干旱区生态环境知识资源中心(Arid): On the spatial variability and influencing factors of soil organic carbon and total nitrogen stocks in a desert oasis ecotone of northwestern China

Arid

DOI	10.1016/j.catena.2021.105533
	On the spatial variability and influencing factors of soil organic carbon and total nitrogen stocks in a desert oasis ecotone of northwestern China
	Cao, Qiqi; Li, Junran; Wang, Guan; Wang, Dong; Xin, Zhiming; Xiao, Huijie; Zhang, Kebin
通讯作者	Xiao, HJ ; Zhang, KB (corresponding author), Beijing Forestry Univ, Coll Soil & Water Conservat, Qinghua East Rd 35, Beijing 100083, Peoples R China.
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2021
卷号	206
英文摘要	Accurate assessments of soil organic carbon (SOC) and total nitrogen (TN) stocks and controlling factors are essential for understanding carbon and nitrogen sequestration in soil. In this study, we analyzed the spatial distribution and influencing factors of SOC and TN stocks to the depth of 3 m in a desert oasis ecotone of northwestern China. The study area has experienced large-scale transition of dunelands to irrigated croplands in the past 40-50 years. The results showed that the vertical distributions of SOC and TN stocks were well demonstrated by quadratic function forms. The SOC and TN stocks at 0-3 m depths in nabkha dunes were generally significantly higher than that in bare sand dunes. Additionally, after converting nabkha dunes to croplands, both SOC and TN stocks at the top 0.4 m depths increased with the extension of cultivation years, the mean SOC and TN stocks significantly increased from 0.396 to 0.992 kg.m(-2) and from 0.053 to 0.096 kg.m(-2), respectively. The strongest heterogeneity of SOC and TN generally appeared at top 0-0.4 m depths and decreased with the depth. The SOC and TN stocks in the nabkha dunes near the water areas were relatively higher, which may be suitable for croplands reclamation. It is noteworthy that land use brought a major influence of SOC and TN at top 0-0.4 m depths, whereas soil texture (clay and silt contents) was the main factor that controlled SOC and TN at deep soil depths (1-3 m). The results indicate that the nabkha dunes also increased carbon and nitrogen stocks throughout the entire 3 m soil profiles. While the demand for food is almost certain to increase in arid and semiarid China and other regions worldwide, the conversion from non-traditional croplands such as dunelands to croplands is likely going to continue.
英文关键词	Soil organic carbon and total nitrogen Spatial distribution Land use change Deep soil
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000688449100042
WOS关键词	LOESS PLATEAU REGION ; FOREST SOILS ; LAND-USE ; DEEP PROFILES ; CLIMATE ; STORAGE ; MATTER ; HETEROGENEITY ; RESTORATION ; RESPIRATION
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362796
作者单位	[Cao, Qiqi; Wang, Guan; Wang, Dong; Xiao, Huijie; Zhang, Kebin] Beijing Forestry Univ, Coll Soil & Water Conservat, Qinghua East Rd 35, Beijing 100083, Peoples R China; [Li, Junran] Univ Tulsa, Dept Geosci, Tulsa, OK 74104 USA; [Xin, Zhiming] Dengkou Desert Ecosyst Res Stn Inner Mongolia, Expt Ctr Desert Forestry, Dengkou 015200, Peoples R China
推荐引用方式 GB/T 7714	Cao, Qiqi,Li, Junran,Wang, Guan,et al. On the spatial variability and influencing factors of soil organic carbon and total nitrogen stocks in a desert oasis ecotone of northwestern China[J]. 北京林业大学,2021,206.
APA	Cao, Qiqi.,Li, Junran.,Wang, Guan.,Wang, Dong.,Xin, Zhiming.,...&Zhang, Kebin.(2021).On the spatial variability and influencing factors of soil organic carbon and total nitrogen stocks in a desert oasis ecotone of northwestern China.CATENA,206.
MLA	Cao, Qiqi,et al."On the spatial variability and influencing factors of soil organic carbon and total nitrogen stocks in a desert oasis ecotone of northwestern China".CATENA 206(2021).