Abstract
In soil potassium is mobile and therefore subject to leaching losses. Rich in potassium, the waste water (vinasse) from sugar and ethanol industry is generally used as a fertilizer, especially in the sugar cane fields. But the substance can contaminate rivers and groundwater by excess potassium, if not used adequately. Therefore, this study aimed to evaluate the displacement of potassium in segmented column of different unsaturated soil under application of vinasse. Acrylic columns of dimensions of 75 cm (height) x 5 cm (diameter) were filled with 2 different soils coarse-textured Oxisol (sandy) and fine-textured Oxisol (loam). The results showed that the percolation of the K + is directly related to soil type, with loam soil interacting more with the solid fraction as compared to sandy soil. Loam soil showed higher concentration of potassium in the first layers of soil, unlike the sandy soil which showed homogeneous distribution in soil layers.
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