Potassium dihydrogen phosphate is called a universal fertilizer. It is not only a high-content phosphorus and potassium fertilizer, but also has many advantages such as easy use, quick effect, good effect, multiple functions, non-toxic and harmless, and no residue. It is especially widely used in vegetables, fruit trees and cash crops.
Some people think that potassium dihydrogen phosphate is a chemical fertilizer, and all chemical fertilizers are harmful and leave residues. First of all, we need to know that potassium dihydrogen phosphate is a registration-free fertilizer. The reason is that it is non-toxic and harmless and can be used with complete confidence. Since potassium dihydrogen phosphate is a good fertilizer, how to use it well, how to mix it, and what should you pay attention to?
Before using potassium dihydrogen phosphate, you need to understand its function. Potassium dihydrogen phosphate contains 52 phosphorus and 34 potassium, which are marked on the packaging bag. It has a wide range of functions, including increasing leaf photosynthesis, resisting lodging and disease, strengthening stems, taking root and seedlings, promoting flowers and fruits, enlarging and sweetening, and preventing premature aging.
What substances can potassium dihydrogen phosphate be paired with? Potassium dihydrogen phosphate can be used with most acidic and neutral fertilizers and drugs, such as urea, brassinoids, fungicides, insecticides, overgrowth control agents, glucose, rice vinegar, water-soluble fertilizers, fluid boron, etc. Mixed with these fertilizers and medicines, it can increase the fertilizer and medicine effects, killing two birds with one stone. And they will also synergize with each other to achieve the best use effect. For example, 1. Potassium dihydrogen phosphate combined with instant boron is a good partner for promoting flowers and fruits and preserving flowers and fruits. 2. Potassium dihydrogen phosphate combined with urea and glucose is a comprehensive nutritious quick-acting fertilizer that promotes growth, increases yield, and reduces diseases. 3. Potassium dihydrogen phosphate combined with a growth control agent can achieve the effect of controlling growth and increasing production. There are countless matching methods like the above, which can be used flexibly according to the actual situation.
What fertilizers and drugs cannot be mixed with potassium dihydrogen phosphate? Mancozeb, copper sulfate, calcium sugar alcohol, plant ash, zinc sulfate, ordinary calcium fertilizer, etc., any alkaline, copper agent, inorganic salt, etc. should not be mixed. Precipitation is easy to occur, causing fertilizer or medicine to fail. For example, mixed calcium fertilizer and other medium and trace elements, it is best to use chelated form fertilizer to improve fertilizer efficiency.
When is the best time to use it? 1. Solanaceous fruits, melons and fruits, beans and fruit trees. It can be sprayed from before flowering to the fruit expansion stage. 2. The spraying time should be in the morning and evening, because the temperature at noon is high, which is not only difficult to absorb, but also prone to fertilizer damage, whether it is spraying foliar fertilizer or spraying pesticides.
Where should it be sprayed? Many people spray foliar fertilizers or pesticides, and most of them only spray the front side of the leaves, but they don't know that the leaves absorb fertilizers entirely through stomata. The fertilizer solution sprayed on the underside of the leaves stays longer and is absorbed better. So the correct way is to spray evenly on both sides of the leaves.
How to control the concentration? Normal growth can be promoted at a ratio of 0.2, fruit enlargement can be at a ratio of 0.3, and growth control can be at a ratio of 0.5, and can be flexibly controlled according to different vegetables and growth periods. However, the concentration cannot be increased arbitrarily. If the concentration is too high, obesity may occur.
During potato planting, potassium dihydrogen phosphate can not only supplement phosphorus and potassium fertilizers, promote plant growth, but also control plant growth. The main principle is that phosphorus and potassium fertilizers can inhibit the absorption of nitrogen fertilizers and allow plants to grow slowly, but the effect is relatively slow. It must be sprayed at least once every 7 days and sprayed twice continuously to be effective. In recent years, with the promotion of Oasis, many large farms have begun to use potassium dihydrogen phosphate drip irrigation before and after ridge sealing, achieving the dual effects of controlling growth and expansion. It should be noted that due to the high concentration of foliar sprays, high-temperature sprays are not recommended. Potassium dihydrogen phosphate foliar sprays are not allowed to be used above 30 degrees. When severe growth occurs, compounding drugs are needed to control it. You can use the Oasis Control and Expansion Program to control growth. While controlling growth, it can also promote nutrient return, increase production and weight safely, without leaving any residue, and will not affect the next crop.
In short, potassium dihydrogen phosphate is a recognized good fertilizer. When used, it can be flexibly controlled according to the actual situation, adapted to local conditions, scientific and practical, so as to achieve the best effect. For more planting knowledge, methods and experience, please pay more attention.