Watermelon Sweetening 4 Method
1. Increase phosphorus and potassium fertilizers. Watermelon applied 10kg of potassium sulfate per acre after fruit set, or sprayed with 0.2% potassium dihydrogen sulfate aqueous solution in the early stage. 2. Spray watermelon spirit. Watermelon contains more than 10 nutrients necessary for the growth of watermelon. Spraying watermelon spirit during the initial flowering period and fruit setting period of watermelon can increase the yield of watermelon by about 20%, and the sweetness is also improved obviously. 3. Spray sweetener. Each mus of borax 30g, sucrose 1kg, calcium chloride 5g, dissolved in water 50kg, spraying in the late growth of watermelon fruit can increase the sweetness of watermelon by 1-2 degrees. 4. Shi Xian Ye chrysanthemum fertilizer. Per acre to take Stevia broken leaf 0.5kg, force, water 25 kg, plus soybean 10kg, soaked into the pot until the soybean water swelling, boil, dry water, made Stevia bean fat. In the watermelon fruit setting period, the prepared Stevia bean grain fertilizer is applied near the root, which can significantly improve the sweetness of the watermelon.