干旱区生态环境知识资源中心(Arid): One third of the abiotically-absorbed atmospheric CO2 by the loess soil is conserved in the solid phase

Arid

DOI	10.1016/j.geoderma.2020.114448
	One third of the abiotically-absorbed atmospheric CO2 by the loess soil is conserved in the solid phase
	Gao, Yang; Zhang, Ping; Liu, Jiabin
通讯作者	Liu, JB
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2020
卷号	374
英文摘要	It has frequently been noticed that alkaline soils in arid and semiarid areas can absorb atmospheric CO2 abiotically. However, the fate of the absorbed CO2 is largely unknown, limiting our ability to accurately assess the contribution of abiotic CO2 absorption to carbon sequestration. The hypothesis that some abiotically-absorbed carbon could be fixed in the soil solid phase is yet to be explicitly tested. From April to November 2016, we added (CO2)-C-13 to the natural alkaline loess soil at a depth of 0-17 cm and quantified the proportion of (CO2)-C-13 conserved in the soil solid phase on the central Loess Plateau of China. The results showed that natural surface soil absorbed (CO2)-C-13 at a rate of 475.9 mg m(-2) d(-1). Of the absorbed (CO2)-C-13, 33.2% was conserved in the soil solid phase. The rate of added (CO2)-C-13 conserved in the solid phase was positively correlated with mean monthly soil water content but negatively correlated with mean monthly soil temperature. Our results indicated that, loess soil can absorb CO2 from the atmosphere through abiotic processes, and part of the abiotically-absorbed CO2 is stably fixed in the soil solid phase. Soil with a higher water content and lower temperature may promote the abiotic CO2 fixation. The rate of CO2 fixation through abiotic processes at the surface soil accounted for approximately 10%-20% of the reported local annual net ecosystem exchange, implying that the abiotic CO2 uptake by loess soil may play an important role in assessing the capacity of CO2 sequestration in these areas.
英文关键词	Loess soil Abiotic CO2 absorption Carbon isotope Soil solid phase
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000540257900017
WOS关键词	INORGANIC CARBON ; NET ECOSYSTEM ; DESERT ; EXCHANGE ; FLUX ; SEQUESTRATION ; HIDDEN ; TEMPERATURE ; ABSORPTION ; SINK
WOS类目	Soil Science
WOS研究方向	Agriculture
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/2XILL650/324748
作者单位	[Gao, Yang] Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China; [Gao, Yang; Zhang, Ping; Liu, Jiabin] Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Gao, Yang,Zhang, Ping,Liu, Jiabin. One third of the abiotically-absorbed atmospheric CO2 by the loess soil is conserved in the solid phase[J]. 西北农林科技大学,2020,374.
APA	Gao, Yang,Zhang, Ping,&Liu, Jiabin.(2020).One third of the abiotically-absorbed atmospheric CO2 by the loess soil is conserved in the solid phase.GEODERMA,374.
MLA	Gao, Yang,et al."One third of the abiotically-absorbed atmospheric CO2 by the loess soil is conserved in the solid phase".GEODERMA 374(2020).