Fewer guava fruit fructose, low sweetness, taste is not sweet, meat is not brittle, easy hollow, particularly serious damage caused by anthrax, which is closely related to the lack of supply of phosphorus, potassium, calcium and magnesium fertilizer. If the phosphorus, potassium, calcium and magnesium fertilizers are added in time during the summer guava flowering results to ensure sufficient supply of phosphorus, potassium, calcium and magnesium fertilizers, these phenomena will not occur, making the fruit sweet, the flesh crisp, the fruit not hollow, resistant to anthrax, and not bad. fruit. The specific approach is as follows: When buds begin to appear in the summer of guava, the root is given a phosphorus, potassium, calcium and magnesium fertilizer. Each plant applies 2 to 3 kilograms of superphosphate or calcium magnesium phosphate, 0.5 to 0.75 kilograms of magnesium sulfate, 0.25 to 0.5 kilogram of potassium sulfate, 0.75 to 1 Kg NPK (15-15-15) Potassium sulfate or nitrate-based or pure sulfur-based compound fertilizer. Around the canopy drip line, dig deep and wide ring grooves of 25-30 cm each, mix all the fertilizer and spread it in the ring ditch, cover the soil. At the same time, every 10 to 15 days, foliar spray once 800-1000 times the amount of phosphorus phosphorus potassium, 800 to 1000 times calcium and calcium magnesium mixed liquid, or 0.1% magnesium sulfate, 0.3% potassium dihydrogen phosphate, 800 times Calcium chelate mixture, continuous spraying 3 to 5 times. Wetly spray all the branches, buds, and fruits inside and outside the canopy. It is advisable to start dropping with drops of water, supplementing the phosphorus, potassium, calcium and magnesium fertilizers from the leaves. Cable Reel,Water Hose Reel,Water Hose Cable Reel,Commercial Water Hose Reel NINGBO QIKAI ENVIRONMENTAL TECHNOLOGY CO.,LTD , https://www.hosereelqikai.com