The role of potassium dihydrogen phosphate can promote the absorption of nitrogen and phosphorus by fruit trees and other crops, promote photosynthesis, improve crop resistance, improve fruit quality, and regulate crop growth. So, how to use potassium dihydrogen phosphate? What are the precautions for using potassium dihydrogen phosphate? Let's take a look together below.
How to use potassium dihydrogen phosphate
1. Spraying the leaves: This is the most common method of use, and the concentration should not be too high when using it, just about 0.2-0.3%. Do not use too frequently, just apply once a week or ten days. It can promote flowers, strengthen seedlings and promote fruit.
2. Soaking and dressing seeds: Soaking the seeds means that the potassium dihydrogen phosphate and water are prepared, and the seeds are soaked for 12-16 hours. Usually, 50 kg of water is used for 100 g of solution. Seed dressing also needs to be prepared, and then sprinkled on the seeds for stirring. 2g of dihydrogen phosphate can dress 1 kg of seeds.
3. Dip root: It is generally used when transplanting flowers, just mix water, fine soil and potassium dihydrogen phosphate and use it. This can help the plants absorb nutrients, but be careful not to directly use the root system to contact potassium dihydrogen phosphate, it must be adjusted before use.
Precautions for the use of potassium dihydrogen phosphate
1. It should not be mixed with alkaline products, such as Bordeaux liquid, copper hydroxide, potassium hydroxide, etc.
2. It should not be mixed with products containing carbonate, such as potassium carbonate, sodium bicarbonate, etc., because it is easy to produce carbon dioxide gas and waste fertilizer.
3. It cannot be mixed with copper preparations such as copper hydroxide, basic copper sulfate, copper calcium sulfate, cuprous oxide, copper complex ammonia, copper quinoline, etc. These free copper ions will react with phosphate ions to form flocculation, precipitation.
4. Potassium has an antagonistic effect with magnesium and calcium ions, which affects the absorption of these two types of ions, which is not conducive to the growth of plant cells, affects the growth of plant seedlings, and has a greater impact on the later yield. Therefore, it is not recommended to use potassium dihydrogen phosphate before the seedling and flowering stage of vegetables and legumes, so as to avoid damage to seedlings, falling flowers and pods. If used on soybeans too early, it will reduce yield.
5. Potassium dihydrogen phosphate is very water-soluble and easily dissolves in water. It is also easily washed away by rain when buried deep in the soil. The effect is short, so it is not recommended to be used as a base fertilizer. Potassium dihydrogen phosphate has good water solubility and strong quick-acting effect. It can be used for leaf spray during key periods such as flower bud differentiation, and it can also be used for root flushing.