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研究论文

摘要：研究了重庆地区森林植被下的黄壤对SO₄^2-的吸附特性和硫形态分组。全硫的含量范围是98.75—259.25ppm,平均值是147.72ppm。全硫在土壤剖面中的分布和有机质不一致。分析的土样中碳键硫的最小值、最大值和平均值分别是21.05,82.50和43.00ppm,硫酸酯硫形态含量的最小值、最大值和平均值分别是12.08,115.38和49.67ppm。土壤中碳键硫和硫酸酯形态硫的比值变化很大,从0.26到3.14。碳键硫、硫酸酯硫在土壤中的分布是第一层较高

Abstract：The distribution and the fractionation of sulfur in yellow soils under forests in Chongqing area were studied. The total contents of sulfur were found in a range of 36.00 to 259.25 mg/kg with a mean value of 155.10 mg/kg. There is more sulfur in subsoil than that in surface soil. The average contents of carbon-bound sulfur and ester sulfate sulfur are 43.00 (21.50-82.50) mg/kg and 49.67(12.08-115.38) mg/kg respectively and their contents in surface soils are higher than that in subsoils. The contents of NaH₂PO₄-S and OAc-S increase as the depth increases and fall into ranges of 27.95 to 105.17 and 23.79 to 86.64 mg/kg respectively. The high concentration of NaH₂PO₄-S may be caused by acid precipitation. The sulfur content in soils from diffrent regions of the area rank as follows; Jinyun mountain > Shandine > Nanshan.