干旱区生态环境知识资源中心(Arid): Desertification control on soil inorganic and organic carbon accumulation in the topsoil of desert grassland in Ningxia, northwest China

Arid

DOI	10.1016/j.ecoleng.2018.12.014
	Desertification control on soil inorganic and organic carbon accumulation in the topsoil of desert grassland in Ningxia, northwest China
	An, Hui 1; Li, Qiao-Ling 2; Yan, Xin 1; Wu, Xiu-Zhi 1; Liu, Ren-tao 1; Fang, Yan 1,3
通讯作者	Fang, Yan
来源期刊	ECOLOGICAL ENGINEERING
ISSN	0925-8574
EISSN	1872-6992
出版年	2019
卷号	127 页码:348-355
英文摘要	Soil carbon is an essential part of the terrestrial carbon pool, which includes soil organic carbon (SOC) and soil inorganic carbon (SIC). Soils contain a huge amount of inorganic carbon in arid and semiarid regions, which may be a potential source of CO2 emitted to the atmosphere. Neglecting soil inorganic carbon could result in erroneous or misleading interpretations of the soil carbon pool of arid and semiarid ecosystems. Nevertheless, only a few studies have focused on variations of SIC, or have further used the soil stable carbon isotope to explore the inherent mechanism of SIC variations in semiarid regions. The study was designed to estimate the dynamic of SOC and SIC with the development of desertification in the topsoil. Here, four desertification stages were chosen, including potential desertification (PD), light desertification (LD), severe desertification (SD), and very severe desertification (VSD) stages, to evaluate the horizontal and vertical distributions of SOC and SIC, and the stable carbon isotope (delta C-13) of SOC and SIC with the desertification development in the topsoil (0-30 cm soil layer). The SOC and SIC contents and storage changed significantly with desertification development. The PD stages had the highest SOC (21.01 mg/hm(2)) and SIC (11.60 mg/hm(2)) storage at 0-30 cm, while the contrary result for VSD stages, with the average of SOC and SIC, was 8.27 mg/hm(2) and 6.15 mg/hm(2), respectively. The vertical distribution of SIC and SOC has varied sharply with soil depth. The delta C-13-SIC within the 0-30 cm soil profile in the PD stages were more negative than those in other desertification stages and gradually increased with desertification development. In contrast, the delta C-13-SOC generally decreased with desertification progress. The entire data (108 soil samples) exhibited that delta C-13-SIC were significantly and negatively correlated with delta C-13-SOC and SIC content, while SIC storage was significantly and positively correlated with SOC storage. The results demonstrated that an increase of SOC might be related to enhancing accumulation of SIC. The results of this study provide information about the variation of SIC and SOC with the desertification development and contribute to our understanding of the important role of SIC in estimating the carbon sequestration capacity in the degraded grassland ecosystems in arid and semiarid regions.
英文关键词	Stable carbon isotope Soil inorganic carbon Topsoil Carbon storage Desertification
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000455632500036
WOS关键词	NATURAL VEGETATION RESTORATION ; LOESS PLATEAU REGION ; STABLE CARBON ; PEDOGENIC CARBONATES ; CLIMATE-CHANGE ; LAND USES ; STORAGE ; NITROGEN ; PATTERN ; CHRONOSEQUENCE
WOS类目	Ecology ; Engineering, Environmental ; Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology ; Engineering
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/2XILL650/215168
作者单位	1.Ningxia Univ, Breeding Base State Key Lab Land Degradat & Ecol, Yinchuan 750021, Ningxia, Peoples R China; 2.Ningxia Univ, Sch Agr, Yinchuan 750021, Peoples R China; 3.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	An, Hui,Li, Qiao-Ling,Yan, Xin,et al. Desertification control on soil inorganic and organic carbon accumulation in the topsoil of desert grassland in Ningxia, northwest China[J]. 西北农林科技大学,2019,127:348-355.
APA	An, Hui,Li, Qiao-Ling,Yan, Xin,Wu, Xiu-Zhi,Liu, Ren-tao,&Fang, Yan.(2019).Desertification control on soil inorganic and organic carbon accumulation in the topsoil of desert grassland in Ningxia, northwest China.ECOLOGICAL ENGINEERING,127,348-355.
MLA	An, Hui,et al."Desertification control on soil inorganic and organic carbon accumulation in the topsoil of desert grassland in Ningxia, northwest China".ECOLOGICAL ENGINEERING 127(2019):348-355.