How to increase the sweetness of watermelon?
1. Soybean sweetening method (saccharin sweetening method)
Dissolve 500g of saccharin in a large pot of water, add 5 to 10kg of soybeans after boiling, continue to heat and boil to dry water, so that the saccharin penetrates into the body of the swollen soybeans to make saccharin beans, and then with 5kg potassium sulfate, 5kg diammonium, 15kg After the plant ash is fully stirred, the ditch is applied during the expansion period of the watermelon to increase the sugar content by about 2 degrees, and the effect is very obvious.
2. Spray potassium dihydrogen phosphate + glucose solution
During the expansion stage of watermelon, use 1kg of glucose per acre and dissolve it in 30kg of water. Add 80-100g of potassium dihydrogen phosphate. After fully dissolved, spray the plants. Spray every 7 days for a total of 2 to 3 times to make the watermelon sweet. Significantly improved.
3. Spray sweetener
Add 400g of borax, 4.8-5kg of sucrose, 1.4kg of calcium chloride to 100kg of water, and dissolve it into a sweetening solution. When the watermelon begins to swell, spray 50kg of sweetener per mu of foliage. Do not apply nitrogen fertilizer and re-watering after spraying.
4. Vegetable oil sweetening method
When the watermelon grows to a fist, use a wooden stick with a diameter of 1.5 cm, pierce a 12 cm deep hole in the soil at a distance of 2 cm from the main root, drop 3 to 4 drops of vegetable oil, seal it, and pour water once after 3 to 5 days. Using this method can increase the sugar content of watermelon by 1 to 1.5 degrees and increase the yield by 15% to 20%.
5. Spray rare earth solution
Use 40mg of rare earth solution 100mg / L per acre at the seedling stage, and 50kg of rare earth solution 380mg / L per acre at the flowering stage and young fruit stage, spraying the whole field evenly on sunny afternoon, 3 times in total. With this method, the leaves can be enlarged, the leaf color becomes thicker, the yield is increased by more than 10%, the sugar content is increased by 1 to 2 degrees, and the storage and transportation resistance is strong.
6. Spray triacontanol
In the fruit setting period and fruit enlargement period of watermelon, spraying 0.5mg / L tricosyl alcohol liquid 40-50kg per mu can increase the yield by about 20%, and the sugar content can be increased by 1 degree.
7. Strengthen field management
①Widening the temperature difference between day and night, the larger temperature difference between day and night is conducive to the accumulation of photosynthetic products, that is, sugar. The temperature of the watermelon in the protected area is maintained at 32-35 ℃ in the daytime and 15-18 ℃ at night, and the temperature difference between day and night is maintained at 16-18 ℃, which is beneficial to improve quality.
â‘¡ Excessive soil moisture during watermelon ripening will reduce the sweetness. Be sure to control water during the 10 days before ripening.
â‘¢ Harvesting in time, generally watermelon development takes 30 to 35 days to fully mature, the sugar content is high, and the flavor is good. However, at present, some melon farmers often harvest early to reduce the sweetness for the morning market. Timely harvesting is the basic measure to ensure watermelon.
Disclaimer: Some articles of this website are transferred from the Internet. If the legal rights of third parties are involved, please inform this website for processing. phone
Blackout greenhouse ,Light dep greenhouse ,Auto light deprivation greenhouse,Blackout green house,film greenhouse
JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , https://www.thgreenhouse.com