干旱区生态环境知识资源中心(Arid): The response of agroecosystem water use efficiency to cropland change in northwest China?s Hexi Corridor

Arid

DOI	10.1016/j.agwat.2022.108062
	The response of agroecosystem water use efficiency to cropland change in northwest China?s Hexi Corridor
	Yang, Linshan; Feng, Qi; Lu, Tiaoxue; Adamowski, Jan F.; Yin, Zhenliang; Hatami, Shadi; Zhu, Meng; Wen, Xiaohu
通讯作者	Yang, LS ; Yin, ZL
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2023
卷号	276
英文摘要	China's rapid population growth has inevitably led to a need for cropland expansion to meet food security challenges. In arid regions such an expansion is restricted by limited water resources, and an increase in pro-ductivity per cropland area must be achieved while still limiting water use. However, the response of agro-ecosystem Water Use Efficiency (WUEa.e.) to alterations in cropland use in Northwest China's Hexi Corridor has not been documented in any great detail. This has limited our understanding of the region's water-carbon in-teractions and, in particular, how effective cropland management and efficient water utilization protocols might be applied there. The response of the region's WUEa.e. to different potential shifts in cropland was evaluated by drawing on growing season (2003-2020), Gross Primary Productivity (GPP) and actual evapotranspiration (ETc act) data. Over this period net cropland area increased, with 12.3 % of total cropland transferred in, but only 2.5 % of cropland transferred out. The trend in growing season WUEa.e. was greatest in cropland regions transferred in (p < 0.05), and lowest in the cropland transferred out, indicating irrigation and field management in cropland could ensure that WUEa.e. could be maintained at a higher level. Among the different cropland transformation types, the impact of cropland change on WUEa.e. was essentially determined by shifting corre-lations between GPP and ETc act. This correlation was weakened when the water supply increased, heightening the negative impact of ETc act on WUEa.e., while weakening the positive impact of GPP on WUEa.e.. There was a tradeoff point for the level of irrigation between improving WUEa.e. and crop yield. Suitable water-saving irri-gation is crucial to maintaining a relatively high level of WUEa.e., yet not decreasing crop yield. Water-saving irrigation in the Shiyang River basin was deemed to have limited potential, whereas in the Shule River and Heihe River basins there remains some potential for such irrigation. The present study's results can potentially inform agricultural water and land management in the region, and provide the basis for efficient water resources utilization.
英文关键词	Cropland change Agroecosystem Water Use Efficiency Gross Primary Productivity Actual Evapotranspiration Hexi Corridor
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000899210700002
WOS关键词	CLIMATE-CHANGE ; TERRESTRIAL ECOSYSTEMS ; HEIHE RIVER ; EVAPOTRANSPIRATION ; VARIABILITY ; DATASETS ; PLATEAU ; DRIVERS ; MODEL
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395026
推荐引用方式 GB/T 7714	Yang, Linshan,Feng, Qi,Lu, Tiaoxue,et al. The response of agroecosystem water use efficiency to cropland change in northwest China?s Hexi Corridor[J],2023,276.
APA	Yang, Linshan.,Feng, Qi.,Lu, Tiaoxue.,Adamowski, Jan F..,Yin, Zhenliang.,...&Wen, Xiaohu.(2023).The response of agroecosystem water use efficiency to cropland change in northwest China?s Hexi Corridor.AGRICULTURAL WATER MANAGEMENT,276.
MLA	Yang, Linshan,et al."The response of agroecosystem water use efficiency to cropland change in northwest China?s Hexi Corridor".AGRICULTURAL WATER MANAGEMENT 276(2023).