干旱地区农业研究Issue(5)：237-244,8.DOI:10.7606/j.issn.1000-7601.2015.05.41
基于水分亏缺指数的陕西冬小麦干旱特征分析
Analysis on drought characteristics of winter wheat in Shaanxi Province based on crop water deficit index
摘要
Abstract
Based on the observation data collected from 22 weather stations during 1961—2010 ,the winter wheat water requirement ( ETi ) was measured ,the crop water deficit index ( CWDI ) of different classes of drought was deter-mined ,the frequencies of different classes of drought in Shaanxi were calculated ,and the temporal and spatial distribu-tion characteristics of winter wheat water deficit at different growth stages in Shaanxi area were studied .The results indi-cated that drought occurred frequently during the growth period of winter wheat in Shaanxi area .The occurrence frequen-cies of drought during wheat growth followed the following order:jointing-booting stage>filling maturation stage>turning green stage>seeding before winter>growing in winter .The occurrence frequency of severe or worse drought at various growth stages of winter wheat showed a decreasing trend from north to south . For inter-decade change characteristics , drought index fluctuation turned an increasing trend ,reaching high in 1970s and 1990s and becoming mutated in 1968 .关键词
水分亏缺指数/干旱频率/冬小麦/时空特征/陕西省Key words
crop water deficit index/drought frequency/winter wheat/Shaanxi province/spatiotemporal character-istic分类
农业科技引用本文复制引用
王连喜,胡海玲,李琪,孔坚文..基于水分亏缺指数的陕西冬小麦干旱特征分析[J].干旱地区农业研究,2015,(5):237-244,8.基金项目
国家科技支撑计划“全球变化环境下作物产量的影响与适应监测评估技术” （）
