I. Is water-soluble fertilizer a compound fertilizer?
Compound fertilizer refers to a chemical fertilizer containing two or more nutrient elements in nitrogen, phosphorus and potassium. It has the advantages of few auxiliary components and good physical properties. Water-soluble fertilizer is a kind of nutrient-rich fertilizer, so is it a compound fertilizer?
Water-soluble fertilizer is a combination of nitrogen, phosphorus, potassium, calcium, magnesium, sulfur and other medium and trace elements, as well as seaweed, humic acid, amino acids and other components, through a special process to compound and dissolve, so that the same weight of products A type of fully water-soluble fertilizer that contains more nutrients. According to the definition of compound fertilizer, water-soluble fertilizer is a type of compound fertilizer, but it is different from ordinary compound fertilizers.
Second, what is the difference between water-soluble fertilizer and compound fertilizer
Some people say that water-soluble fertilizer is compound fertilizer, the same raw material, granulation is called compound fertilizer, It is called water-soluble fertilizer without granulation, but in fact this statement is inappropriate. Water-soluble fertilizer is a kind of compound fertilizer, but compared with ordinary compound fertilizer, it is different in many aspects. The main difference between water-soluble fertilizer and compound fertilizer is There are:
1. Different standards
The implementation standards of compound fertilizer and water-soluble fertilizer are different. The implementation standard of compound fertilizer is the national standard of GB/T15063-2020. The standard for macro-element water-soluble fertilizers is the agricultural standard of NY/1107-2020.
2. Different raw materials
The raw materials for the production of compound fertilizers are generally urea, ammonium chloride, ammonium sulfate, superphosphate, potassium sulfate, chloride Potassium, etc. The main raw materials used in the production of water-soluble fertilizers are potassium dihydrogen phosphate, potassium nitrate, industrial-grade monoammonium phosphate and other raw materials. Different raw materials have different absorption and utilization rates.
3. Different formulations
Compound fertilizers are made by chemical methods or mixed methods, such as ammoniated granulation, drum granulation, shotcrete granulation, etc. Granules or granules such as tower granulation. Water-soluble fertilizer is a multi-component fertilizer that can be completely dissolved in water, and it can be divided into two forms: solid and liquid.
4. Different functions
Compound fertilizers are mainly composed of nitrogen, phosphorus and potassium, and the formula nutrition is relatively simple, and most of them cannot be completely dissolved in water and absorbed. The utilization rate is relatively low, so compound fertilizer is more suitable as a base fertilizer. Water-soluble fertilizer has quick effect and high absorption and utilization rate, which is 2-3 times that of ordinary compound fertilizer. It is more suitable for top dressing of economic crops.
5. The price is different
Because of the different raw materials, the price is also very different. Generally, the price of compound fertilizer is lower for fertilizers with the same nutrient content of the same brand. in water soluble fertilizers.
Third, can water-soluble fertilizer and compound fertilizer be used together?
It is generally not recommended to use them together.
The period (speed) and effect of water-soluble fertilizer and compound fertilizer are different. The former has a shorter fertilizer effect, generally only about 20 days, while the latter has a longer fertilizer effect. If water-soluble fertilizer and compound fertilizer are applied at the same time It will cause excess nutrients in the soil, which may lead to fertilizer damage.
