Atributos químicos de um latossolo submetido a remineralização e adubação orgânica

Abstract

The use of stonemeal in agriculture as an alternative or complementary source of fertilizers can mean a benefit for the producer, as it remineralizes the soil, as well as for mining companies, as they manage to allocate this material avoiding environmental problems. The objective of this work was to evaluate some chemical attributes of a Clayey Red Oxisoil as a function of the application of doses of soil remineralizer (stonemeal) associated or not with organic fertilization. This research work began in November 2015, and was conducted and continuously monitored in order to evaluate the performance of the remineralizer over time. The work was carried out in the experimental area of the Federal University of Fronteira Sul, in the municipality of Erechim. Rio Grande do Sul. Stonemeal was applied and reapplied to the surface, without incorporation, at different times in the following doses of 0, 3, 6, 9 and 12 t/ha with or without organic fertilization. Soil chemical attributes were evaluated in layers from 0 - 10 cm and from 10 - 20 cm: active acidity (pH (H2O) and pH(CaCl2)), organic matter, phosphorus and potassium contents. The treatments influenced the active acidity, organic matter contents, phosphorus and potassium contents. The rock dust associated with the organic fertilizer positively influenced the potassium levels in the 0 - 10 cm layer, while the association of the remineralizer with the organic fertilizer positively influenced the levels of organic carbon, pH(H2O) and pH(CaCl2) in the layer of 10 - 20 cm.