Soil Organic Carbon Stock and Distribution in Cultivated Land Converted to Grassland in a Subtropical Region of China

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Soil Organic Carbon Stock and Distribution in Cultivated Land Converted to Grassland in a Subtropical Region of China
	Zhang, J. H.1,2,3 ; Li, F. C.1,2,3 ; Wang, Y.1,2,3 ; Xiong, D. H.1,2,3
刊名	ENVIRONMENTAL MANAGEMENT
	2014-02-01
卷号	53 期号:2 页码:274-283
关键词	Soil organic carbon Cultivated soil Land conversion Landscape position Soil erosion Sloping field
ISSN号	0364-152X
通讯作者	J. H. Zhang
英文摘要	Land-use change from one type to another affects soil carbon (C) stocks which is associated with fluxes of CO2 to the atmosphere. The 10-years converted land selected from previously cultivated land in hilly areas of Sichuan, China was studied to understand the effects of land-use conversion on soil organic casrbon (SOC) sequestration under landscape position influences in a subtropical region of China. The SOC concentrations of the surface soil were greater (P < 0.001) for converted soils than those for cultivated soils but lower (P < 0.001) than those for original uncultivated soils. The SOC inventories (1.90-1.95 kg m(-2)) in the 0-15 cm surface soils were similar among upper, middle, and lower slope positions on the converted land, while the SOC inventories (1.41-1.65 kg m(-2)) in this soil layer tended to increase from upper to lower slope positions on the cultivated slope. On the whole, SOC inventories in this soil layer significantly increased following the conversion from cultivated land to grassland (P < 0.001). In the upper slope positions, converted soils (especially in 0-5 cm surface soil) exhibited a higher C/N ratio than cultivated soils (P = 0.012), implying that strong SOC sequestration characteristics exist in upper slope areas where severe soil erosion occurred before land conversion. It is suggested that landscape position impacts on the SOC spatial distribution become insignificant after the conversion of cultivated land to grassland, which is conducive to the immobilization of organic C. We speculate that the conversion of cultivated land to grassland would markedly increase SOC stocks in soil and would especially improve the potential for SOC sequestration in the surface soil over a moderate period of time (10 years).
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Environmental Sciences
研究领域[WOS]	Environmental Sciences & Ecology
关键词[WOS]	TILLAGE EROSION ; LONG-TERM ; TOTAL NITROGEN ; LANDSCAPE ; REDISTRIBUTION ; IMPACTS ; STORAGE ; VEGETATION ; CHERNOZEM ; HILLSLOPE
收录类别	SCI
原文出处	http://link.springer.com/article/10.1007%2Fs00267-013-0181-y
语种	英语
WOS记录号	WOS:000330343000004
公开日期	2014-01-21
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/6794]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
作者单位	1.Chinese Acad Sci, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China 3.Minist Water Conservancy & Power, Chengdu 610041, Peoples R China
推荐引用方式 GB/T 7714	Zhang, J. H.,Li, F. C.,Wang, Y.,et al. Soil Organic Carbon Stock and Distribution in Cultivated Land Converted to Grassland in a Subtropical Region of China[J]. ENVIRONMENTAL MANAGEMENT,2014,53(2):274-283.
APA	Zhang, J. H.,Li, F. C.,Wang, Y.,&Xiong, D. H..(2014).Soil Organic Carbon Stock and Distribution in Cultivated Land Converted to Grassland in a Subtropical Region of China.ENVIRONMENTAL MANAGEMENT,53(2),274-283.
MLA	Zhang, J. H.,et al."Soil Organic Carbon Stock and Distribution in Cultivated Land Converted to Grassland in a Subtropical Region of China".ENVIRONMENTAL MANAGEMENT 53.2(2014):274-283.