Corretivo de alta reatividade na acidez do solo e produção vegetal

Abstract

In the Brazilian agricultural activity, we aim to increase productivity and, for this, We seek the development of new technologies, tools, inputs and genetic improvement of plants, has been presenting an increasingly sophisticated technological character, so that there is evolution and occur the increase in production. Correctives of the acidity of high solubility aim to decrease the acidity of the soil raising the pH in a short time, increasing the availability of nutrients crop productivity. These products are entering the market and being used by the producers; however, one does not have much information of the efficiency of the product in the form in which it is being used. The objective of this work was to evaluate the Calcite® as corrective of the soil acidity applied in seeder line with fertilizer. The tests were carried out in the experimental farm of the Universidade Tecnológica Federal do Paraná Campus Dois Vizinhos, from September 2017 to March 2019, in soybean, oats for soil cover and corn grown in rotation, the design used is randomized blocks with 4 replicates. The treatments were composed of the application of 75, 150 and 300 kg ha-1 of Calcite® together with mineral fertilization of 300 kg ha-1 of the formulation N-P205-K20, 2-18-18 and a treatment with mineral fertilization only and in the following year repeated the same doses of the product to the haul. The chemical attributes of the soil were evaluated: pH, Ca content, base saturation, base sum, soybean yield, oat biomass yield components, mass of one thousand grains and maize crop productivity. This work concluded that the product had an effect on the pH, Ca and V% of the soil, but its mobility was not good because its results limited the depth where it was deposited, as productivity only increased in the second year, that is, third crop where the treatment with the addition of 150 kg ha-1 for the maize crop was highlighted.