| 近50年东北地区春玉米干旱的时空演变特征 |
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| 引用本文： | 董秋婷,李茂松,刘江,王春艳.近50年东北地区春玉米干旱的时空演变特征[J].自然灾害学报,2011(4). |
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| 作者姓名： | 董秋婷 李茂松 刘江 王春艳 |
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| 作者单位： | 沈阳农业大学农学院;中国农业科学院农业资源与农业区划研究所; |
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| 基金项目： | 973课题(2010CB951504) |
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| 摘 要： | 利用东北地区70个气象站点1960-2007年间的逐日气象资料,计算了作物水分亏缺指数(CWDI)并划分了干旱等级;利用ArcGIS软件,绘制了东北地区春玉米种植区的干旱等级时空分布图,对各个年代和生育期的玉米干旱灾害时空分布特征和演变趋势进行了分析。结果表明:在春玉米生长季内,玉米的需水量与降水量均呈现先增加后减少的变化趋势7,月下旬达到峰值,在4-6月和9月份水分亏缺指数(CWDI)值较高,易引起玉米发生干旱。
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| 关 键 词： | 干旱 作物水分亏缺指数 时空特征 春玉米 |
Spatio-temporal evolution characteristics of drought of spring maize in northeast China in recent 50 years |
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| DONG Qiu-ting,LI Mao-song,LIU Jiang,WANG Chun-yan.Spatio-temporal evolution characteristics of drought of spring maize in northeast China in recent 50 years[J].Journal of Natural Disasters,2011(4). |
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| Authors: | DONG Qiu-ting LI Mao-song LIU Jiang WANG Chun-yan |
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| Institution: | DONG Qiu-ting1,LI Mao-song2,LIU Jiang1,WANG Chun-yan2(1.Shenyang Agricultural University,Shenyang 110866,China,2.Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences,Beijing 100081,China) |
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| Abstract: | Daily weather data of 70 meteorological stations from 1960 to 2007 in northeast China were used to calculate crop water deficit index(CWDI) and divide the grade of drought.Using ArcGIS software to draw the spatial and temporal distribution map of drought grade of the spring maize growing areas in northeast China,its temporal and spatial distribution characteristics and evolution trend were analyzed for different decades and growth stages of spring maize.Results indicate that in the spring maize growing seas... |
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| Keywords: | drought crop water deficit index(CWDI) spatiotemporal characteristic spring maize |
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