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Chemical Changes In Soils In Response To Vinasse Application

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  2010 Pittsburgh, Pennsylvania, June 20 - June 23, 2010  1009913.(doi:10.13031/2013.30016)
Authors:   João Alberto Lelis, Jarbas Honorio Miranda, Marcos Yassuo Kamogawa, Gilmar Batista Grigolon
Keywords:   ions transport, vinasse, sugar cane.

Concerns about environmental contamination continue to motivate studies of the fate and transport of chemical constituents in soils and groundwater. The present research had as objective to monitor of the dynamics, in different soil types, of chemical components present in vinasse calcium, pH e electric conductivity being released from vinasse, a by-product of the sugar cane industry, applied to both a sandy soil and a clay soil. The experiments were carried out in a protected environment using 50 soil boxes arranged in a random manner. Vinasse was applied at rates of 100, 150, 200, 250 and 300 m ha-1. Measurements showed that soil Calcium concentrations varied between 1,98 to 64,45 mg L-1 in the sandy soil, and between 2,6 to 86,5 mg L-1 in the clay soil. The values of pH furthermore varied between 6,4 to 7,75 for the sandy soil and between 4,8 to 7,32 for the clay soil, while the electric conductivity was between 0,3 to 2,3 dS m-1 for the sandy soil and between 0,23 to 0,75 dS m-1 for the clay soil. While the data revealed a clear pattern of leaching of the ion calcium and increasing pH e electric conductivity, results suggest that changes in soil chemical released from vinasse are best studied in periods of relatively long, also in soil profiles of the field, to better show its long-term dynamics in the basement.

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