干旱区生态环境知识资源中心(Arid): Evapotranspiration and potential water saving effect evaluation of mulched maize fields in China

Arid

DOI	10.1016/j.jhydrol.2024.130658
	Evapotranspiration and potential water saving effect evaluation of mulched maize fields in China
	Wang, Chunyu; Li, Sien; Kang, Shaozhong; Du, Taisheng; Huang, Siyu; Yang, Hanbo; Wang, Xuhui; Cui, Yaokui; Wu, Mousong
通讯作者	Li, S
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2024
卷号	630
英文摘要	To alleviate the contradiction between crop evapotranspiration (ET) and available water resources, and to develop agricultural production, mulched irrigation, as a water saving technology, is popularized in arid areas of China. However, the observations of ET in long-term mulched farmlands are scarce, so the inter-annual variation and controlling factors of ET after mulching remain uncertain, and the overall water saving effect of mulching in arid areas has not been quantified. Therefore, we conducted the observation experiments (2007-2021) on a mulched maize field, applied the modified Shuttleworth-Wallace model and obtained multi-source data statistics to fill in the gaps in the previous research. The results showed that the mean ET in the past 15 years was 521.68 mm, and the arid areas faced more severe water demand pressure. The inter-annual ET trend of the mulched maize field increased significantly, mainly caused by the reference evapotranspiration (ET0), while the interannual fluctuation was mainly attributed to the crop coefficient (Kc). The contribution of plant transpiration (Tr) to ET was always greater than that of soil evaporation (Es), and the contribution of solar radiation (Rs) to ET was the largest among environmental factors. In addition, based on observation data and model simulation, it was revealed that the water saving amount and ratio of the long-term mulched maize field were estimated to be 83.8 mm and 13.3 %, respectively. Furthermore, the statistical results from 49 sites in five provinces (regions) in Northwest China showed that compared with the agricultural water use in the recent 10 years, the mean annual total potential water saving amount and ratio of the mulched maize field were 2.2 billion m3 and 2.5 %, respectively. Our study will provide important guidance for understanding the variation of crop ET and water resources allocation.
英文关键词	Water cycle Mulch Evapotranspiration components Water saving effect Multi-source data statistics
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001173360900001
WOS关键词	INTERANNUAL VARIABILITY ; TERRESTRIAL ; TRANSPIRATION ; ENVIRONMENT ; FLUXES ; MODIS
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/404547
推荐引用方式 GB/T 7714	Wang, Chunyu,Li, Sien,Kang, Shaozhong,et al. Evapotranspiration and potential water saving effect evaluation of mulched maize fields in China[J],2024,630.
APA	Wang, Chunyu.,Li, Sien.,Kang, Shaozhong.,Du, Taisheng.,Huang, Siyu.,...&Wu, Mousong.(2024).Evapotranspiration and potential water saving effect evaluation of mulched maize fields in China.JOURNAL OF HYDROLOGY,630.
MLA	Wang, Chunyu,et al."Evapotranspiration and potential water saving effect evaluation of mulched maize fields in China".JOURNAL OF HYDROLOGY 630(2024).