| 重庆地区黄壤中硫形态的分组和硫酸盐的吸附特性 |
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| 引用本文： | 宁毅,程伯容.重庆地区黄壤中硫形态的分组和硫酸盐的吸附特性[J].环境科学学报,1988,8(2):179-185. |
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| 作者姓名： | 宁毅 程伯容 |
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| 作者单位： | 中国科学院林业土壤研究所，中国科学院林业土壤研究所 中国科学院生态环境研究中心 |
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| 摘 要： | 研究了重庆地区森林植被下的黄壤对SO_4~(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,下面的层次较低。NaH_2PO_4-S,OA_0~-S的含量范围分别是27.95—105.17ppm,23.79—86.64ppm,这两种硫都是随土壤深度的增加而增加。大部分土样的NaH_2PO_4-S都高于OAc~--S。NaH_2PO_4-S中绝大部分是可溶性硫而不是吸附态硫。NaH_2PO_4-S含量较高的原因可能是当地酸性沉降物输入SO_4~(2-)的结果。由负吸附转向正吸附时的SO_4~(2-)溶液浓度比较高。下层土壤比上层土壤吸附更多的SO_4~(2-)。各剖面点土样对SO_4~(2-)的吸附顺序是:缙云山土壤>山洞土壤>南山土壤。
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| 关 键 词： | 硫 吸附 分组 酸性沉降 黄壤 |
| 收稿时间： | 1987/5/22 0:00:00 |
SULFUR DISTRIBUTION AND FRACTIONATION IN YELLOW SOILS FROM CHONGQING AREA |
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| Ning Yi and Chong Borong.SULFUR DISTRIBUTION AND FRACTIONATION IN YELLOW SOILS FROM CHONGQING AREA[J].Acta Scientiae Circumstantiae,1988,8(2):179-185. |
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| Authors: | Ning Yi and Chong Borong |
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| Affiliation: | Institute of Forestry and Soil Science, Academia Sinica, Shenyang and Institute of Forestry and Soil Science, Academia Sinica, Shenyang |
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| 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. |
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| Keywords: | sulfur fractionation acid precipitation yellow soil |
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