Potassium dihydrogen phosphate and urea can be used together to restore crop growth and promote leaf greening. Here's how to use it:
1.Crop types: The combination of potassium dihydrogen phosphate and urea is suitable for a variety of crops, including fruit trees, vegetables and grasses such as rice, wheat and corn.
2.Use period: Fruit tree crops are generally used after the fruit of the flower seat to supplement the early nutrient consumption and reduce physiological fruit drop. It can also be appropriately supplemented during the fruit expansion and coloring periods. Vegetable crops are used during the flowering and fruiting period to reduce flower and fruit drop and promote fruit expansion. Poaceous crops can be used during the growing period.
3.Concentration: 0 is recommended for fruit tree crops2%-0.3% potassium phosphate monobasic and urea mixture, urea at 200 times (0.).5%) with water, potassium dihydrogen phosphate at a rate of 500 times (0.).2%) with water. It is recommended to use 0 for vegetable crops5% concentration of urea and 01-0.2% concentration of potassium dihydrogen phosphate mixture. Poaceous crops have a good tolerance to potassium dihydrogen phosphate and urea, urea can be 1% concentration, potassium dihydrogen phosphate 05% concentration or more.
4.Application: Dissolve potassium dihydrogen phosphate and urea with water according to the above concentration, and then carry out foliar spraying. When spraying, the front and back sides of the leaves should be evenly covered to improve the absorption effect.
5.Precautions: When using, potassium dihydrogen phosphate and urea produced by regular manufacturers should be selected to ensure product quality. In addition, spraying should be avoided during high temperature periods to avoid damage to crops.
The combination of potassium dihydrogen phosphate and urea can play a better role in restoring crop growth, helping leaves to turn green and improve yield. However, attention should be paid to the concentration and method of use, so as not to cause fertilizer damage.