灾害学2018，Vol.33Issue(2)：89-98,10.DOI:10.3969/j.issn.1000-811X.2018.02.017
基于作物水分亏缺指数的吉林省玉米不同生育时段干旱特征分析
Analysis of Characteristic on Drought in Different Developmental Times of Maize Based on Crop Water Deficit Index in Jilin Province
摘要
Abstract
Based on daily meteorological data from1961 to 2015 of 46 meteorological stations,and Penman-Montieth equation,the water requirement,precipitation and crop water deficit index(CWDI) in every ten days of Maize growth stages were calculated.According to the drought level indicators,frequency of different grade drought,average intensity of drought,and risk index of drought were calculated in each ten days and their spatial distribution and temporal variation were analyzed.The result showed that,in terms of water supply and demand in maize growth season,the water deficit is the most serious in the West in the whole growth season,and it is susceptible to drought threatened,while the threat of drought in the Middle is inferior to the west,and the threat of drought in the East is the least.The west has the highest drought occurrence frequency,followed by the Middle,and the East has the lowest drought frequency.Average intensity of drought,and risk index of drought have the nearly same distribution characteristics.Basically,frequency of each grade drought is high in the early and late stages,while it is low in the critical period of maize.Basically,with few exceptions,the occurrence frequency of the light drought is the highest,next is the moderate drought,while the occurrence frequency of the severe drought is low and the excessive drought is the lowest in each stage.The inter-annual variability of water deficit index of representative stations in each time periods is that,the early-middle stages have decreasing trend while the middle-late stages have increasing trend.There are also differences in the spatial distribution of each level risk area in different time periods.关键词
Penman-Monteith/需水量/作物水分亏缺指数/生长季/干旱/玉米/吉林Key words
Penman-Monteith/Water requirement/crop water deficit index/Growth seasons/Drought/Maize/Jilin分类
资源环境引用本文复制引用
邱美娟,郭春明,王冬妮,袁福香,王美玉,穆佳,王琪..基于作物水分亏缺指数的吉林省玉米不同生育时段干旱特征分析[J].灾害学,2018,33(2):89-98,10.基金项目
中国气象局沈阳大气环境研究所2016年开放基金课题(2016SYIAE02) （2016SYIAE02）
吉林省任务下达式课题“吉林省水稻气候品质评价指标及应用”(2015020). （2015020）
