| 河南省小麦青枯发生规律的EOF分析 |
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| 引用本文： | 陈怀亮,张雪芬,邹春辉,祝新建.河南省小麦青枯发生规律的EOF分析[J].气象科技,2005(Z1). |
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| 作者姓名： | 陈怀亮 张雪芬 邹春辉 祝新建 |
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| 作者单位： | 河南省气象科学研究所 河南省获嘉县气象局 郑州 |
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| 基金项目： | 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 |
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| 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。
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| 关 键 词： | 小麦 青枯发生日数 EOF分析 空间分布 周期 |
EOF Analysis of Immature Death of Wheat in Henan Province |
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| Chen Huailiang Zhang Xuefen Zou Chunhui Zhu Xinjian.EOF Analysis of Immature Death of Wheat in Henan Province[J].Meteorological Science and Technology,2005(Z1). |
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| Authors: | Chen Huailiang Zhang Xuefen Zou Chunhui Zhu Xinjian |
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| Institution: | Chen Huailiang~1 Zhang Xuefen~1 Zou Chunhui~1 Zhu Xinjian~2 |
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| Abstract: | 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 power spectrum analysis on time coefficients.The distinct correlation exists between the first,second modality time coefficients and the wheat yield in Henan Province. |
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| Keywords: | immature death of wheat EOF analysis spatial distribution period |
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