灌溉排水学报2026，Vol.45Issue(4)：71-81,11.DOI:10.13522/j.cnki.ggps.2025245
淮北平原作物生育期气象和农业干旱特征及其驱动因子
Spatiotemporal patterns and driving factors of meteorological and agricultural droughts during winter wheat-summer maize growth period in the Huaibei Plain
摘要
Abstract
[Objective]Drought is a major abiotic stress affecting agricultural production in the Huaibei Plain.Understanding its spatiotemporal patterns and driving factors is essential for developing effective mitigation strategies.This study analyzes the spatial variations and driving factors of meteorological and agricultural droughts during the growth periods of winter wheat and summer maize in the region.[Method]The analysis was based on ERA5-Land reanalysis data from 1975 to 2024,from which we estimated the daily Standardized Precipitation Evapotranspiration Index(SPEI)for meteorological drought and the Soil Water Deficit Index(SWDI)for agricultural drought.For each crop,the number of drought days during each growth stage was calculated,and spatial distribution maps of both drought types were generated.The effects of meteorological and soil factors on drought during different crop growth stages were evaluated using Pearson's and Spearman's correlation analyses.[Result]①For winter wheat,droughts were more frequent from the sowing-emergence to emergence-regreening stage than in other stages.Agricultural droughts could last consecutively up to 58 days,significantly longer than the maximum duration of meteorological droughts(46 days).Spatially,meteorological droughts occurred more frequently in the northern region,while agricultural droughts followed a'more in the north,less in the south'pattern.②For summer maize,droughts were mainly agricultural,particularly during the filling-maturity stage,where drought could last consecutively for 24 days.Spatially,droughts were more severe in the southern region than in the north.③Meteorological droughts were driven by hydrothermal factors,with winter wheat drought influenced by precipitation,temperature and evapotranspiration,whereas summer maize drought was mainly affected by precipitation and dew-point temperature.In contrast,agricultural droughts were primarily driven by soil moisture,indirectly influenced by evapotranspiration and temperature through the imbalance between soil water supply and crop water demand.[Conclusion]The sowing-regreening stage of winter wheat and the filling-maturity stage of summer maize in the Huaibei Plain are particularly prone to drought stress.Agricultural droughts are dominant and exhibit distinct regional variations.Differences in the determinants of meteorological and agricultural droughts can guide precision irrigation strategies,such as improving soil water content during the early growth stage of winter wheat and maintaining root-zone moisture during the late growth stage of summer maize.关键词
淮北平原/冬小麦/夏玉米/气象干旱/农业干旱/驱动因素Key words
Huaibei Plain/winter wheat/summer maize/meteorological drought/agricultural drought/driving factors分类
农业科技引用本文复制引用
肖瑞欣,朱永华,吕海深,梁晨辉,裴珂,李雨轩,李羿璇..淮北平原作物生育期气象和农业干旱特征及其驱动因子[J].灌溉排水学报,2026,45(4):71-81,11.基金项目
国家自然科学基金项目(42471019,42071033,41830752) （42471019,42071033,41830752）
