Incubação e doses de enxofre elementar sobre os atributos químicos de um solo com excesso de sais e sódio.

Abstract

The recovery of soils with high salinity and alkalinity requires the use of products that promote the reduction of pH and decrease the levels of exchangeable Na, to improve its fertility. The objective was to evaluate the effect of elemental sulfur on the chemical attributes of a soil with high soluble salts and exchangeable Na. An experiment was conducted in a greenhouse, using samples of a Flavic Sodium Neosol with a sandy loam texture. The treatments consisted of a 4 x 5 factorial arrangement, four elemental sulfur (0,400, 800 and 1,200 mg dm-3) and five incubation periods (0, 7, 14, 21 and 28 days), being evaluated every 7 days . The values of Ca + Mg, K, Na and the values of pH, CE1:5, PST and soil CTC were evaluated. The elemental sulfur positively influenced the chemical attributes of the soil, providing better fertility. Incubation periods influenced positively the sulfur action. Despite the efficiency of the corrective soil, increasing the Ca content, there is a need for an additional source of this element in the soil.