干旱区生态环境知识资源中心(Arid): Variations and controlling factors of carbon dioxide and methane fluxes in a meadow-rice ecosystem in a semi-arid region

Arid

DOI	10.1016/j.catena.2022.106317
	Variations and controlling factors of carbon dioxide and methane fluxes in a meadow-rice ecosystem in a semi-arid region
	Bao, Yongzhi; Liu, Tingxi; Duan, Limin; Tong, Xin; Zhang, Yongqiang; Wang, Guoqiang; Singh, V. P.
通讯作者	Liu, TX
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2022
卷号	215
英文摘要	Although previous studies have illustrated the variations in carbon dioxide (CO2) and methane (CH4) fluxes for different types of wetlands, there have been few reports on those of meadow-rice mixed ecosystems in semi-arid regions. In this study, eddy covariance (EC) technique was utilized to measure CO2 and CH4 fluxes for a meadow rice mixed ecosystem during the growing season in 2020 in the Horqin Sandy Land, North China. The results indicated obvious diurnal and seasonal variations in gross primary productivity (GPP), ecosystem respiration (R-eco), net CO2 exchange (NEE), and CH4 flux, with high levels during the vigorous growing stage and low levels during the early and late growing stages. The mean daily GPP, Reco , NEE, and CH4 were 11.33 g CO2 m(-2) d-1 , 6.37 g CO2 m(-2) d-1 ,-4.96 g CO2 m(-2) d-1 , and 81.97 mg CH4 m- 2 d-1 , respectively. The accumulated values of GPP, Reco , NEE, and CH4 during the growing season were 1,756.54 g CO2 m- 2 (478.62 g C m(-2)), 987.30 g CO2 m(-2) (269.02 g C m(-2)),-769.24 g CO2 m(-2) (-209.60 g C m(-2)), and 12.7 g CH4 m- 2 (9.55 g C m(-2)), respectively, showing that the meadow-rice mixed ecosystem acted as CO2 sink and CH4 source. Low intensity CH4 emissions were maintained during the dry period and were controlled by soil moisture (SM). The seasonal dynamics of GPP, R-eco , and CH4 throughout the growing season were mainly controlled by soil temperature (T-s) and air temperature (T-a).
英文关键词	Greenhouse gases Meadow-rice mixed ecosystem Eddy covariance Carbon dioxide flux Methane flux
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000798079700003
WOS关键词	GROSS PRIMARY PRODUCTIVITY ; EDDY COVARIANCE ; TERRESTRIAL ECOSYSTEMS ; SEASONAL-VARIATION ; TEMPORAL VARIATION ; NORTHERN CHINA ; CO2 EXCHANGE ; TEMPERATE ; GRASSLAND ; RESPIRATION
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392101
推荐引用方式 GB/T 7714	Bao, Yongzhi,Liu, Tingxi,Duan, Limin,et al. Variations and controlling factors of carbon dioxide and methane fluxes in a meadow-rice ecosystem in a semi-arid region[J],2022,215.
APA	Bao, Yongzhi.,Liu, Tingxi.,Duan, Limin.,Tong, Xin.,Zhang, Yongqiang.,...&Singh, V. P..(2022).Variations and controlling factors of carbon dioxide and methane fluxes in a meadow-rice ecosystem in a semi-arid region.CATENA,215.
MLA	Bao, Yongzhi,et al."Variations and controlling factors of carbon dioxide and methane fluxes in a meadow-rice ecosystem in a semi-arid region".CATENA 215(2022).