Agrominerais no cenário brasileiro: uma breve revisão

Abstract

Brazil is expected to maintain a high demand for food, requiring greater agricultural efficiency. In this context, agrominerals play an important role in soil correction and fertility, acting as sources of macro-and micronutrients. Materials such as limestone, gypsum, and remineralizers contribute to agricultural productivity, although the country still shows a high dependence on imported NPK fertilizers, despite possessing significant mineral reserves. This study presents a systematized review of the scientific production on agrominerals in Brazil between 2005 and 2025. The research was conducted using the Scopus and Web of Science databases, in which 50 records were initially identified, with 35 articles selected according to the inclusion and exclusion criteria. Brazil accounts for approximately 8% of global fertilizer consumption and ranks fourth among the world's largest consumers. In 2024, soybean, corn, and sugarcane accounted for approximately 75% of national fertilizer consumption, reinforcing the need for alternatives to imported fertilizers. In this scenario, the country has expanded the use of remineralizers, standing out internationally. Of the studies analyzed, 83% were published between 2021 and 2025, highlighting the recent growth of research, mainly on remineralizers and rock powders. The most investigated materials included basalts, biotite schists, serpentinites, phonolites, syenites, and marble processing waste. The most frequently used characterization techniques were XRF, XRD, ICP-OES, ICP-MS, and SEM. Agronomic trials demonstrated that certain rock powders can increase soil pH, enhance the availability of Ca, Mg, K, and P, improve cation exchange capacity, and promote the physical and biological properties of the soil, with positive responses in crops such as corn, rice, soybean, sorghum, and lettuce. The results indicate that agrominerals have the potential to partially complement conventional fertilizers and reduce external dependence, although long-term studies, economic evaluations, and logistical analyses are still required to expand their application on a commercial scale.