干旱区生态环境知识资源中心(Arid): Changes of soil organic carbon stocks from the 1980s to 2018 in northern China's agro-pastoral ecotone

Arid

DOI	10.1016/j.catena.2020.104722
	Changes of soil organic carbon stocks from the 1980s to 2018 in northern China's agro-pastoral ecotone
	Wang, Xuyang; Li, Yuqiang; Gong, Xiangwen; Niu, Yayi; Chen, Yinping; Shi, Xiaoping; Li, Wei; Liu, Jing
通讯作者	Li, YQ
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2020
卷号	194
英文摘要	Soil carbon sequestration and potential sequestration are key issues in global carbon research, as the size of the soil organic carbon (SOC) stocks and their changes over time are important for understanding their role in climate change. In northern China's agro-pastoral ecotone, we compared SOC data derived from 238 sampling sites during China's National Soil Inventory in the 1980s with the results of field surveys at 644 sites in 2018 to calculate the changes in SOC stocks between the 1980s and 2018. We found that the mean SOC stock to a depth of 30 cm decreased significantly, from 4.48 kg C m(-2) in the 1980s to 3.60 kg C m(-2) in 2018, and the total SOC stock decreased from 2793.17 Tg to 2248.34 Tg. This amounted to an average decrease of 27.74 g C m(-2) yr(-1) over the 30-year study period. Furthermore, we used a land use and cover change transition matrix to quantify the amount of SOC change caused by these transitions; the SOC reduction could be mainly ascribed to overgrazing, grassland reclamation for agriculture, and grassland desertification. Large-scale ecological restoration projects have increased SOC reserves, but not enough to compensate for the loss of SOC caused by factors such as desertification and ecosystem degradation. We also performed regression analysis for the relationship between the change in the SOC stock and the rates of temperature and precipitation change. We found that increasing temperature non-significantly decreased SOC, whereas precipitation was significantly (P < 0.05) related to SOC change, but the R-2 was very low (0.01). Our analysis suggests that humans have affected SOC in northern China's agro-pastoral ecotone more strongly than climatic factors.
英文关键词	Soil organic carbon (SOC) Total SOC stock Climate change Land use/cover change Agro-pastoral ecotone
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000566699000055
WOS关键词	NITROGEN STOCKS ; INNER-MONGOLIA ; SPATIAL-DISTRIBUTION ; GRASSLAND SOILS ; DRIVING FACTORS ; LOESS PLATEAU ; SAND DUNES ; LAND-USE ; STORAGE ; SEQUESTRATION
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326086
作者单位	[Wang, Xuyang; Li, Yuqiang; Niu, Yayi; Liu, Jing] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, 320 Donggang West Rd, Lanzhou 730000, Peoples R China; [Wang, Xuyang; Niu, Yayi] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Li, Yuqiang] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Naiman Desertificat Res Stn, Tongliao 028300, Peoples R China; [Gong, Xiangwen] Chongqing Inst Geol & Mineral Resources, Wan Sheng Min Chongqing Conservat & Repair Ecol E, Chongqing 400042, Peoples R China; [Chen, Yinping; Shi, Xiaoping] Lanzhou Jiaotong Univ, Sch Environm & Municipal Engn, Lanzhou 730070, Peoples R China; [Li, Wei] Northwest Agr & Forestry Univ, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xuyang,Li, Yuqiang,Gong, Xiangwen,et al. Changes of soil organic carbon stocks from the 1980s to 2018 in northern China's agro-pastoral ecotone[J]. 西北农林科技大学,2020,194.
APA	Wang, Xuyang.,Li, Yuqiang.,Gong, Xiangwen.,Niu, Yayi.,Chen, Yinping.,...&Liu, Jing.(2020).Changes of soil organic carbon stocks from the 1980s to 2018 in northern China's agro-pastoral ecotone.CATENA,194.
MLA	Wang, Xuyang,et al."Changes of soil organic carbon stocks from the 1980s to 2018 in northern China's agro-pastoral ecotone".CATENA 194(2020).