干旱区生态环境知识资源中心(Arid): Cultivation of non-irrigated spring wheat in temperate free-grazing steppe improved both ecosystem and canopy water use efficiency

Arid

DOI	10.1016/j.scitotenv.2021.149948
	Cultivation of non-irrigated spring wheat in temperate free-grazing steppe improved both ecosystem and canopy water use efficiency
	Li, Yuzhe; Zhang, Xinyuan; Hu, Zhongmin; Shao, Quanqin; Fan, Jiangwen; Chen, Zhi
通讯作者	Li, YZ ; Shao, QQ (corresponding author), Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China.
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2022
卷号	803
英文摘要	The temperate steppe in northern China is important for sandstorm control and food/livestock production. Understanding the influence and regulatory control of cultivation on the water balance and water use efficiency (WUE) of this water-limited region would promote the sustainability of local ecosystem and food supply. This study combined eddy covariance system observational data and the Shuttleworth-Wallace model to investigate evapotranspiration (ET) and its composition in paired sites, including a free-grazing steppe site and an adjacent site reclaimed for spring wheat cultivation in Xilinhot, Inner Mongolia. Further, analysis of the WUE of both the ecosystem (WUEE) and the canopy (WUEC) under the two sites showed that the mean daily gross primary productivity (GPP) of the cultivation site was 3.84 gC.m(-2).d(-1), i.e., 15.7% higher than that of the free-grazing site (3.32 gC.m(-2).d(-1)). Compared with the free-grazing site (1.76 kgH(2)O.m(-2).d(-1)), the mean daily ET of the cultivation site (1.40 kgH(2)O.m(-2).d(-1)) was reduced by 20.7%. The difference in ET was due mainly to suppression of evaporation at the cultivation site from increased shading associated with a higher leaf area index (LAI). The largely increased GPP of the cultivation site fundamentally contributed to the 54.7% higher WUEC (4.75 gC.kg(-1)H(2)O) in comparison with the free-grazing site (3.08 gC.kg(-1)H(2)O). The WUEE of the cultivation site was 57.9% higher than that of the free-grazing site. The variation of transpiration of the free-grazing site explained 64% of the change of WUEC. These results indicate that land use differences in the temperate steppe area changed vegetation productivity substantially. Moreover, ecosystem ET and its composition, as well as large-scale land use change, might influence the regional water use pattern and mass balance. Our findings help clarify the impact of typical land use change on regional WUE, and could promote development of visionary and effective strategies for the use of the limited resources in arid-semiarid regions. (C) 2021 Elsevier B.V. All rights reserved.
英文关键词	Temperate steppe Water use efficiency Steppe land use Grassland cultivation Free grazing
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000709082400003
WOS关键词	WINTER-WHEAT ; EDDY COVARIANCE ; RIVER-BASIN ; EVAPOTRANSPIRATION ; PATTERNS ; ENERGY ; CROP
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/2XILL650/374485
作者单位	[Li, Yuzhe; Zhang, Xinyuan; Shao, Quanqin; Fan, Jiangwen] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China; [Zhang, Xinyuan] China Univ Geosci, Beijing 100083, Peoples R China; [Hu, Zhongmin] South China Normal Univ, Sch Geog, Shipai Campus, Guangzhou 510631, Peoples R China; [Chen, Zhi] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Synth Res Ctr,Network Observat & Modeling, Chinese Ecosyst Res Network,Key Lab Ecosyst, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Li, Yuzhe,Zhang, Xinyuan,Hu, Zhongmin,et al. Cultivation of non-irrigated spring wheat in temperate free-grazing steppe improved both ecosystem and canopy water use efficiency[J],2022,803.
APA	Li, Yuzhe,Zhang, Xinyuan,Hu, Zhongmin,Shao, Quanqin,Fan, Jiangwen,&Chen, Zhi.(2022).Cultivation of non-irrigated spring wheat in temperate free-grazing steppe improved both ecosystem and canopy water use efficiency.SCIENCE OF THE TOTAL ENVIRONMENT,803.
MLA	Li, Yuzhe,et al."Cultivation of non-irrigated spring wheat in temperate free-grazing steppe improved both ecosystem and canopy water use efficiency".SCIENCE OF THE TOTAL ENVIRONMENT 803(2022).