Uso de remineralizador e esterco bovino em solo cultivado com trigo

Abstract

The use of remineralizers as source of nutrients to crops may to constitute in alternative, in view of reducing the environmental, social and economic problems caused by mineral soluble sources. The objective of this study was to evaluate the use of doses of remineralizer, associated or not to bovine manure, and its effect on grain yield of wheat, your nutrition, on chemical properties and on density of soil. The experiment was installed in Erechim-RS, on a Humic Hapludox. The experimental design used was randomized blocks, in factorial scheme with three replications. The sources of nutrients were applied to the soil, without incorporation, in two moments, in the doses 0, 3, 6, 9 and 12 t ha -1 of remineralizer, isolated 33 and associated with the doses of bovine manure was 17 and 28 t ha -1 in the first and in the second application, respectively. In the crop, were evaluate of the grain yield components and the leaf N and P content. In the soil were evaluated active acidity, potential acidity, P, Ca, Mg, Al and density, after 390 and 171 days of the first application and second, respectively. The results were submitted the analisys of variance, regression for quantitative variables, and comparison of means by the Tukey to 5% of probability for qualitative variables. The application of bovine manure, independent of the dose of remineralizer, resulted in increments in the variables: grain yield, height of plant, number of grain per spike, mass of one thousand grains and soil P and Ca contents. The N leaf increased with application of manure. The treatments influenced the potential soil acidity and in the soil Mg content. The remineralizer, independent of the dose, associated with bovine manure can be used as a source of nutrients to wheat and improve some soil chemical attributes.