer per acre 15 kg, combined with watering and then apply appropriate amount of human excrement and cover soil. 3, expanded melon fertilizer When the diameter of the young melon grows to 5-10 cm, 30 cm from the root and a ditch parallel to the melon ditch, apply 45% of compound fertilizer per acre 10 kg, cover the soil after watering.
Third, trace element fertilizer Practice has proved that the rational application of trace element fertilizer is also an important measure to improve the yield and quality of watermelon. 1. Zinc fertilizer can increase the germination rate of seeds and enhance the cold resistance of seedlings. Generally, 0.2% zinc sulfate solution can be used for soaking seeds. 2, boron fertilizer can increase the fruit set rate, accelerate the synthesis and operation of sugar, increase the sugar content of watermelon, increase the sweetness. There are two ways to apply boron fertilizer: one is to make base fertilizer, 1 kg of boric acid is applied, and mixed with organic fertilizer; the other is foliar spraying, that is, 0.1%-0.2% boric acid solution is sprayed during flowering period. 3. Manganese fertilizer can improve photosynthetic efficiency and promote carbohydrate accumulation. Generally, 0.2% manganese sulfate solution is continuously sprayed 2-3 times after fruit setting.

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