Composition of Suplhur Pool in Selected Upland Soils in North China

摘要

Solid sulfur fractions, including monocalcium phosphate-extractable S, slowly soluble inorganic S, C-O-S, C-bonded S and unidentified organic S, were analyzed for 48 soils, as representatives of 6 major groups of upland soils, fluvisol, cinnamon soil, loessial soil, chestnut soil, black soil and brown soil, in North China. The contents of total S and monocalcium phosphate-extractable S in the above 48 solils ranged from 234 to 860 and 5.1 to 220.3 mg kg~-1, respectively, and each of 6 soil groups contained the samples with a low level of phosphate-extractable S.