Soil organic carbon storage and soil CO2 flux in the alpine meadow ecosystem

NWIPB OpenIR

	Soil organic carbon storage and soil CO2 flux in the alpine meadow ecosystem
	Tao Zhen ; Shen ChengDe ; Gao QuanZhou ; Sun YanMin ; Yi WeiXi ; Li YingNian
	2007-06-01
发表期刊	SCIENCE IN CHINA SERIES D-EARTH SCIENCES ; Tao Zhen,Shen ChengDe,Gao QuanZhou,Sun YanMin, Yi WeiXi,Li YingNian.Soil organic carbon storage and soil CO2 flux in the alpine meadow ecosystem.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2007,50(7):1103-1114
摘要	High-resolution sampling, measurements of organic carbon contents and C-14 signatures of selected four soil profiles in the Haibei Station situated on the northeast Tibetan Plateau, and application of C-14 tracing technology were conducted in an attempt to investigate the turnover times of soil organic carbon and the soil-CO2 flux in the alpine meadow ecosystem. The results show that the organic carbon stored in the soils varies from 22.12x10(4) kg C hm(-2) to 30.75x10(4) kg C hm(-2) in the alpine meadow ecosystems, with an average of 26.86x10(4) kg C hm(-2). Turnover times of organic carbon pools increase with depth from 45 a to 73 a in the surface soil horizon to hundreds of years or millennia or even longer at the deep soil horizons in the alpine meadow ecosystems. The soil-CO2 flux ranges from 103.24 g C m(-2) a(-1) to 254.93 gC m(-2) a(-1), with an average of 191.23 g C m(-2) a(-1). The CO2 efflux produced from microbial decomposition of organic matter varies from 73.3 g C m(-2) a(-1) to 181 g C m(-2) a(-1). More than 30% of total soil organic carbon resides in the active carbon pool and 72.8%. 81.23% of total CO2 emitted from organic matter decomposition results from the topsoil horizon (from 0 cm to 10 cm) for the Kobresia meadow. Responding to global warming, the storage, volume of flow and fate of the soil organic carbon in the alpine meadow ecosystem of the Tibetan Plateau will be changed, which needs further research.; High-resolution sampling, measurements of organic carbon contents and C-14 signatures of selected four soil profiles in the Haibei Station situated on the northeast Tibetan Plateau, and application of C-14 tracing technology were conducted in an attempt to investigate the turnover times of soil organic carbon and the soil-CO2 flux in the alpine meadow ecosystem. The results show that the organic carbon stored in the soils varies from 22.12x10(4) kg C hm(-2) to 30.75x10(4) kg C hm(-2) in the alpine meadow ecosystems, with an average of 26.86x10(4) kg C hm(-2). Turnover times of organic carbon pools increase with depth from 45 a to 73 a in the surface soil horizon to hundreds of years or millennia or even longer at the deep soil horizons in the alpine meadow ecosystems. The soil-CO2 flux ranges from 103.24 g C m(-2) a(-1) to 254.93 gC m(-2) a(-1), with an average of 191.23 g C m(-2) a(-1). The CO2 efflux produced from microbial decomposition of organic matter varies from 73.3 g C m(-2) a(-1) to 181 g C m(-2) a(-1). More than 30% of total soil organic carbon resides in the active carbon pool and 72.8%. 81.23% of total CO2 emitted from organic matter decomposition results from the topsoil horizon (from 0 cm to 10 cm) for the Kobresia meadow. Responding to global warming, the storage, volume of flow and fate of the soil organic carbon in the alpine meadow ecosystem of the Tibetan Plateau will be changed, which needs further research.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/35480
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Tao Zhen,Shen ChengDe,Gao QuanZhou,et al. Soil organic carbon storage and soil CO2 flux in the alpine meadow ecosystem[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES, Tao Zhen,Shen ChengDe,Gao QuanZhou,Sun YanMin, Yi WeiXi,Li YingNian.Soil organic carbon storage and soil CO2 flux in the alpine meadow ecosystem.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2007,50(7):1103-1114,2007.
APA	Tao Zhen,Shen ChengDe,Gao QuanZhou,Sun YanMin,Yi WeiXi,&Li YingNian.(2007).Soil organic carbon storage and soil CO2 flux in the alpine meadow ecosystem.SCIENCE IN CHINA SERIES D-EARTH SCIENCES.
MLA	Tao Zhen,et al."Soil organic carbon storage and soil CO2 flux in the alpine meadow ecosystem".SCIENCE IN CHINA SERIES D-EARTH SCIENCES (2007).