Ajuste metodológico para quantificação de NPK em biofertilizantes líquidos

Abstract

The growing search for sustainable practices in agriculture has driven the use of liquid biofertilizers. Although it is known that these products are rich in nutrients, there is little clarification regarding the exact concentrations of nitrogen (N), phosphorus (P) and potassium (K). Thus, this work aimed to adjust the methodology for quantitative determination of NPK present in liquid biofertilizers: superlean, liquid swine manure, liquid humus, slurry, enriched slurry and boiled manure. The research consisted of the application of already consolidated laboratory methodologies, with specific adaptations for each nutrient, carried out at the UTFPR Soil Laboratory. The results indicated that boiled manure had the highest concentrations of NPK and that, for each nutrient, there is a more appropriate methodology. One of the main results obtained was the adaptation of a specific methodology to quantify nitrogen. The analyzes carried out indicated the importance of selecting precise procedures to guarantee the efficiency of liquid biofertilizers in agricultural practice, contributing to sustainability and the development of more efficient technologies.