Distribution Characteristics of Soil Organic Carbon (SOC)and Its Isotopic Composition for Soil Profiles of Loess Plateau under Different Vegetation Conditions
详细信息
- 责任者：Li Longbo (State Key Laboratory of Environmental Geochemistry ; Institute of Geochemistry ; Chinese Academy of Sciences ; Guiyang 550002 ; China) ; Tu Chenglong
- 刊名：Earth and Environment
- 出版年：2011
- 卷期：39(4)
- 关键词：土壤 ; soils ; 有机碳 ; organic carbon ; 黄土高原 ; Loess Plateau
- 页码：p.441-449
- 图表：4 illus., 2 tables, 44 refs.
- 分类号：1800
- 出版序号：20122721
- issnNo：ISSN1672-9250
- isbnNo：CN52-1139/P
摘要
In this paper, five typical soil profiles under different vegetation conditions in loess areas, Northwest China, were selected as a case to study the profile distribution and stable isotopic composition in terms of the physical properties and carbon isotopic composition of foliage, litter and SOC. The results showed that the SOC was mainly enriched in surface soils and decreased with increasing depth. SOC contents varied in the range of 1.1~31.2 g/kg. The results indicated that there existed significant differences in vertical patterns of SOC contents and δ13C values of SOC between different soil profiles. The stable carbon isotope geochemistry of soil organic matter shows distinct regional characteristics in loess areas.