节水灌溉Issue(3)：42-47,54,7.DOI:10.12396/jsgg.2025357
内蒙古寒区水稻灌溉需求与降雨利用分析
Analysis of Rice Irrigation demands and Rainfall Utilization in Cold Regions of Inner Mongolia
摘要
Abstract
Understanding the relationship between precipitation and rice irrigation requirements in the cold regions of Inner Mongolia provides crucial evidence for optimizing irrigation schedule and promoting efficient water resource utilization.Based on daily meteorological data from 1959 to 2017 at four representative rice stations in the cold regions of Inner Mongolia,this study constructed a water balance model.The Mann-Kendall test was applied to analyze the trends of water balance components,while the Pearson correlation coefficient and maximal information coefficient were used to reveal the relationships among these components.In addition,precipitation concentration degree and concentration period were employed to characterize the temporal distribution of rainfall.The results show that during the rice growing season in Inner Mongolia's cold regions,rainfall is relatively low(<500 mm)while crop water demand is high(>600 mm),resulting in significant overall irrigation demands:Kailu(921.1 mm)>Bairin Left Banner(799.7 mm)>Jalaid Banner(777.6 mm)>Zhalantun(669.5 mm).All sites exhibited high rainfall utilization rates(>80%)but low rainfall contribution rates(<40%).Although limited rainfall was efficiently utilized,it remained insufficient to meet irrigation requirements.In recent years,rainfall has shown a decreasing trend,while ETc has increased,leading to a growing dependence on irrigation.Under future climate change scenarios characterized by reduced rainfall and enhanced ETc,Inner Mongolia's cold regions can optimize irrigation patterns by integrating rainfall forecasts to enhance rainfall contribution and alleviate water resource pressure.关键词
寒区水稻/作物需水/灌溉需求/降雨利用/降雨集中度/降雨集中期/稻田水量平衡Key words
cold region rice/crop water requirement/irrigation demand/rainfall utilization/precipitation concentration degree/precipitation concentration period/paddy field water balance分类
农业科技引用本文复制引用
张恒,纪雪晴,华克骥,徐阳,胡旭铧,赵崇信,崔远来,罗玉峰..内蒙古寒区水稻灌溉需求与降雨利用分析[J].节水灌溉,2026,(3):42-47,54,7.基金项目
国家自然科学基金项目(52379046) （52379046）
内蒙古水利科技项目(NSK202601). （NSK202601）
