Watermelon is the fruit of summer, the flesh is sweet, and it can cool down to the heat; the seed contains oil and can be used as a recreational food; the peel is medicinal, and it has the effects of clearing heat, diuresis and lowering blood pressure. Today we understand the formula fertilization of hybrid watermelon:
Hybrid watermelon needs high water and high fat. According to estimates, the production of 1000 kg of watermelon requires N5 kg, P2O52 kg, and K2O5 kg. If the hybrid watermelon is planted in a medium fertility soil with a yield of 3,000 kg per mu, it will require N15 kg, P2O 56 kg, and K2O 15 kg. To be done when fertilizing:
1. Apply enough base fertilizer. Acre of high-quality organic fertilizer 2000 kg, cake fertilizer 75 ~ 100 kg, with 50 kg of special fertilizer for watermelon or 50 kg of potassium sulfate type compound fertilizer. If there is no compound fertilizer, 10 kg of urea, 30 kg of superphosphate and 10 kg of potassium sulfate can be used. Organic fertilizer and cake fertilizer should be applied in layers or in full layer during the preparation of the soil. When the fertilizer is transplanted in the soil, the watermelon is mixed with a small amount of organic fertilizer to spread the ditch or apply.
2, pay attention to long melon fertilizer. Shichang melon fertilizer can promote early knotting and knotting big melon, but it should be applied according to the ground force and seedling condition. Generally, when the watermelon is inflated to 0.25 kg, the urea is applied 4 to 5 kg per mu. 3, do a good job of foliar spray fertilizer. The watermelon is long and the leaf area is large. The use of foliar spray fertilizer can improve the fertilizer utilization rate. In the stage of reproductive growth of watermelon, the demand for phosphorus and potassium is greatly increased. To prevent premature aging, 0.2% to 0.5% potassium dihydrogen phosphate plus 0.1% boron and 0.5% ferrous sulfate aqueous solution 50 per mu may be used. Spraying kilograms of foliar surface to prevent premature aging, enhance disease resistance, and improve the quality of watermelon
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