Granulated Mineral-Organic Humic Preparations Based on PAPR

Abstract

Facing gradually increasing global demand for food, it is essential for modern agriculture to use fertilizers. However, it appears that a common problem in obtaining high yields is the lack of organic matter in the soil, and fertilization only with mineral components is not able to make up these deficiencies. That is why more and more opinions emerge in favor of the use of organic and mineral preparations. The use of humic acids (HA) in addition to mineral fertilizers seems to be a very promising solution. Another global problem is the depletion of phosphorus reserves. The solution may be the production of mineral fertilizers from materials previously considered to be too low in phosphorus. In contrast to the typical production of superphosphate, the material can be subjected to smaller quantity of acid than it is expected from the stoichiometry of reaction. This kind of fertilizer is called PAPR (partially acidulated phosphate rock). The aim of the research was to determine the influence of HA content in preparations based on mineral fertilizers, especially PAPR, on granulation process efficiency and crushing strength of product granules.