INCUBATION OF A RED-YELLOW ARGISOIL dystrophic WITH APPLICATION OF INCREASING DOSES OF BURNOUT TO CaCO3 EXCHANGEABLE ACIDITY

Abstract

    The objective of this work is to neutralize the effect of exchangeable acidity of a RED-YELLOW ARGISOIL dystrophic incubated with application of increasing doses of CaCO3. This work was performed at the Laboratory of Soil Science UEMA / CESI. Soil samples were collected in a RED-YELLOW ARGISOIL dystrophic in Exhibition Park of Imperatriz/MA, at 0-20 cm depth. After collecting the samples, they were carried to the laboratory, air-dried, then broken, passed through a sieve of 2 mm mesh size and mixed and routed to the soil laboratory for routine analysis. Soil samples were placed hatching increasing doses of calcium carbonate equivalent to 0, 1, 2, 3, 4, 5, 8 and 10 t.ha-1 (CaCO3), with ten repetitions, in a completely randomized design. After 30 days the start of incubation was taken from each experimental samples to determine the exchangeable acidity (Al3+), in order to determine the equation of the curve and the neutralization of soil analysis. There were significant differences between treatments with respect to Al3+. The amount used to neutralize the exchangeable acidity determined by the regression equation for the study of soil in Exhibition Park of Imperatriz/MA was 8,8 t.ha-1 of CaCO3.   KEYWORDS: Aluminum. Neutralization curve. Production.