Incubação do calcário e as características químicas de solos com texturas diferentes

Abstract

Liming interferes on the availability of nutrients, because it reconditions the soil. This change may or may not be favorable, depending on the culture to be implanted and the soil to be corrected. For this, a experiment was realized with the objective of to evaluate the effects of limestone, that the quantity was calculated using the method of incubation with CaCO3, in the chemical characteristics of two soils, one with medium texture and the other with a clayey texture. First, the soil was incubated with the limestone and the material was kept in plastic bags for 40 days, considering the types of soils studied. The amount of limestone depended on the doses tested, which were distributed in a completely randomized design, constituting 10 treatments (doses) and three replications, that were: 0.0; 0.5; 1.0; 2.5; 5.0; 7.5; 10.0; 12.5; 15.0 and 20.0 t ha-1. After incubation, analyzes of the chemical characteristics of the soils, were carried out. The increase of limestone doses, applied to the dystrophic Red Latosol, caused alterations in Ca, Mg, H, Al and Fe contents; culminating in changes in characteristics as pH, CTC, V% and m%, when the texture was clayey and medium.