With the popularization of watermelon high-yielding cultivation techniques, the yield of watermelon has been greatly improved. However, due to the unreasonable soil structure in recent years, the reduction in organic matter content, coupled with people's one-sided pursuit of high yield, unreasonable use of chemical fertilizers, resulting in a decline in the sweetness of watermelon, it is difficult to sell a good price on the market, seriously affecting the economic benefits of melon farmers. To achieve the desired benefits, in addition to selecting high-sweet, high-quality watermelon varieties, the following sweetening techniques can be used:
The addition of phosphorus and potassium fertilizers, phosphorus and potassium, can promote the formation, transportation and storage of carbohydrates. Therefore, increasing phosphorus and potassium fertilizers can increase the sugar content of watermelons, while the simple application of nitrogen fertilizers will reduce the sugar content. Tests have shown that watermelon base fertilizer is applied to high-quality farmyard fertilizer 3000-4000 kg per mu, and after topdressing phosphorus and potash fertilizer, sweetening effect is good. Generally after the watermelon sits melon, applying 10 kg of potassium sulfate per acre can increase the sweetness of watermelon by 1-2%; add 2.5-3 kg of water to plant ash and add 50 kg of water, and mix well for 8-12 hours. Take clear liquid sprayed on the leaf surface, can increase production by more than 10%, the sugar content can be increased by 0.5-1 degrees; the initial stage of watermelon spraying 0.2% potassium dihydrogen sulfate solution, or in the stretch period of 5 kg of phosphate fertilizer per acre points, Better sweetening effect.
Spraying Additives In the middle and late stages of watermelon growth, sprinkle sweeteners on the leaves of watermelons. The formula for the sweetening solution is: 30 grams of borax, 1000 grams of sucrose, 5 grams of calcium chloride, and 50 kilograms of water after dissolution. 25-30 kilograms per acre can increase the sweetness of watermelon by 1-2%.
Watermelon Spirit Watermelon is a highly effective foliar nutrient solution containing more than 10 nutrients needed for the growth of watermelon. It can be sprayed on the front and back surfaces of the leaves once diluted in the early flowering period and the squashing period of the watermelon. The yield of watermelon is about 20%, and the sweetness is also obviously improved.
Microbial Fertilizer Microbial Fertilizer Fertilizer is a high-tech bio-fertilizer containing hundreds of millions of high-efficiency active microbial silicate bacteria. It can decompose and transform potassium-containing minerals in the soil, turn invalid potassium into effective potassium, and continuously release it for use. Potassium for plant absorption, it can promote the growth and development of watermelon, so that the dark green leaves, fruit shape upright, a large and neat, fast sugar transport, can increase the sweetness of watermelon 1-1.5 into.