华北农学报2025，Vol.40Issue(z1)：78-85,8.DOI:10.7668/hbnxb.20195606
基于MCI指数研究河北省冬小麦生育期干旱特征
Research on Drought Characteristics of Winter Wheat Growth Period in Hebei Province Based on MCI Index
摘要
Abstract
It is important for agricultural production to study the spatial and temporal distribution of winter wheat drought in Hebei Province.Based on the meteorological observation data of 119 national meteorological sta-tions in Hebei Province during the growing period of winter wheat from 1991 to 2021,based on the national standard of"Meteorological Drought Grade"(GB/T 20481-2017),we calculated the meteorological drought composite index(MCI)and analyzed the spatial and temporal distribution characteristics of winter wheat drought in Hebei Province in recent 30 years.The results showed that:the frequency of drought decreased gradually with the drought grade from light drought to extreme drought.The average frequency of light drought occurrence in different growth stages of winter wheat in Hebei Province ranges from 22.1％to 22.5％.The average frequency of medium drought occur-rence ranges from 11.7％to 14.5％.The average frequency of heavy drought occurrence ranges from 3.6％to 5.5％.The average frequency of extreme drought occurrence ranges from 0.4％to 1.0％.During the whole growth period,the areas with relatively high frequency of occurrence of medium drought and above were mainly distributed in most parts of Hengshui,west and south of Cangzhou,east of Xingtai,and east of Handan,and the frequency of oc-currence was more than 20.25％.From 1991 to 2021,the drought intensity and range of winter wheat in Hebei Province showed a significant decreasing trend in the middle and later stages of growth.关键词
冬小麦/干旱特征/气象干旱综合指数(MCI)/河北省/生育期Key words
Winter wheat/Characteristics of drought/MCI/Hebei Province/Growth stage分类
农业科技引用本文复制引用
高泽田,董航宇,范俊红,代立芹,冯雪,李文晴..基于MCI指数研究河北省冬小麦生育期干旱特征[J].华北农学报,2025,40(z1):78-85,8.基金项目
国家重点研发计划项目(2022YFD2300202) （2022YFD2300202）
河北省气象局科研开发项目(24ky09) （24ky09）
