南水北调与水利科技（中英文）2025，Vol.23Issue(4)：905-914,10.DOI:10.13476/j.cnki.nsbdqk.2025.0091
灌区冬小麦灌溉节点优化及产量效应模拟
Irrigation time optimization and yield simulation on winter wheat in irrigated area
摘要
Abstract
The North China Plain,a key grain-producing region in China,has very limited water resources.However,the largest water usage in this area is for agricultural purposes,with most of the water used for wheat irrigation.Since winter wheat is sensitive to water deficits at different growth stages,identifying critical irrigation timings and optimizing the irrigation system are essential for improving water use efficiency.Research in this area is important for food security and water resource management. Junliu irrigation district in Handan was chosen as the research area for this study.Regional surveys on winter wheat irrigation systems and physical experiments analyzing soil components were conducted.Based on these,different experimental schemes were set up for various irrigation nodes and frequencies during the critical growth stage of winter wheat.In the sample fields within the study area,along with the Artificial Rainfall Runoff and Water-saving Irrigation Experimental Base of Hebei University of Engineering,irrigation experiments took place from March to June 2023.Using the results of these experiments and changes in soil texture,twelve scenarios were designed.The EPIC model was used to simulate crop growth and yields under these scenarios,with the goal of identifying suitable irrigation strategies schemes. The experimental findings highlight a significant increase in yield associated with strategically delaying irrigation during the jointing stage,as this delay prompts a stronger water deficit compensation effect.Simulation results show that,regardless of soil texture,postponing one irrigation can raise yields by 7.20％to 21.30％,while delaying two irrigation events can further increase yields by 9.40％to 29.10％.Winter wheat fields respond differently to various irrigation strategies depending on soil texture:in Weixian County,Groups A and B show minimal differences in soil layer composition,resulting in relatively small yield variations under the same irrigation conditions,ranging from 1.35％to 3.38％,with 2.17％to 5.19％variations caused by delaying irrigation during the jointing stage.In contrast,Group C in Weixian County,which has higher clay content and lower bulk density,exhibits more notable yield differences among groups,from 3.38％to 26.79％,with 11.11％to 49.57％differences observed when irrigation is delayed during the jointing stage. In summary,the jointing stage is critical in winter wheat's transition from vegetative to reproductive growth,where water deficit significantly impacts yield.Delaying irrigation during this vital period can enhance yield due to increased water deficit compensation.In situations with limited irrigation availability,the interaction between soil texture and the strategic timing of irrigation becomes a key factor.Soil texture affects root water uptake,while increased soil compaction can reduce the positive effects of irrigation on crop growth and development.Therefore,appropriate tillage methods should be incorporated into agricultural practices in areas with high compaction.When water is scarce,two-water irrigation is recommended for regions with high soil compaction.Conversely,areas with lower compaction can achieve satisfactory yields with single-water irrigation.This study provides valuable insights for improving local agricultural water resource management.关键词
生长期/田间试验/土壤异质/冬小麦/EPIC/产量模拟Key words
growth process/field experiment/soil heterogeneity/winter wheat/EPIC/yield simulation分类
建筑与水利引用本文复制引用
栾清华,毕宏铠,张常昊,王利书,周玉良,张海生,翁白莎..灌区冬小麦灌溉节点优化及产量效应模拟[J].南水北调与水利科技（中英文）,2025,23(4):905-914,10.基金项目
国家自然科学基金项目(52379006 （）
52209049) （）
河北省自然科学基金项目(E2024402117) （E2024402117）
