干旱区生态环境知识资源中心(Arid): Sediment deposition changes the relationship between soil organic and inorganic carbon: Evidence from the Chinese Loess Plateau

Arid

DOI	10.1016/j.agee.2020.107076
	Sediment deposition changes the relationship between soil organic and inorganic carbon: Evidence from the Chinese Loess Plateau
	Tong, L. S.; Fang, N. F.; Xiao, H. B.; Shi, Z. H.
通讯作者	Xiao, HB ; Shi, ZH
来源期刊	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
ISSN	0167-8809
EISSN	1873-2305
出版年	2020
卷号	302
英文摘要	Soil erosion has a significant impact on the distribution and sequestration of soil carbon, affecting the global C cycle. Although the transport and transformation of soil organic carbon (SOC) during the erosion process have been widely studied, there is still a lack of understanding of the impacts of soil erosion on soil inorganic carbon (SIC) and its relationships with SOC. In this study, 62 erosional sites (including 16 gullies, 17 grasslands, 16 forestlands and 13 croplands) and 35 depositional sites (check dams) on the Chinese Loess Plateau were selected. Partial least squares regression (PLSR) was carried out to explore the main influential factors of SIC variation. The results showed that, compared with erosional sites, the mean SOC and SIC content in depositional sites (0-25 cm) increased by 24.4 % and 15.4 %, respectively. Both SOC and SIC contents in depositional sites exhibited a decreasing tendency with depth. SIC was significantly negatively correlated with SOC (R-2 = 0.25, P < 0.01) across all erosional sites (0-25 cm). In contrast, SIC was significantly positively correlated with SOC in all depositional layers beneath 100 cm (P < 0.05), and R-2 increased from 0.23 (100-200 cm) to 0.68 (300-400 cm) and then decreased to 0.46 (500-600 cm). Sediment transport and deposition converted the negative relationship between SOC and SIC in the erosional sites to a positive relationship in deep depositional soil. The PLSR analysis suggested that SOC had an important (VIP > 1) positive impact on predicting SIC in depositional sites, which indicated that SOC increase contributed to enhancing SIC accumulation under the depositional conditions in the semi-arid region. We believe that the influencing mechanism of soil erosion on the relationship between SOC and SIC revealed in this study will contribute to understanding the soil C cycle.
英文关键词	Soil erosion Sediment deposition Soil organic carbon Soil inorganic carbon Check dam
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000564558000013
WOS关键词	LEAST-SQUARES REGRESSION ; WATER EROSION ; CHECK-DAM ; SEQUESTRATION ; CATCHMENT ; DIOXIDE ; STORAGE ; RESTORATION ; NORTHWEST ; PATTERNS
WOS类目	Agriculture, Multidisciplinary ; Ecology ; Environmental Sciences
WOS研究方向	Agriculture ; Environmental Sciences & Ecology
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/2XILL650/325923
作者单位	[Tong, L. S.; Xiao, H. B.; Shi, Z. H.] Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Peoples R China; [Fang, N. F.; Shi, Z. H.] Chinese Acad Sci, State Key Lab Soil Eros & Dryland Farming Loess P, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China; [Fang, N. F.; Shi, Z. H.] MWR, Yangling 712100, Shaanxi, Peoples R China; [Fang, N. F.; Shi, Z. H.] CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
推荐引用方式 GB/T 7714	Tong, L. S.,Fang, N. F.,Xiao, H. B.,et al. Sediment deposition changes the relationship between soil organic and inorganic carbon: Evidence from the Chinese Loess Plateau[J]. 西北农林科技大学,2020,302.
APA	Tong, L. S.,Fang, N. F.,Xiao, H. B.,&Shi, Z. H..(2020).Sediment deposition changes the relationship between soil organic and inorganic carbon: Evidence from the Chinese Loess Plateau.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,302.
MLA	Tong, L. S.,et al."Sediment deposition changes the relationship between soil organic and inorganic carbon: Evidence from the Chinese Loess Plateau".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 302(2020).