What is compound fertilizer? What are the characteristics of compound fertilizer?

What is compound fertilizer? Many people just know that the crops need to use compound fertilizer, but they can''t tell why, so what is compound fertilizer? In a chemical fertilizer, fertilizers that contain two or more of the main nutrients such as N, P, and K are called compound fertilizers. Those containing two main nutrients are called binary compound fertilizers, those containing three main nutrients are called ternary compound fertilizers, and those containing more than three nutrients are called multi-compound fertilizers.

1. How to express the nutrient content of compound fertilizer?
It is customary for compound fertilizer to use the corresponding percentage of N-P2O5-K2O to express its composition. If a certain compound fertilizer contains N10%, P2O520%, and K2O10%, the compound fertilizer is expressed as 10-20-10. Some are marked with S after the K2O content number, such as 12-24-12(S), which means that it contains K2SO4.
The minimum of each nutrient in the ternary compound fertilizer is not less than 4%, and the general total content is in the range of 25% to 60%. The total content of 25% to 30% is low concentration compound fertilizer, 30% to 40% is medium concentration compound fertilizer, and more than 40% is high concentration compound fertilizer.

Second, the difference between compound fertilizer and compound fertilizer?
1. Different implementation standards: The national quality and technical supervision law stipulates that the standard for the production of compound fertilizers is the mandatory national standard of "Compound Fertilizers". The production of compound fertilizers is carried out by the enterprise standards drafted by the production enterprises and submitted to the provincial quality and technical supervision bureau for record.
2. Different production processes: The production process of compound fertilizer is relatively simple. Usually, urea, superphosphate and potassium chloride are processed by mechanical mixing, and generally do not need to use expensive chemical production equipment. However, compound fertilizer is made by chemical reaction in the production process, and the completion of this process requires complex technology and expensive chemical equipment.
3. Different forms of supervision and management: Since the production of compound fertilizer generally does not require expensive chemical equipment, it is easier to use shoddy products and pretend to be the truth. In order to protect the interests of farmers, the national quality and technical supervision department implements the supervision and management of the "Industrial Product Production License". The production of compound fertilizer does not require this certificate.

3. What are the characteristics of compound fertilizers?
The advantages of compound fertilizers: high effective components, many types of nutrients; few side components, less adverse effects on soil; low production cost; good physical properties.
Disadvantages of compound fertilizers: The proportion of nutrients is fixed, and it is difficult to adapt to the different needs of various soils and crops. It is often supplemented and adjusted with elemental fertilizers.

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