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Library Soil inorganic carbon storage pattern in China

Soil inorganic carbon storage pattern in China

Soil inorganic carbon storage pattern in China

Resource information

Date of publication
December 2008
Resource Language
ISBN / Resource ID
AGRIS:US201301539773
Pages
2380-2387

Soils with pedogenic carbonate cover about 30% (3.44 x 10⁶ km²) of China, mainly across its arid and semiarid regions in the Northwest. Based on the second national soil survey (1979-1992), total soil inorganic carbon (SIC) storage in China was estimated to be 53.3±6.3 PgC (1 Pg=10¹⁵ g) to the depth investigated to 2 m. Soil inorganic carbon storages were 4.6, 10.6, 11.1, and 20.8 Pg for the depth ranges of 0-0.1, 0.1-0.3, 0.3-0.5, and 0.5-1 m, respectively. Stocks for 0.1, 0.3, 0.5, and 1 m of depth accounted for 8.7%, 28.7%, 49.6%, and 88.9% of total SIC, respectively. In contrast with soil organic carbon (SOC) storage, which is highest under 500-800 mm yr⁻¹ of mean precipitation, SIC storage peaks where mean precipitation is shrubland, cropland >marsh, forest, meadow. Densities of SIC increased generally with depth in all ecosystem types with the exception of deserts and marshes where it peaked in intermediate layers (0.1-0.3 m for first and 0.3-0.5 m for latter). Being an abundant component of soil carbon stocks in China, SIC dynamics and the process involved in its accumulation or loss from soils require a better understanding.

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Authors and Publishers

Author(s), editor(s), contributor(s)

MI, NA
WANG, SHAOQIANG
LIU, JIYUAN
YU, GUIRUI
ZHANG, WENJUAN
JOBBÁGY, ESTEBAN

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Data Provider
Geographical focus