干旱区生态环境知识资源中心(Arid): Variations in seasonal and inter-annual carbon fluxes in a semi-arid sandy maize cropland ecosystem in China's Horqin Sandy Land

Arid

DOI	10.1007/s11356-021-15751-z
	Variations in seasonal and inter-annual carbon fluxes in a semi-arid sandy maize cropland ecosystem in China's Horqin Sandy Land
	Niu, Yayi; Li, Yuqiang; Wang, Mingming; Wang, Xuyang; Chen, Yun; Duan, Yulong
通讯作者	Li, YQ (corresponding author), Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, 320 Donggang West Rd, Lanzhou 730000, Peoples R China. ; Li, YQ (corresponding author), Univ Chinese Acad Sci, Beijing 100049, Peoples R China. ; Li, YQ (corresponding author), Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Naiman Desertificat Res Stn, Tongliao 028300, Peoples R China.
来源期刊	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
ISSN	0944-1344
EISSN	1614-7499
出版年	2021-08
英文摘要	Sandy cropland ecosystems are major terrestrial ecosystems in semi-arid regions of northern China's Horqin Sandy Land, where they play an important role in the regional carbon balance. Continuous observation of the CO2 flux was conducted from 2014 to 2018 using the eddy covariance technique in a sandy maize cropland ecosystem in the Horqin Sandy Land. We analyzed carbon fluxes (the net ecosystem exchange (NEE) of CO2, ecosystem respiration (R-eco), and the gross primary productivity (GPP) and their responses to environmental factors at different temporal scales using Random Forest models and correlation analysis. We found that the sandy cropland was a carbon sink, with an annual mean NEE of -124.4 g C m(-2) yr(-1). However, after accounting for carbon exports and imports, the cropland became a net carbon source, with net biome production ranging from -501.1 to -266.7 g C m(-2) yr(-1). At a daily scale, the Random Forest algorithm revealed that photosynthetic photon flux density, soil temperature, and soil moisture were the main drivers for variation of GPP, R-eco, and NEE at different integration periods. At a monthly scale, GPP and R-eco increased with increasing leaf area index (LAI), so the maize ecosystem's carbon sequestration capacity increased with increasing LAI. At an annual scale, water availability (precipitation and irrigation) played a dominant role in explaining inter-annual variability of GPP and R-eco. Affected by climate (e.g., precipitation) and field management (e.g., cultivation, irrigation), carbon fluxes differed greatly between years in the maize system.
英文关键词	Net ecosystem exchange (NEE) Gross primary productivity (GPP) Ecosystem respiration (R-eco) Eddy covariance Horqin Sandy Land
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000687004900004
WOS关键词	SOIL ORGANIC-CARBON ; GROSS PRIMARY PRODUCTION ; NET PRIMARY PRODUCTION ; DIOXIDE EXCHANGE ; CO2 EXCHANGE ; PRECIPITATION PULSES ; GRASSLAND ECOSYSTEM ; NORTHEASTERN CHINA ; RESIDUE MANAGEMENT ; IRRIGATED MAIZE
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363171
作者单位	[Niu, Yayi; Li, Yuqiang; Wang, Mingming; Wang, Xuyang; Chen, Yun; Duan, Yulong] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, 320 Donggang West Rd, Lanzhou 730000, Peoples R China; [Niu, Yayi; Li, Yuqiang; Wang, Mingming; Wang, Xuyang; Chen, Yun; Duan, Yulong] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Niu, Yayi; Li, Yuqiang; Wang, Mingming; Wang, Xuyang; Chen, Yun; Duan, Yulong] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Naiman Desertificat Res Stn, Tongliao 028300, Peoples R China
推荐引用方式 GB/T 7714	Niu, Yayi,Li, Yuqiang,Wang, Mingming,et al. Variations in seasonal and inter-annual carbon fluxes in a semi-arid sandy maize cropland ecosystem in China's Horqin Sandy Land[J],2021.
APA	Niu, Yayi,Li, Yuqiang,Wang, Mingming,Wang, Xuyang,Chen, Yun,&Duan, Yulong.(2021).Variations in seasonal and inter-annual carbon fluxes in a semi-arid sandy maize cropland ecosystem in China's Horqin Sandy Land.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH.
MLA	Niu, Yayi,et al."Variations in seasonal and inter-annual carbon fluxes in a semi-arid sandy maize cropland ecosystem in China's Horqin Sandy Land".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2021).