干旱区生态环境知识资源中心(Arid): The effect of different temperature and pH levels on uptake of CO2 in Solonchaks

Arid

DOI	10.1016/j.geoderma.2019.04.012
	The effect of different temperature and pH levels on uptake of CO2 in Solonchaks
	Zhao, Xiaoning 1; Conrads, Hannah 2; Zhao, Chengyi1 ; Ingwersen, Joachim 2; Stahr, Karl 2; Wei, Xiaorong 3
通讯作者	Zhao, Chengyi
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2019
卷号	348 页码:60-67
英文摘要	Previous studies have observed a negative CO2 efflux from semi-desert and desert soil, but the carbon uptake in alkaline soils has not been measured quantitatively in laboratory. The present study aims at closing this gap considering the effect of temperature, soil pH and pCO(2). CO2 uptake was studied with the help of the Barometric Process Separation (BaPS) technique. CO2 uptake was studied at 3 different temperatures viz. 15, 20 and 25 degrees C. CO2 uptake was observed after CO2 injection with pH values ranging from 8 to 10 in desert Solonchak soils. We found that CO2 uptake depended on pCO(2) and temperature. CO2 uptake occurred rapidly within the first 10 min after the CO2 injection and gradually slowed down afterwards. Results showed that 72%-97% of injected CO2 was taken up by soils (pH 8-10). CO2 uptake increased as soil pH increased and its uptake reached equilibrium faster in soil with a lower pH level (pH < 9) than in soil with a higher pH level (pH >= 9). Dissolved CO2 (CO2eq) (mu mol ml(-1)) increased with increasing CO2 partial pressure (pCO(2)) with equation y = a (1-b(x)) (r(2) > 0.96) and pH. The lower temperature produced a higher CO2aq for the same pCO(2) value. In conclusion, desert soils can rapidly uptake of CO2, and the main controlling process of CO2 uptake in the desert soils was decided by soil pH and temperature. The CO2 uptake by the soil solution may be an important pathway for C sequestration in semi-desert and desert regions.
英文关键词	CO2 uptake Desert soil pH pCO(2) CO2aq
类型	Article
语种	英语
国家	Peoples R China ; Germany
收录类别	SCI-E
WOS记录号	WOS:000470042500007
WOS关键词	BAROMETRIC PROCESS SEPARATION ; CARBON-DIOXIDE ; SOIL CARBON ; MOJAVE-DESERT ; EFFLUX ; FLUX
WOS类目	Soil Science
WOS研究方向	Agriculture
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/2XILL650/215936
作者单位	1.Nanjing Univ Informat Sci & Technol, Land Sci Res Ctr, Nanjing, Jiangsu, Peoples R China; 2.Univ Hohenheim, Inst Soil Sci & Land Evaluat, Stuttgart, Germany; 3.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Xiaoning,Conrads, Hannah,Zhao, Chengyi,et al. The effect of different temperature and pH levels on uptake of CO2 in Solonchaks[J]. 西北农林科技大学, 南京信息工程大学,2019,348:60-67.
APA	Zhao, Xiaoning,Conrads, Hannah,Zhao, Chengyi,Ingwersen, Joachim,Stahr, Karl,&Wei, Xiaorong.(2019).The effect of different temperature and pH levels on uptake of CO2 in Solonchaks.GEODERMA,348,60-67.
MLA	Zhao, Xiaoning,et al."The effect of different temperature and pH levels on uptake of CO2 in Solonchaks".GEODERMA 348(2019):60-67.