干旱区生态环境知识资源中心(Arid): Assessing irrigated water utilization to optimize irrigation schedule in the oasis-desert ecotone of Hexi Corridor of China

Arid

DOI	10.1016/j.agee.2021.107647
	Assessing irrigated water utilization to optimize irrigation schedule in the oasis-desert ecotone of Hexi Corridor of China
	Li, Danfeng; Wang, Xunming
通讯作者	Li, DF (corresponding author), Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China.
来源期刊	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
ISSN	0167-8809
EISSN	1873-2305
出版年	2021
卷号	322
英文摘要	Water is the key factor limiting crop production in arid inland river basins of northwestern China, where water scarcity challenges food security and the sustainability of eco-environment. Changing the chronical management strategies is urgent to realize more crop per drop and to satisfy ecological water requirement in the Hexi Corridor, where agriculture relied heavily on irrigation using groundwater. Long-term observations of soil water balance components and crop production are lack but essential to optimize irrigation schedules with moderate groundwater recharge. AquaCrop model was calibrated and validated using field data on spring wheat and spring maize rotation in the midstream of the Heihe River from 2005 to 2014, and used to assess current irrigation practices and to generate optimal deficit irrigation schedules. Simulations of soil water balance, canopy progression, biomass accumulation and yield production over time well mimicked the water utilization and crop development. Plastic mulching prevented 53.5% and 62.6% of potential soil evaporation for spring wheat and spring maize, respectively. Temporary water logging soon after irrigation reduced transpiration by restricting canopy development and stomatal conductance. No more than 30% of water supply was used by crops, but drainage below mot zone occupied more than 68% of water supply by present. Mean biomass water use efficiency (WUE) was 0.034 kg m(-3) and 0.047 kg m(-3), and mean yield WUE was 1.16 kg m(-3) and 2.41 kg m(-3) for spring wheat and spring maize, respectively. Cultivar 2014 for spring wheat and cultivar 8703 for spring maize were suitable for yield production in this area. Beyond 50% of applied water would be productively used with reduction of drainage in water supply by more than 25% under the modified irrigation schedules. Total amount of applied water reduced by about 50%, but the biomass and yield values would remain unchanged. These irrigation schedules will greatly improve WUE of irrigated agriculture, supporting the rational allocation of water resources of the inland river basins at a watershed scale.
英文关键词	Water saving irrigation Water exchange Water productivity Agricultural management Oasis-desert ecotone
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000707000600002
WOS关键词	SIMULATE YIELD RESPONSE ; FAO AQUACROP MODEL ; GROUNDWATER RECHARGE ; CROP MODEL ; GAS-EXCHANGE ; SOIL ; MAIZE ; WHEAT ; STRATEGIES ; MANAGEMENT
WOS类目	Agriculture, Multidisciplinary ; Ecology ; Environmental Sciences
WOS研究方向	Agriculture ; Environmental Sciences & Ecology
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362392
作者单位	[Li, Danfeng; Wang, Xunming] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China; [Wang, Xunming] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li, Danfeng,Wang, Xunming. Assessing irrigated water utilization to optimize irrigation schedule in the oasis-desert ecotone of Hexi Corridor of China[J]. 中国科学院地理科学与资源研究所,2021,322.
APA	Li, Danfeng,&Wang, Xunming.(2021).Assessing irrigated water utilization to optimize irrigation schedule in the oasis-desert ecotone of Hexi Corridor of China.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,322.
MLA	Li, Danfeng,et al."Assessing irrigated water utilization to optimize irrigation schedule in the oasis-desert ecotone of Hexi Corridor of China".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 322(2021).