Estudo da influência da aplicação de nanopartículas de ZnO e MgO no solo de plantio de milho

Abstract

The present work presents the synthesis of ZnO and MgO nanoparticles for application to soil for corn planting and further study of their development at different concentrations of the samples and also in relation to the particle diameter. For the study ZnO and a mixture of ZnO/MgO (1:1) were used, being nanoparticulate samples synthesized in the laboratory both by the combustion method and in bulk format obtained commercially. Corn was grown on latosol prepared and treated with the oxide samples and was cultivated for 90 days to study plant development by comparing the variation in root and leaf biomass. By means of infrared spectroscopy it was possible to determine the best temperature for the synthesis of nanoparticulate materials and to verify the formation of oxides, absence of secondary phases and impurities after thermal treatment. Through X-ray diffraction the formation of typical crystalline phases was observed for ZnO and MgO, which presented crystalline diameters of 39 nm and 28 nm, respectively. In relation to the variation of the biomass dose applied when compared to the zero dose showed little influence in relation to the biomass of the model plant, standing out the mixture ZnO and MgO bulk with a significant increase of biomass with the increase of the concentration.