干旱区生态环境知识资源中心(Arid): Seasonality of soil respiration under gypsum and straw amendments in an arid saline-alkali soil

Arid

DOI	10.1016/j.jenvman.2020.111494
	Seasonality of soil respiration under gypsum and straw amendments in an arid saline-alkali soil
	Wang, Xiujun; Wang, Junyi; Wang, Jiaping
通讯作者	Wang, JY
来源期刊	JOURNAL OF ENVIRONMENTAL MANAGEMENT
ISSN	0301-4797
EISSN	1095-8630
出版年	2021
卷号	277
英文摘要	Soil respiration (or CO2 production) is often determined by measuring CO2 efflux; however, there are differences between them in saline-alkali soils of arid land. The purpose of this study is to test a hypothesis that CO2 production exceeds efflux in arid saline-alkali soils under organic and gypsum amendments. We conducted a modeling study that was based on a two-year field experiment with four treatments: control, gypsum addition, wheat straw incorporation, and gypsum-straw combination. A diffusion model was forced by soil CO2, temperature and moisture that were continuously recorded at 0, 8 and 15 cm, and calibrated by measured CO2 efflux. We then applied the model to calculate CO2 production and efflux over 2014-2015, and found a strong and similar seasonality in both CO2 production and efflux under all treatments (i.e., highest in summer with one peak in 2014 and two peaks in 2015). Our results showed enhanced CO2 production and efflux over short period following rainfall. There were significantly exponential relationships between CO2 production/efflux and temperature. While straw incorporation significantly increased CO2 production and efflux, straw incorporation combined with gypsum amendment caused a decrease in CO2 production and efflux. CO2 production exceeded CO2 efflux mainly in the first half year, and annual difference was 33-130 g C m(2), with larger differences under gypsum amendment. Our study implies that a portion of respired CO2 is transformed into other forms and stored in saline-alkaline soils in arid land.
英文关键词	CO2 production CO2 efflux Salt-affected soil Gypsum amendment Straw incorporation Arid land
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000593975000010
WOS关键词	TEMPERATURE SENSITIVITY ; CO2 PRODUCTION ; WATER-CONTENT ; BIOLOGICAL-PROPERTIES ; INORGANIC CARBON ; GRADIENT-METHOD ; ORGANIC-CARBON ; LOESS PLATEAU ; EFFLUX ; FIELD
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/328038
作者单位	[Wang, Xiujun; Wang, Junyi] Beijing Normal Univ, Coll Global Change & Earth Syst Sci, Beijing 100875, Peoples R China; [Wang, Jiaping] Shihezi Univ, Coll Agr, Shihezi 832000, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xiujun,Wang, Junyi,Wang, Jiaping. Seasonality of soil respiration under gypsum and straw amendments in an arid saline-alkali soil[J]. 北京师范大学,2021,277.
APA	Wang, Xiujun,Wang, Junyi,&Wang, Jiaping.(2021).Seasonality of soil respiration under gypsum and straw amendments in an arid saline-alkali soil.JOURNAL OF ENVIRONMENTAL MANAGEMENT,277.
MLA	Wang, Xiujun,et al."Seasonality of soil respiration under gypsum and straw amendments in an arid saline-alkali soil".JOURNAL OF ENVIRONMENTAL MANAGEMENT 277(2021).