干旱区生态环境知识资源中心(Arid): Effects of Moisture on Soil CO2 Efflux in a Cotton Field in Northwestern China

Arid

DOI	10.1134/S1064229323603542
	Effects of Moisture on Soil CO2 Efflux in a Cotton Field in Northwestern China
	Zhao, Zhimin; Shi, Fengxia
通讯作者	Zhao, ZM
来源期刊	EURASIAN SOIL SCIENCE
ISSN	1064-2293
EISSN	1556-195X
出版年	2024
卷号	57 期号:6 页码:945-953
英文摘要	In order to explore the effect of moisture on soil CO2 effluxes in a Cotton field in Northwestern China, soil profile CO2 concentration, soil profile temperature and moisture at depths 5, 10 and 15 cm were measured simultaneously. Based on the models of Fick first law of diffusion, Moldrup model, gas transport equation, van't Hoffequation, exponential equation and quadratic function equation, the effects of soil moisture and temperature on soil CO2 efflux (F-(0)) was determined. The results were as following: (1) F-(0) has an optimal soil moisture, and the optimal moisture of F-(0) is close to the field capacity (FC). In this study, the field capacity (FC) was close to 0.278 m(3)/m(3). When the values of soil moisture were higher than the optimal soil moisture values of F-(0), soil moisture is the main limiting factor for F-(0), and F-(0) is negatively correlated with soil moisture at soil moisture value >0.278 m(3)/m(3) (FC). However, the values of F-(0) increased with the increase of soil moisture when the values of soil moisture were lower than the optimal soil moisture values of F-(0). (2) Soil moisture affected the temperature responses of F-(0) by a clear threshold inflection point, which significantly influence the temperature sensitivity of F-(0). We concluded that the scale of changes in soil moisture is significant to F-(0). These factors should be incorporated into models to improve the prediction of carbon-climate feedbacks.
英文关键词	arid land irrigation carbon cycle greenhouse gas emissions
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001200523000002
WOS关键词	CARBON-DIOXIDE FLUX ; HETEROTROPHIC RESPIRATION ; TEMPERATURE SENSITIVITY ; WATER CONTENT ; FOREST ; SEQUESTRATION ; COMPONENTS ; VEGETATION ; DIFFUSION ; RESPONSES
WOS类目	Soil Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403683
推荐引用方式 GB/T 7714	Zhao, Zhimin,Shi, Fengxia. Effects of Moisture on Soil CO2 Efflux in a Cotton Field in Northwestern China[J],2024,57(6):945-953.
APA	Zhao, Zhimin,&Shi, Fengxia.(2024).Effects of Moisture on Soil CO2 Efflux in a Cotton Field in Northwestern China.EURASIAN SOIL SCIENCE,57(6),945-953.
MLA	Zhao, Zhimin,et al."Effects of Moisture on Soil CO2 Efflux in a Cotton Field in Northwestern China".EURASIAN SOIL SCIENCE 57.6(2024):945-953.