| 华北某些旱地硫库的组成 |
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| 引用本文： | ZHOU Wei,LIN Bao,WANG Hong,LI Shu-Tian,HE Ping. 华北某些旱地硫库的组成[J]. 土壤圈, 1999, 9(2): 123-130 |
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| 作者姓名： | ZHOU Wei LIN Bao WANG Hong LI Shu-Tian HE Ping |
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| 作者单位： | [1]InstituteofSoilandFertilizer,ChineseAcademyofAgriculturalSciences,Beijing,100081，China [2]InstituteofSo,ChineseAcademyofAgriculturalSciences,Beijing,100081，China |
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| 基金项目： | *1Project (grant No.C/2534-1) supported by the International Foundation for Science. |
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| 摘 要： | Soil 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-extractalble S in the above 48 soils ranged from 234 to 860 and 5.1to 220.3mg kg^-1,respectively and each of 6 soil groups contained the samples with a low level of phosphate-extractable S.Great differences in the average contents of each fraction of S were observed among the above 6 soil groups.Expressed as average percentage of the total S in soils,fluvisols,cinnamon soils,loessial soils,chestnut soils,black soils and brown soils contained 6.1%,9.5%,5.7%,13.2%,3.5%and 6.8% monocalcium phosphate-extractable S,5.7%,3.0%,9.3%,10.4%,3.2%and 3.1% slowly soluble inorganic S,51.6%,26.7%,17.4%,31.2%,28.9%and 22.7% C-O-S,11.0%,9.1%,6.6%,6.8%,9.7%and 9.4% in C-bonded S,and 25.6%,51.7%,60.8%,38.4%,54.7%and 53.0% unidentifed organic S,respectively,FOr the above 6 groups of soils,the mean C/N ratios were remarkably similar,ranging from 9.7 to 10.7,while the mean N/S ratios ranged from 1.16 to 3.12,The highest ratios of C/N,C/C-O-S and C/C-bonded S were found in black soils.averaging 30.4,104.9and 314.7,respectively,while the lowest ratios arose in chestnut soil,averaging 12.4,39.7 and 183.3,respectively.
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| 关 键 词： | 中国 北方地区 高地土壤 土壤成分 C结合S C－O－S 硫酸盐 硫库 |
Composition of sulphur pool in selected upland soils in North China |
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| ZHOU Wei,LIN Bao,WANG Hong,LI Shu-Tian and HE Ping. Composition of sulphur pool in selected upland soils in North China[J]. Pedosphere, 1999, 9(2): 123-130 |
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| Authors: | ZHOU Wei LIN Bao WANG Hong LI Shu-Tian HE Ping |
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| Affiliation: | Institute of Soil and Fertilizer, Chinese Academy of Agriculturol Sciences, Beijing 100081 (China);Institute of Soil and Fertilizer, Chinese Academy of Agriculturol Sciences, Beijing 100081 (China);Institute of Soil and Fertilizer, Chinese Academy of Agriculturol Sciences, Beijing 100081 (China);Institute of Soil and Fertilizer, Chinese Academy of Agriculturol Sciences, Beijing 100081 (China);Institute of Soil and Fertilizer, Chinese Academy of Agriculturol Sciences, Beijing 100081 (China) |
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| Abstract: | Soil 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-extractalble S in the above 48 soils ranged from 234 to 860 and 5.1to 220.3mg kg^-1,respectively and each of 6 soil groups contained the samples with a low level of phosphate-extractable S.Great differences in the average contents of each fraction of S were observed among the above 6 soil groups.Expressed as average percentage of the total S in soils,fluvisols,cinnamon soils,loessial soils,chestnut soils,black soils and brown soils contained 6.1%,9.5%,5.7%,13.2%,3.5%and 6.8% monocalcium phosphate-extractable S,5.7%,3.0%,9.3%,10.4%,3.2%and 3.1% slowly soluble inorganic S,51.6%,26.7%,17.4%,31.2%,28.9%and 22.7% C-O-S,11.0%,9.1%,6.6%,6.8%,9.7%and 9.4% in C-bonded S,and 25.6%,51.7%,60.8%,38.4%,54.7%and 53.0% unidentifed organic S,respectively,FOr the above 6 groups of soils,the mean C/N ratios were remarkably similar,ranging from 9.7 to 10.7,while the mean N/S ratios ranged from 1.16 to 3.12,The highest ratios of C/N,C/C-O-S and C/C-bonded S were found in black soils.averaging 30.4,104.9and 314.7,respectively,while the lowest ratios arose in chestnut soil,averaging 12.4,39.7 and 183.3,respectively. |
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| Keywords: | C-bonded S C-O-S sulphate upland soil |
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