干旱区生态环境知识资源中心(Arid): Climate and management impacts on the spatiotemporal dynamics of water-carbon fluxes in the North China Plain

Arid

DOI	10.1016/j.agee.2022.108270
	Climate and management impacts on the spatiotemporal dynamics of water-carbon fluxes in the North China Plain
	Wang, Xingwang; Lei, Huimin; Li, Jiadi; Qu, Yanping; Kong, Dongdong; Huo, Zailin
通讯作者	Lei, HM
来源期刊	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
ISSN	0167-8809
EISSN	1873-2305
出版年	2023
卷号	343
英文摘要	Evapotranspiration (ET) and gross primary production (GPP) over agroecosystems could be noticeably altered by climate change and human activities. A better understanding of the impacts on water-carbon interactions and the underlying mechanisms, are crucial to improve water use efficiency (WUE). Comparing to 23 site-years of observations, regional ET dataset and statistical yields, the Remote Sensing-based cropland Ecohydrological Model (ReSEM) was validated to estimate the spatiotemporal dynamics of ET, GPP and WUE for dryland agro-ecosystems in the North China Plain (NCP) from 2001 to 2018. Spatially, the distributions of mean annual ET, GPP and WUE were comparable which changed obviously in different climatic conditions while varied slightly between various irrigation areas. The significantly increased WUE occurred in 38.6 % cropland, mainly located in the humid south regions with less irrigation requirement and the central sub-humid areas along the Yellow River with access to surface irrigation. The averaged increasing trend of WUE in the heavily irrigated semi-arid areas was relatively low. The temporal dynamic of regional mean WUE indicated a significantly increased rate of 0.026 gC kg(-1)H(2)O per year during 2001-2018. The spatiotemporal trends of WUE were mainly resulted from the significantly increased GPP rather than ET. The experimental simulations demonstrated that agricultural management dominated the interannual trend of WUE, whose relative contribution (79.5 %) was obviously larger than that of air CO2 concentration (40.2 %) and climate variable change ( 19.7 %). Besides, the effects of agricultural management on WUE were further divided based on the classified six cropping systems, 82.4 % of which was attributed to the management of winter wheat-summer maize rotation system. This study sheds light on the improvement of WUE for dryland agroecosystem under changing environments and highlights the dominant impact of agricultural management.Evapotranspiration (ET) and gross primary production (GPP) over agroecosystems could be noticeably altered by climate change and human activities. A better understanding of the impacts on water-carbon interactions and the underlying mechanisms, are crucial to improve water use efficiency (WUE). Comparing to 23 site-years of observations, regional ET dataset and statistical yields, the Remote Sensing-based cropland Ecohydrological Model (ReSEM) was validated to estimate the spatiotemporal dynamics of ET, GPP and WUE for dryland agro-ecosystems in the North China Plain (NCP) from 2001 to 2018. Spatially, the distributions of mean annual ET, GPP and WUE were comparable which changed obviously in different climatic conditions while varied slightly between various irrigation areas. The significantly increased WUE occurred in 38.6 % cropland, mainly located in the humid south regions with less irrigation requirement and the central sub-humid areas along the Yellow River with access to surface irrigation. The averaged increasing trend of WUE in the heavily irrigated semi-arid areas was relatively low. The temporal dynamic of regional mean WUE indicated a significantly increased rate of 0.026 gC kg(-1)H(2)O per year during 2001-2018. The spatiotemporal trends of WUE were mainly resulted from the significantly increased GPP rather than ET. The experimental simulations demonstrated that agricultural management dominated the interannual trend of WUE, whose relative contribution (79. 5 %) was obviously larger than that of air CO2 concentration (40.2 %) and climate variable change ( 19.7 %). Besides, the effects of agricultural management on WUE were further divided based on the classified six cropping systems, 82.4 % of which was attributed to the management of winter wheat-summer maize rotation system. This study sheds light on the improvement of WUE for dryland agroecosystem under changing environments and highlights the dominant impact of agricultural management.
英文关键词	Evapotranspiration Gross primary production Water use efficiency Land management Winter wheat and summer maize
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001127314600004
WOS关键词	GREEN-UP DATE ; USE EFFICIENCY ; WINTER-WHEAT ; CROP PRODUCTION ; EVAPOTRANSPIRATION ; PRODUCTIVITY ; TRENDS ; MODEL ; LAND ; GROUNDWATER
WOS类目	Agriculture, Multidisciplinary ; Ecology ; Environmental Sciences
WOS研究方向	Agriculture ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395111
推荐引用方式 GB/T 7714	Wang, Xingwang,Lei, Huimin,Li, Jiadi,et al. Climate and management impacts on the spatiotemporal dynamics of water-carbon fluxes in the North China Plain[J],2023,343.
APA	Wang, Xingwang,Lei, Huimin,Li, Jiadi,Qu, Yanping,Kong, Dongdong,&Huo, Zailin.(2023).Climate and management impacts on the spatiotemporal dynamics of water-carbon fluxes in the North China Plain.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,343.
MLA	Wang, Xingwang,et al."Climate and management impacts on the spatiotemporal dynamics of water-carbon fluxes in the North China Plain".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 343(2023).