摘要
综合考虑水分亏缺量,持续时间、作物水分敏感度等几个因素,建立陇东农业旱灾综合评估指数。应用小波分析方法,进一步分析该区冬小麦、玉米等主要作物生育期不同时段旱灾指数的多时间尺度特征,在此基础上对该区农业旱灾的演变趋势做了初步的探讨和评估。
A complex index of evaluating agricultural drought disasters was explored considering some factors such as water shortage degree,the duriation and sensitivity of crops to water shortage,etc.,and the index can be applied in monitoring and evaluating agricultral drought disasters.Multiple time scales charateristics of main crops＇ drought index was further analysed by using the wavelet analysis method which can provide some references for rational use of climatic resources and making decisions.
出处
《干旱地区农业研究》
CSCD
北大核心
2009年第2期17-20,27,共5页
Agricultural Research in the Arid Areas
基金
中国气象局新技术应用推广项目(CMATG2005M22)
关键词
陇东黄土高原
农作物
旱灾指数
小波分析
agricultural drougth index
main crop
wavelet analysis
Longdong loess plateau
