干旱区生态环境知识资源中心(Arid): Spatio-temporal changes and its driving forces of irrigation water requirements for cotton in Xinjiang, China

Arid

DOI	10.1016/j.agwat.2023.108218
	Spatio-temporal changes and its driving forces of irrigation water requirements for cotton in Xinjiang, China
	Geng, Qingling; Zhao, Yongkun; Sun, Shikun; He, Xiaohui; Wang, Dong; Wu, Dingrong; Tian, Zhihui
通讯作者	Sun, SK
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2023
卷号	280
英文摘要	Irrigation is an important means of ensuring sustainable agricultural production, and therefore is critical for realizing Sustainable Development Goals. However, the persistence drought caused by climate change can deplete water resources and affect the irrigated agricultural crops negatively. Understanding changes in crop irrigation water requirement (IWR) and its meteorological driving factors can thus provide key information for long-term water resources management and agricultural planning. This is particularly true for high water -consuming crops in arid and semi-arid regions. We investigated the trends of cotton IWR at several temporal scales (monthly, annual, and growth stages) for the period of 1961-2020 based on the Trend-free Pre-whitening Mann-Kendall method. The major meteorological factors including relative contributions of reference crop evapotranspiration (ETo) and precipitation to cotton IWR were further examined using multiple linear regression and Pearson correlation analysis. Results showed that the average annual cotton IWR exhibited a significant decreasing trend over the study period, but a shift occurred after 1992. An area of increased cotton IWR was primarily located in Southern Xinjiang. Moreover, the inter-annual fluctuation of IWR at the mid-season stage was larger than at the other growth stages, and that in Northern Xinjiang was larger than in Southern Xinjiang. A statistically significant decrease in monthly IWR occurred over the entire growing season, except during the planting stage. ETo was the dominant factor affecting cotton IWR, even though average annual precipitation showed a long-term increasing trend with a rate of change of 0.615 mm/year (p < 0.01). Relative humidity and wind speed were the two main factors affecting cotton IWR in Xinjiang due to the strong correlation with ETo. Demand for irrigation water was greatest during June to August when the relative contribution of ETo was more than 80%, followed by September. Our findings demonstrated that the temporal pattern of ETo should be given greater attention when planning for wise and efficient use of regional water resources and for designing irri-gation systems.
英文关键词	Meteorological driving factors Cotton growing season Crop coefficients Trend change Multi-temporal scale
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:000948463900001
WOS关键词	FUTURE CLIMATE-CHANGE ; YELLOW-RIVER BASIN ; REFERENCE EVAPOTRANSPIRATION ; ARID REGION ; PRECIPITATION EXTREMES ; SPATIAL VARIATION ; NORTHWEST CHINA ; LOESS PLATEAU ; DEMAND ; AGRICULTURE
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/2XILL650/395053
推荐引用方式 GB/T 7714	Geng, Qingling,Zhao, Yongkun,Sun, Shikun,et al. Spatio-temporal changes and its driving forces of irrigation water requirements for cotton in Xinjiang, China[J],2023,280.
APA	Geng, Qingling.,Zhao, Yongkun.,Sun, Shikun.,He, Xiaohui.,Wang, Dong.,...&Tian, Zhihui.(2023).Spatio-temporal changes and its driving forces of irrigation water requirements for cotton in Xinjiang, China.AGRICULTURAL WATER MANAGEMENT,280.
MLA	Geng, Qingling,et al."Spatio-temporal changes and its driving forces of irrigation water requirements for cotton in Xinjiang, China".AGRICULTURAL WATER MANAGEMENT 280(2023).