Oxidation of elemental sulphur in red non-calcareous (Typic Haplustalf) soil

摘要

A laboratory experiment was conducted to examine the oxidation of elemental sulphur (S~o) in a red non - calcareous (Typic Haplustalf) soil. Different levels of S~o (60 and 100 mesh size) at a rate equivalent to 1000, 5000 and 10000 mg kg~(-1) were thoroughly mixed with soil and incubated for 120 days at 25 deg C+2 deg C. The oxidation was measured by the increase in the concentration of sulphur (SO_4-S) in soil. The highest oxidation of 46.3 per cent was achieved when S~ was added as finer particles (100 mesh) at a rate of 1000 mg S~o kg~(-1) soil. The S~o oxidation also resulted marked reduction in soil pH.