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Soil Organic Carbon Stocks in Deep Soils at a Watershed Scale on the Chinese Loess Plateau
Wang, Yunqiang1; Han, Xiangwei2; Jin, Zhao1; Zhang, Chencheng3; Fang, Linchuan3
2016
Source PublicationSOIL SCIENCE SOCIETY OF AMERICA JOURNAL
Volume80Issue:1Pages:157-167
SubtypeArticle
AbstractAn accurate evaluation of soil organic C (SOC) stocks is important to C management and to understanding fully the role of soils in the C cycle. However, SOC stocks in deep soils and the factors that affect them have been largely ignored. We measured SOC stocks and other soil properties to a depth of 500 cm (n = 73) under three land uses in the Lao Ye Man Qu watershed on the Chinese Loess Plateau. Similar patterns in the vertical distributions of SOC stocks were found under cropland, grassland, and shrubland. However, for the 0-to 200-cm soil layer, SOC stocks were significantly lower under shrubland than under either cropland or grassland. The SOC stocks under cropland, grassland, and shrubland in the 0-to 100-cm layer were 2.64 +/- 0.67, 2.50 +/- 0.69, and 1.99 +/- 0.22 kg m(-2), respectively; in the 0-to 500-cm layer they were 8.34 +/- 2.26, 8.37 +/- 2.01, and 7.26 +/- 1.00 kg m(-2), respectively. Significantly higher SOC stocks occurred in loamy than sandy soils (P < 0.01), and they were lower at the mid than at the upper and lower slope positions. However, SOC stocks were similar in sunlit and shaded soils. Pearson correlation analysis indicated that land use, soil texture, and soil water content significantly affected SOC stocks in each 100-cm soil layer to a depth of 500 cm. Effects of topographic features and pH varied with increasing depth. A considerable amount of SOC was stored in deep soils, indicating the SOC content dependence on time and depth. This information is essential for evaluating C fluxes, estimating C stocks, and for managing the C cycles in regions around the world with deep soils.
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.2136/sssaj2015.06.0220
WOS KeywordMITIGATE CLIMATE-CHANGE ; LAND-USE CONVERSION ; VERTICAL-DISTRIBUTION ; AGRICULTURAL SOILS ; RESIDUE MANAGEMENT ; SEMIARID REGION ; FOOD SECURITY ; BULK-DENSITY ; STORAGE ; SEQUESTRATION
Indexed BySCI
Language英语
WOS Research AreaAgriculture
WOS SubjectSoil Science
WOS IDWOS:000372517700016
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5801
Collection生态环境研究室
Affiliation1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China
2.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
3.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Inst Soil & Water Conservat, Yangling 712100, Peoples R China
Recommended Citation
GB/T 7714
Wang, Yunqiang,Han, Xiangwei,Jin, Zhao,et al. Soil Organic Carbon Stocks in Deep Soils at a Watershed Scale on the Chinese Loess Plateau[J]. SOIL SCIENCE SOCIETY OF AMERICA JOURNAL,2016,80(1):157-167.
APA Wang, Yunqiang,Han, Xiangwei,Jin, Zhao,Zhang, Chencheng,&Fang, Linchuan.(2016).Soil Organic Carbon Stocks in Deep Soils at a Watershed Scale on the Chinese Loess Plateau.SOIL SCIENCE SOCIETY OF AMERICA JOURNAL,80(1),157-167.
MLA Wang, Yunqiang,et al."Soil Organic Carbon Stocks in Deep Soils at a Watershed Scale on the Chinese Loess Plateau".SOIL SCIENCE SOCIETY OF AMERICA JOURNAL 80.1(2016):157-167.
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