河南省小麦青枯发生规律的EOF分析  

EOF Analysis of Immature Death of Wheat in Henan Province

作　　者：陈怀亮[1] 张雪芬[1] 邹春辉[1] 祝新建[2] 

机构地区：[1]河南省气象科学研究所,郑州450003 [2]河南省获嘉县气象局,获嘉453800

出　　处：《气象科技》2005年第S1期131-135,共5页Meteorological Science and Technology

基　　金：科技部社会公益项目(2001DIB10089);中国气象局项目"农业气象试验站生态环境监测和信息服务试验示范"资助

摘　　要：通过对河南省30个台站1967~1996年30年的气象资料统计,得出全省小麦青枯发生日数,对其进行EOF分析,发现全省小麦青枯发生日数主要呈“中部多南北部少”空间分布型,另外还有其它几种空间分布型;小麦青枯发生日数随时间推移呈减少趋势;对各模态时间系数进行功率谱分析,发现小麦青枯发生日数具有较明显的准3年周期;第一、第二模态时间系数与全省小麦单产存在显著负相关关系,为防御和减轻小麦青枯灾害提供了理论依据。The number of the days of wheat immature death occurrence is obtained through the statistical analysis of meteorological data from 30 stations in Henan Province from 1967 to 1996 and the EOF analysis is conducted.The results show that the number of days of wheat immature death occurring has a main spatial distribution pattern of "greater in the middle and less in south and north." Meanwhile,the wheat immature death occurrence has a decreasing tendency with time.The quasi-three year period is found by the po...

关 键 词：小麦 青枯发生日数 EOF分析 空间分布 周期 

分 类 号：S435.121[农业科学—农业昆虫与害虫防治]