Soil Organic Carbon Stocks in Deep Soils at a Watershed Scale on the Chinese Loess Plateau

doi:10.2136/sssaj2015.06.0220

	Soil Organic Carbon Stocks in Deep Soils at a Watershed Scale on the Chinese Loess Plateau
	Fang, Linchuan 1; Zhang, Chencheng 1; Jin, Zhao 3; Han, Xiangwei 2; Wang, Yunqiang 3
刊名	SOIL SCIENCE SOCIETY OF AMERICA JOURNAL
	2016
卷号	80 期号:1 页码:157-167
DOI	10.2136/sssaj2015.06.0220
文献子类	Article
英文摘要	An 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关键词	MITIGATE CLIMATE-CHANGE ; LAND-USE CONVERSION ; VERTICAL-DISTRIBUTION ; AGRICULTURAL SOILS ; RESIDUE MANAGEMENT ; SEMIARID REGION ; FOOD SECURITY ; BULK-DENSITY ; STORAGE ; SEQUESTRATION
WOS研究方向	Agriculture
语种	英语
WOS记录号	WOS:000372517700016
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/5801]
专题	地球环境研究所_生态环境研究室
作者单位	1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Inst Soil & Water Conservat, Yangling 712100, 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.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Fang, Linchuan,Zhang, Chencheng,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	Fang, Linchuan,Zhang, Chencheng,Jin, Zhao,Han, Xiangwei,&Wang, Yunqiang.(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	Fang, Linchuan,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.