Evaluación del potencial de eficiencia de los efluentes líquidos generados por el biodigestor de la reserva cosmopolitana como acondicionadores del suelo

Abstract

The present research evaluated the efficiency potential of the liquid effluents generated by the biodigester of the Cosmopolitan Reserve in order to discover a new alternative for soil conditioning and to be used as a bio-fertilizer. To achieve the objective, a methodology developed in three phases was established: the first one, the identification of the physical-chemical properties of the soil and the effluent, the second one, the application of bioassays, and the third one, the evaluation of the performance of Brachiaria brizantha grass with Pearson's correlation coefficient and variations in soil conditions. The pH, TS, VS, N total, NO2 and NO3 and CE presented characteristic concentrations according to referents that studied the same type of pig effluent, because the data obtained were between established ranges or close values, however, COD and P were not included due to their low concentrations. These effluent concentrations generated variations in soil conditions, as evidenced by increases in CE, Dr, P, and decreases in Da, although stability in pH and humus was found. On the other hand, bioassay 11, which contained 150 ml effluent / 375 g organic fertilizer, was the one that presented the best growth of Brachiaria brizantha grass in its foliar characteristics of length and weight, which was due to the concentration already applied and them complex physiological processes. Furthermore, the Pearson's correlation coefficient did not present a direct linear association between the effluent concentrations and the length, width, weight and root, while organic fertilizer did present a direct association, but of low magnitude.