干旱地区农业研究2013，Vol.31Issue(3)：227-233,7.
基于订正后的CI指数分析近50年干旱对山西省玉米产量的影响
Impact of drought on maize yield of Shanxi Province during the past 50 years based on revised meteorological drought composite index
摘要
Abstract
Daily meteorological drought composite indexes (CI) from 1961 to 2010 were calculated based on daily air temperature and precipitation data of observation stations in Shanxi Province.By comparison of CI with soil moisture status observation data from the near crop stations from 1992 to 2010,evaluation criterion of CI for maize in drought was revised according to the region and growth stages.Quantitative assessment model of maize drought losses in Shanxi province was also constructed based on the maize unit yield during the past 50 years.The results showed a significant discrepancy between evaluation criterion of CI for maize in drought and traditional classification of meteorological drought category was observed.For example,evaluation criterion of CI for maize in drought in Southern Shanxi was ≤-1.2 for stages from seeding to emergence,jointing to teaseling and milky maturity to full maturity,≤-1.3 for stage from emergence to jointing,and ≤-0.9 for stages from teaseling to milky maturity.Accumulative drought index of the whole growth stages and meteorologically influenced yield of maize were significantly positive correlated,with a coefficient of correlation of 0.9335 for Northern Shanxi,0.6929 for Middle Shanxi and 0.8041 for Southern Shanxi.By using quantitative assessment model of maize drought losses in Shanxi province,simulated yield and actual yield passed the Pearson significance test,and production loss of maize in drought can be assessed more accurately with these models.关键词
综合气象干旱指数(CI)/气象干旱/玉米产量/山西省Key words
meteorological drought composite index(CI)/ meteorological drought/ maize yield/ Shanxi Province分类
农业科技引用本文复制引用
徐玲玲,王建林,宋艳玲,郑昌玲,方利,宋迎波..基于订正后的CI指数分析近50年干旱对山西省玉米产量的影响[J].干旱地区农业研究,2013,31(3):227-233,7.基金项目
国家行业专项"气候变化背景下农业气象灾害对我国农业生产影响的评估技术"(GYHY201106021) （GYHY201106021）
