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Simulating the exploration of the optimal irrigation of spring wheat in drought areas based on SWAP model

文献类型： 外文期刊

作者： Jin, Jianxin 1 ; Ding, Yimin 1 ; Sun, Boyan 1 ; Li, Saiju 1 ; Guo, Zheng 1 ; Zhu, Lei 1 ;

作者机构： 1.Ningxia Univ, Sch Civil & Hydraul Engn, Yinchuan 750021, Peoples R China

2.Ningxia Univ, Key Lab Internet Water & Digital Water Governance, Yinchuan, Peoples R China

3.Ningxia Acad Agr & Forestry Sci, Inst Agr Resources & Environm, Yinchuan, Peoples R China

关键词： arid area; irrigation scheduling; spring wheat; SWAP; water productivity; zone aride; planification de l'irrigation; bl & eacute; de printemps; productivit & eacute; de l'eau

期刊名称：IRRIGATION AND DRAINAGE （ 影响因子：1.7； 五年影响因子：1.7 ）

ISSN： 1531-0353

年卷期： 2025 年 74 卷 3 期

页码：

收录情况： SCI

摘要： Water scarcity and low irrigation efficiency are the main factors causing yield losses in spring wheat in arid areas. To propose optimised irrigation scheduling for spring wheat in the arid areas of Ningxia, China, we first calibrated the SWAP (soil-water-atmosphere-plant) model and then utilised the well-tested SWAP model during three typical rainfall years to evaluate the 542 irrigation schemes. The results showed that the model performed well in simulating the plant height, leaf area index (LAI) and biomass of spring wheat under different water stress conditions. The R2 values of the above three crop growth indicators were all greater than 0.89, and the normalised root mean square error (NRMSE) was less than 18% in the validation period. Additionally, the model achieved a high degree of accuracy in simulating the soil water content, evapotranspiration and yield, with RMSEs of 2%, 31 mm, and 326 kg/ha, respectively. The total irrigation amounts of 290, 320 and 350 mm with five, six and six irrigation times in the wet, average, and dry years, respectively, could achieve relatively high yields as well as improved water use efficiency (WUE) and irrigation water use efficiency (IWUE). The results can provide useful information for the efficient utilisation of irrigation water resources in arid areas.

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