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中文摘要: 本文利用交叉谱分析方法,研究了东北地区5—9月积温与玉米气象产量序列周期振动间的相互关系,讨论了各序列的功率谱分布特征。结果表明,辽宁、吉林5—9月积温存在着3.33年的显著周期,黑龙江有2.5年周期。而玉米气象产量的显著周期,辽宁、吉林、黑龙江省分别为6.66、4.0、4.0年。
中文关键词:
Abstract:Based on a cross spectral analysis, the relationship between the periodic fluctuation of the accumulated temperature (∑T) during May to Sept. and corn yield (Y) is obtained, and the distribution features of the power spectra are discussed. The results show that there is a 3.3-year period of ET fluctuation in Liaoning and Jiling Provinces, and a 2.5-year one in Heilongjiang Province, a 6.68-, 4.0- and 4.0-year one of Y fluctuation in Liaoning, Jilin and Heilongjiang Province respectively.
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基金项目:
| 作者 | 单位 |
| 曹永华 | 中国农业科学院农业气象室 |
| Author Name | Affiliation |
引用文本：
曹永华,1988.东北地区生长季积温与玉米产量的交叉谱分析[J].气象,14(4):17-20.
,1988.A cross spectral analysis of accumulated temperature in the growth period and corn yield in Northeast China[J].Meteor Mon,14(4):17-20.
曹永华,1988.东北地区生长季积温与玉米产量的交叉谱分析[J].气象,14(4):17-20.
,1988.A cross spectral analysis of accumulated temperature in the growth period and corn yield in Northeast China[J].Meteor Mon,14(4):17-20.