What is the solubility of potassium dihydrogen phosphate in water?

Potassium dihydrogen phosphate is a very good fertilizer, suitable for melons and fruits, vegetables, grain and oil crops and other cash crops. It can effectively increase yield and income, improve crop fruit quality, resist lodging, resist pests and diseases, strengthen stems and plump seeds, so what is the solubility of potassium dihydrogen phosphate?

1. What is the solubility of potassium dihydrogen phosphate?

At room temperature of 0°C, the solubility of potassium dihydrogen phosphate is 14.8g; at 10°C, the solubility is 18.3g; at 20°C, the solubility is 22.6g; at 30°C, the solubility is 28g; at 40°C, the solubility is 33.5g; at 50°C, the solubility is 40.7g. For every additional 10°C increase thereafter, the solubility also increases by 10g in turn, reaching 83.5g at 100°C. Therefore, it is recommended that room temperature be around 18 degrees.

2. How is potassium dihydrogen phosphate used?

1. Spraying method: Focus on spraying the back of the leaves to seek the best absorption effect. Generally, foliar spraying is the main method. Spray once every 7~10 days, for 2~3 consecutive sprays. If spraying fruit trees, spray once every 10-15 days before flowering, after flowering, at the young fruit stage, and at the fruit swelling stage.

2. Spraying time and concentration: Choose to spray during the critical period or peak period of crop absorption of phosphorus and potassium for the best effect. For example: for root topdressing, the general concentration at the seedling stage is 0.05%~0.1%, and at the middle and late stages it can reach 0.2%~0.3%, for foliar spraying; during the growing period, 0.2%~0.3% potassium dihydrogen phosphate solution is commonly used to spray the leaves, which can make the branches strong and the leaves luxuriant; spraying 2~3 times with 0.3% potassium dihydrogen phosphate solution at the bud stage can make the flowers larger and more numerous, with bright colors.

3. Mixing situation: Potassium dihydrogen phosphate can be mixed with most acidic pesticides and fertilizers. The pH of a 0.5%~1% potassium dihydrogen phosphate solution is between 4.6~6, and it generally will not cause precipitation with other substances.

However, when mixing, the concentration should not be too high or too low. It should be determined according to local specific conditions. It is recommended that everyone use it at a 300-fold dilution to avoid leaf scorching.