摘要
【目的】识别吉林省玉米生长季内不同生育期的旱涝时空演变特征。【方法】利用吉林省27个气象站1961—2020年逐日气象数据,在基于分段函数估算逐日作物系数(K_(c))的基础上,计算各站点逐日改进型作物水分亏缺指数(mCWDI),然后利用气候倾向率和重心转移等方法对吉林省玉米生长季旱涝时空演变规律进行分析。【结果】吉林省玉米干旱频率呈现由西北向东南依次递减的变化趋势,玉米生育初期至发育期的干旱频率呈减少趋势,而生育中后期干旱呈增强趋势,东南地区雨涝频率在玉米生育前期和后期较高,在玉米发育期较低。同时,吉林省中部地区玉米雨涝频率增速高于其他地区。【结论】吉林省玉米生育初期至发育期的干旱频率呈减少趋势,而玉米生育中后期呈增强趋势,中部地区雨涝频率增速高于其他地区。
【Objective】Drought and waterlogging are two abiotic stresses impacting crop growth in many regions across the world.Understanding their variation is a prerequisite to their management and safeguarding agricultural production.Taking Jilin province in northeast China as an example,this paper analyzes spatiotemporal change of drought and waterlogging during maize growth season over the past 60 years.【Method】Daily meteorological data measured from 1961 to 2020 at 27 weather stations across the province were used to calculated the modified crop water deficit index(mCWDI).The daily crop coefficient(K_(c))was estimated using the piecewise function.The characteristics of the drought and waterlogging were calculated using the climatic variation trend method and the center of gravity transfer method.【Result】Spatially,the frequency of drought shows a decreasing trend from the northwest to the southeast.Temporally,the frequency of drought decreases from the early stage to the development stage,with the drought occurring more frequently in the middle and late stages of the maize.The waterlogging occurred more frequently in the southeast and in the early and late growth stage,and less frequently in the development stage of the maize.We also found that the occurrence of waterlogging in the central province increased faster than in other regions.【Conclusion】Drought and waterlogging in Jilin province vary temporally and spatially.The results presented in this paper provide guidelines for improving their management and safeguarding maize production in this region.
作者
郭恩亮
王永芳
王蕊
阿如娜
张耀东
GUO Enliang;WANG Yongfang;WANG Rui;A Runa;ZHANG Yaodong(College of Geographical Science,Inner Mongolia Normal University,Hohhot 010022,China;Inner Mongolia Key Laboratory of Disaster and Ecological Security on the Mongolian Plateau,Hohhot 010022,China;School of Chemical&Environmental Engineering,Liaoning University of Technology,Jinzhou 121000,China)
出处
《灌溉排水学报》
CAS
CSCD
北大核心
2022年第11期85-90,106,共7页
Journal of Irrigation and Drainage
基金
国家自然科学基金青年项目(41807507)
内蒙古自治区高等学校青年科技英才支持计划项目(NJYT22028)。
关键词
改进型作物水分亏缺指数
旱涝
玉米
吉林省
modified crop water deficit index
drought and waterlogging
maize
Jilin province
