Although the market conditions of watermelons in recent years have changed suddenly, but because the watermelon growth period is not very long and the results are quick, many farmers still plant watermelons in certain areas every year. How to increase the yield of watermelon and increase the sweetness and increase the economic benefits?
Select organic fertilizer and potassium sulfate fertilizer. Watermelon sown at the same time, the application of different fertilizers have great differences in their sweetness. When using watermelon basal fertilizer, organic fertilizer and potassium sulfate compound fertilizer should be prepared.
The formula is balanced with fertilizer application. The root system of watermelon is relatively developed, and the function of absorbing fertilizer is strong. To increase the yield and quality of watermelon, it is necessary to provide multiple compound fertilizers in time. According to research conducted by the agricultural research department, the ratio of N, P and K uptake by watermelon is 3.1:1:3.5. When basal fertilizer is applied in Daejeon, 2500-4000 kg of organic fertilizer should be applied to farms per acre, or 150 kg of commercial organic fertilizer, or 100-150 kg of cake fertilizer, and NPK should be applied to 18%, 10%, and 20% (including Sulfur compound fertilizer 40 to 50 kilograms is applied to the ditch or hole 15 cm below the surface of the soil 15 days before seedling colonization.
After the seedlings of watermelon are slowly growing, the seedling fertilizer, vine spread fertilizer, and swelled manure fertilizer should also be applied in divided times, with particular emphasis on the application of expanded manure. At the same time, according to the seedlings outside the roots, topdressing, spraying 0.5% urea, 0.2% potassium dihydrogen phosphate, and 0.1% Sonic boron solution, respectively, can also be sprayed.
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