Avaliação da atividade enzimática em solos quimicamente equivalentes e com diferentes produtividades

Abstract

Soil is one of the main limiters for increasing productivity in the field, as well as agricultural activity and different management practices. The evaluation of soil quality was the objective of this work, with the physical-chemical and the enzymatic activity analysis of soil samples collected from a particular agricultural area and the chemical analysis of the plant tissue of the maize crop, 2020/2021 crop that showed irregular development throughout its extension, aiming to understand how the agricultural management used affected the regular development of the crop under study. The analyzes were carried out using analytical techniques with methodologies validated in the laboratory, and the enzymatic activity was evaluated taking into account the concentration of Arylsulfatase and Beta-glucosity enzymes, as well as the other physicochemical analyzes with the comparison of soil and plant samples from the areas that showed visible symptoms of maize crop development in relation to samples with development considered normal. In addition, the results obtained for soil contaminants in relation to environmental legislation were evaluated. In general, the chemical parameters in relation to the reference values for soil fertility and plant nutrition, were above the average values for the corn crop, evidencing the importance of a previous harvest planning, in order to guarantee not only the high productivity combined with profitability, but, in addition, care with the cultivation of the soil and its preservation for the next crops. The concentration of potentially toxic elements studied were below when compared to the reference values stipulated by the National Council for the Environment.