Soil organic carbon on the fragmented Chinese Loess Plateau: Combining effects of vegetation types and topographic positions

doi:10.1016/j.still.2017.05.005

ISWC OpenIR > 水保所科研产出--SCI > 2017--SCI

	Soil organic carbon on the fragmented Chinese Loess Plateau: Combining effects of vegetation types and topographic positions
	Wang, Zhiqi 1,2; Hu, Yaxian 1; Wang, Rui 1; Guo, Shengli 1; Du, Lanlan 1; Zhao, Man 1; Yao, Zhihong 2; Guo, SL (reprint author), Inst Soil & Water Conservat, Xinong Rd 26, Yangling 712100, Shaanxi, Peoples R China.
文章类型	Article
	2017
发表期刊	SOIL & TILLAGE RESEARCH
ISSN	0167-1987
通讯作者邮箱	slguo@ms.iswc.ac.cn
卷号	174 页码:1-5
摘要	The influence of vegetation coverage and topography on soil organic carbon (SOC) stocks has been intensively studies. However, very few of the studies have recognized the potential combining effects of vegetation types and topographic positions onto SOC distribution, especially on the Chinese Loess Plateau where vegetation recovery has generated complex combination of fragmented topography and vegetation coverage. This study systematically sampled soil cores (259) from four vegetation types (woodland, grassland, cropland, and orchard) at three topographic positions (tableland, slope and valley bottom). Each soil core was divided into three layers: surface soil (0-20 cm), subsoil (20-60 cm) and deep soil (60-200 cm). Our results show that: (1) the SOC concentration declined over soil depths, regardless topographic positions or vegetation types. The absence of ancient cultivation layers at the valley bottoms further made the SOC stocks deep to 200 cm there much less than the tableland with thick loess soil layers (8.3 kg km(-2) vs. 13.4 kg km(-2)). (2) The SOC concentration of cropland varied evidently with topographic positions, with the greatest on the tableland (8.0 g kg(-1)), and the least along the slope (5.3 g ko. However, grassland was rather stable across the three topographic positions. (3) In addition, the SOC concentrations of the three vegetation types were comparable on the tableland (6.1 g kg(-1)), while differed noticeably at the valley bottoms (5.0 g kg(-1)). Overall, our findings in this study call for the account for each combination of topographic position and vegetation type, so as to properly assess regional SOC stocks for sustainable land use.
关键词	Soil Organic Carbon Fragmented Topography Spatial Distribution Land Use
学科领域	Agriculture
DOI	10.1016/j.still.2017.05.005
URL	查看原文
收录类别	SCI
出版地	AMSTERDAM
语种	英语
WOS记录号	WOS:000412265800001
出版者	ELSEVIER SCIENCE BV
项目资助者	Natural Science Foundation of China [41371279]; Fundamental Research Funds of Northwest A F University [2452017191] ; Natural Science Foundation of China [41371279]; Fundamental Research Funds of Northwest A F University [2452017191]
引用统计	被引频次：13[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	sbir.nwafu.edu.cn/handle/361005/7883
专题	水保所科研产出--SCI_2017--SCI
通讯作者	Guo, SL (reprint author), Inst Soil & Water Conservat, Xinong Rd 26, Yangling 712100, Shaanxi, Peoples R China.
作者单位	1.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.North China Univ Water Resources & Elect Power, Sch Resources & Environm, Zhengzhou 450045, Henan, Peoples R China
推荐引用方式 GB/T 7714	Wang, Zhiqi,Hu, Yaxian,Wang, Rui,et al. Soil organic carbon on the fragmented Chinese Loess Plateau: Combining effects of vegetation types and topographic positions[J]. SOIL & TILLAGE RESEARCH,2017,174:1-5.
APA	Wang, Zhiqi.,Hu, Yaxian.,Wang, Rui.,Guo, Shengli.,Du, Lanlan.,...&Guo, SL .(2017).Soil organic carbon on the fragmented Chinese Loess Plateau: Combining effects of vegetation types and topographic positions.SOIL & TILLAGE RESEARCH,174,1-5.
MLA	Wang, Zhiqi,et al."Soil organic carbon on the fragmented Chinese Loess Plateau: Combining effects of vegetation types and topographic positions".SOIL & TILLAGE RESEARCH 174(2017):1-5.