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What Should you Know About NPK Compound Fertilizer?

Mar. 23, 2021

As an NPK Compound Fertilizer Wholesaler, share with you.

Compound NPK and NPK blends are multi-nutrient fertilizers, of which three main nutrients (nitrogen (N), phosphorus (P) and potassium (K)) account for a certain proportion. These products are designed to be fully fertilized in one application. The raw material source of each nutrient may vary according to the production process of the finished NPK fertilizer.

NPK Compound Fertilizer

NPK Compound Fertilizer

In the production of compound NPK, some of the processes used are proliferative. The fertilizer slurry is repeatedly applied to the solid "seed" particles and dried to form an "onion skin" structure similar to that produced by "DAP or MAP". Other compounds, NPKs, are prepared by an agglomeration process, where the main raw materials are fed in the form of dry solids, and then interlocked and cemented by steam, liquid salt solution, ammonium phosphate slurry and/or ammonium nitrate solution. However, in addition to the agglomeration process, which is mainly based on physical compaction and granulation, there are some processes that achieve the liquid phase through the chemical reaction of ammonia and sulfuric acid, nitric acid or phosphoric acid. 

In the NPK mixture, various dry fertilizers (such as urea, ammonium sulfate, ammonium nitrate, DAP, MAP and certain potash fertilizers) can be simply mixed in batches, so as to obtain the average N, P and The input and its ratio in the K-value mix. Ideally, in a bulk mixture, the particle size and structure of the input material should be similar to make the nutrient distribution fairly uniform. If this is not the case, a given input may be isolated in the mix, which will lead to unexpected changes in the location of N, P, and K in the field when N, P, and K are finally applied.

Compound NPK producers usually carry out specific analytical NPK production runs, and the number of different analytical NPK SKUs they can actually produce and store is limited to a certain extent. However, bulk mixes are usually further downstream in the supply chain, closer to the point of end use, and can be easily customized into an almost unlimited number of NPK variants in a relatively short period of time.

NPK fertilizers are the most economical, and one of the most commonly used nitrogen inputs is urea, but its hygroscopicity and plasticity significantly increase the tendency of urea-based NPK fertilizers to agglomerate. This situation is exacerbated when NPK also includes the most commonly used potassium salt KCL (potash fertilizer). These products also have a significant tendency to degrade and generate dust during storage and handling.

Our company also has NPK Compound Fertilizer on sale, welcome to contact us.

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