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
卷号	50 期号:7 页码:1103-1114
文章类型	Article
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.
关键词	Tibetan Plateau Alpine Meadow Soil Organic Carbon Co2 Flux C-14 Signature
WOS标题词	Science & Technology ; Physical Sciences
学科领域	生物科学
关键词[WOS]	TIBETAN PLATEAU ; TURNOVER RATES ; LAND-USE ; RADIOCARBON ; VEGETATION ; GRASSLAND ; CHINA ; RESPIRATION ; EXCHANGE ; IMPACT
收录类别	SCI
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000247977700016
引用统计	被引频次：19[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/1260
专题	中国科学院西北高原生物研究所
作者单位	1.Sun Yat Sen Univ, Sch Geog & Planning, Guangzhou 510275, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 3.Chinese Acad Sci, NW Plateau Inst Biol, Xining 810001, Peoples R China
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,2007,50(7):1103-1114.
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,50(7),1103-1114.
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 50.7(2007):1103-1114.

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