摘要
利用辽宁省1949～2007年的干旱灾害和粮食生产统计资料,分析了干旱灾害的基本特征及其对辽宁粮食生产的影响.结果表明：（1）1949～2007年辽宁省干旱灾害在时间上呈波动性加重发展,21世纪前期最高,20世纪70年代前期和80年代后期其次;（2）辽宁因旱灾粮食减产量从1981年开始显著增加;（3）干旱灾害强度指数的分析表明,干旱灾害对辽宁粮食生产的致灾强度增大.旱灾是影响粮食生产的重要因素,对辽宁的粮食生产危害较大.同时,旱灾呈现影响范围逐年扩大、强度明显增大的趋势.
Based on the statistical data of drought and grain production from 1949～2007 in Liaoning Province,the characteristics of drought and its effect on grain production were analyzed in order to provide references for drought reduction and prevention.The results show that drought is of fluctuation and getting more and more serious from 1949～2007 in Liaoning.The frequency of drought is the highest during 2000～2007,then in the early 1970s and the last 1980s.Grain yield reduction takes an obvious increasing trend since 1981.Disaster-induced intensity of drought on grain production becomes more and more obvious in terms of drought intensity index.Drought is an important factor influencing grain production in the province.Furthermore,the region affected by drought is being enlarged year after year,and drought intensity is increasing obviously.
出处
《干旱地区农业研究》
CSCD
北大核心
2011年第3期254-259,共6页
Agricultural Research in the Arid Areas
基金
中央级公益性科研院所基本科研业务费专项"春玉米干旱胁迫影响定量评价及业务系统研发"(SYKYYW200904)
2009年辽宁省气象局科研课题"辽宁省主要农业气象灾害风险评估研究"(200907)
关键词
干旱灾害
粮食生产
辽宁省
drought
grain production
Liaoning Province
