干旱区生态环境知识资源中心(Arid): The effect of microorganisms on soil carbonate recrystallization and abiotic CO2 uptake of soil

Arid

DOI	10.1016/j.catena.2020.104592
	The effect of microorganisms on soil carbonate recrystallization and abiotic CO2 uptake of soil
	Zhao, Xiaoning; Zhao, Chengyi; Stahr, Karl; Kuzyakov, Yakov; Wei, Xiaorong
通讯作者	Zhao, CY
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2020
卷号	192
英文摘要	Desert ecosystems with a high soil pH are considered as a sink for atmospheric CO2. Although high CO2-uptakevia chemical processes is the major CO2-uptake process in saline and alkaline soil, microorganisms may affect the exchange of inorganic carbon between the soil solution and the solid phase. Some studies related to microbial processes on carbonate formation have been published, but seldom focus on saline and alkaline soils. To determine the microbial effects on the inorganic C flux and CaCO3 recrystallization, sterile and non-sterile Solonchak samples were incubated in a (CO2)-C-14-labelled atmosphere at two CO2 concentrations (0.2% and 2%). The C-14 activity was measured in the soil solution, air, and in CaCO3 after 2, 7, 21, 92 and 197 days. The C-14 in dissolved organic carbon in the sterile and non-sterile soils was below 5% of the C-14 input C-14 trapping in CaCO3 increased with the decrease of the C-14 remaining in the gaseous CO2. Carbonate recrystallization increased logarithmically with time (R-2 > 0.96). A two percent initial CO2 concentration lead to higher CaCO3 recrystallization (5-50 x 10(-3)% of initial CaCO3) compared to a 0.2% initial CO2 concentration (0.8-7 x 10(-3)% of initial CaCO3) from 2 to 197 days. CaCO3 recrystallization (% of initial CaCO3) in the sterile Solonchak was higher by 10% to 190% than the non-sterile Solonchak, indicating that the microorganisms decreased the C-14 trapping of CaCO3 by 4-23% from 2 to 197 days. We assume that microorganisms grew on the carbonate surface like a coating. This must have retarded the carbonate recrystallization. We concluded that the soil CO2 concentration is the most important factor for CaCO3 recrystallization. The presence of microorganisms strongly decreased the CaCO3 recrystallization. CaCO3 recrystallization process including CO2 in soil water could be the abiotic CO2 uptake from the atmosphere by saline and alkaline soil.
英文关键词	(CO2)-C-14 Microorganisms Carbonate recrystallization Solonchak Saline and alkaline soil
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000531598500008
WOS关键词	PEDOGENIC CARBONATES ; RE-CRYSTALLIZATION ; INORGANIC CARBON ; DIOXIDE ; SEQUESTRATION ; ASSIMILATION ; RESPIRATION ; INCUBATION ; CALICHE ; EFFLUX
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 ; 南京信息工程大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324431
作者单位	[Zhao, Xiaoning; Zhao, Chengyi] Nanjing Univ Informat Sci & Technol, Land Sci Res Ctr, Nanjing 210044, Peoples R China; [Stahr, Karl] Univ Hohenheim, Inst Soil Sci & Land Evaluat, D-70593 Stuttgart, Germany; [Kuzyakov, Yakov] Univ Gottingen, Dept Soil Sci Temperate Ecosyst, D-37077 Gottingen, Germany; [Kuzyakov, Yakov] Univ Gottingen, Dept Agr Soil Sci, D-37077 Gottingen, Germany; [Kuzyakov, Yakov] Kazan Fed Univ, Inst Environm Sci, Kazan 420008, Russia; [Wei, Xiaorong] 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	Zhao, Xiaoning,Zhao, Chengyi,Stahr, Karl,et al. The effect of microorganisms on soil carbonate recrystallization and abiotic CO2 uptake of soil[J]. 西北农林科技大学, 南京信息工程大学,2020,192.
APA	Zhao, Xiaoning,Zhao, Chengyi,Stahr, Karl,Kuzyakov, Yakov,&Wei, Xiaorong.(2020).The effect of microorganisms on soil carbonate recrystallization and abiotic CO2 uptake of soil.CATENA,192.
MLA	Zhao, Xiaoning,et al."The effect of microorganisms on soil carbonate recrystallization and abiotic CO2 uptake of soil".CATENA 192(2020).