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Significance of Biological Sulfate Reduction in Soil Salinity
Author(s) -
Ogata G.,
Bower C. A.
Publication year - 1965
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1965.03615995002900010009x
Subject(s) - sulfate , organic matter , soil water , chemistry , salinity , arid , environmental chemistry , soil organic matter , waterlogging (archaeology) , agronomy , environmental science , soil science , ecology , biology , wetland , organic chemistry
The effect of native and applied organic matter (straw) on sulfate reduction under anaerobic conditions in arid‐zone soils was studied in the laboratory. Changes in the composition of dissolved and adsorbed ions as a consequence of SO 4 reduction was also studied. The results indicate that SO 4 ‐reducing microorganisms are generally present in arid‐zone soils. Appreciable reduction of any SO 4 present does not occur when arid‐zone soils become anaerobic by waterlogging, however, unless undecomposed organic matter (plant residue) is present or the soil organic matter content is high (e.g., > 5%). Sulfate reduction results in the formation of equivalent amounts of carbonates which, upon reaction with soluble or exchangeable Ca and precipitation as CaCO 3 , cause decreases in soil salinity and increases in the exchangeable sodium percentage.