The two differ significantly in process, cost, and product characteristics, catering to different production and operational needs.

In terms of process principle, NPK blended fertilizer is a purely physical blending process, simply mixing nitrogen, phosphorus, and potassium fertilizers without chemical reactions or the need for granulation and drying, resulting in a simpler process. Compound fertilizers, on the other hand, mostly involve chemical synthesis and granulation, with raw materials undergoing reaction, granulation, drying, and cooling, leading to a more complex production process.

There is a significant difference in equipment investment. NPK blended fertilizer requires less equipment, occupies less space, and has a shorter construction period. Small and medium-sized NPK blending fertilizer production lines have low initial investment costs and a fast return on investment. Compound fertilizer production lines require numerous supporting equipment, resulting in higher civil engineering and equipment costs, longer construction periods, and greater upfront capital investment.

Regarding production flexibility, blended fertilizers allow for easy adjustment of the nitrogen, phosphorus, and potassium ratios, enabling rapid customization of various specialized fertilizer formulas to suit different crop and soil needs. Compound fertilizer formulas are fixed, and changing the ratios is cumbersome and difficult to flexibly adjust product types.

The products have distinct characteristics. Blended fertilizer particles are prone to stratification due to their small particle size, and slight segregation is likely after prolonged storage, resulting in less uniform nutrient distribution. Compound fertilizer particles are compact and round, with stable physicochemical properties, less prone to stratification and clumping, and exhibit lower storage and transportation losses.

In terms of energy consumption and losses, blended fertilizers only consume electricity for stirring and transportation, resulting in low energy consumption and minimal raw material loss. Compound fertilizers, on the other hand, have high electricity consumption during the high-temperature drying process, leading to higher material losses during production.

They cater to different market needs. Blended fertilizers are suitable for small and medium-sized processing plants, seasonal production and sales, and customized soil testing and formula fertilizers. Compound fertilizers offer stable quality and a superior appearance, are the mainstream choice for major brands, enjoy higher market acceptance, and are suitable for large-scale, long-term production.